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We torn down engine in my 91 mercury grand marquis and replace manifold gasket,rocker arm gaskets,throttle body egr gasket,timing chain,timing chain gaskets,replaced radiator,radiator hose under neither and one on top next to engine,spark plugs and throttle position senor and now it wont start. it turns over and acts like it wants to start but does not. what could be the peoblem? please help!!

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  • 194 Answers

Recheck valve timing and initial ignition timing for correct settings.

Posted on May 11, 2014

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SOURCE: 95 GMC Jimmy 4.3l W vin rough idle

My problem was solved when I repaired my 4 wd activation dash switch. The switch was contacting on 2WD & 4HI at the same time. The front differential activation is vacuum activated possibly creating a tug of war that didn't actually engage it but drained off vacuum from the engine? A theory at best but stumbbled across it because I knew the switch wasn't working properly I repaired it and low and behold rough idle disappeared and all is good for 3 weeks running.

Posted on Dec 10, 2008

polarcycle
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SOURCE: My 1995 Buick Lesabre is misfiring

If it only happens at a certain point in the throttle travel, it may be a bad TPS. You would need a computer to confirm loss of signal, but that is what it sounds like.

Posted on Jun 08, 2009

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SOURCE: 1989 Cavalier Z24 Stalling problem

Have you heard of Noid lights? You unplug the fuel injector and plug these in and they will light up if the injector is getting power. This might give you a better hint. There are also lights that go inbetween the spark plug and wire. Between these two items you may be able to narrow down the problem to a specific system. I believe that your car has a coil pack. Some of these engines have problems with the crank trigger. I believe it is located on the back side of the motor. If you decide to change it, be careful. I have heard of them breaking into two pieces and becoming a big problem.

Posted on Jul 21, 2009

  • 12650 Answers

SOURCE: I have a leak around timing chain cover.

u didnt indicate what is leaking oil or anti-freeze there is a gasket for the timing chain cover (oil) but the water pump is there also (anti-freeze)

Posted on Nov 26, 2009

Testimonial: "thanks for your help. Its leaking water around the timing chain."

  • 1 Answer

SOURCE: 1999 dodge ram 1500, 5.9L, stalls out at idle.

I had the same symptom and it turns out the previous owner had installed an aftermarket alternator pulley. That pulley, while saving a few horsepower, spun the alternator slower, and didn't produce enough juice to charge the battery at all - at idle I would kill my battery within the hour. I had to go back to a factory pulley, and presto - problem fixed! My lights don't dim to 50% brightness at a stop sign anymore :)

Posted on Apr 30, 2010

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P1131 and p1151 codes in 2001 mercury grand marquis, how do i fix it?


Try cleaning the MAF sensor first, then check for any unmetered air getting into throttle body (leaks in intake hose). Bank 1 is the driver's side of the engine (or front on FWD) and bank 2 is the passenger side.

Mar 02, 2015 | 2001 Mercury Grand Marquis

3 Answers

Do I have to take the timming belt off to do a head gasket on a 1999 chevy malibu v6 3.1L


The 3.1 engine does not have a belt,it is a chain motor.You do not need to remove timing chain to remove head.

Apr 12, 2011 | 1999 Chevrolet Malibu

1 Answer

Intakegasket for grandam gt


Exactly what is the wrong? Need the part? Need to know torque adjust or porcedure to take off?

For
1994 Pontiac Grand Am 3.1L SFI OHV 6cyl check this procedure for Intake Manifold...
(see Figure 14)
The 3.1L engine is equipped with upper and lower intake manifolds. The upper intake manifold is also known as the intake manifold plenum.

CAUTION The fuel system is under pressure and must be properly relieved before disconnecting the fuel lines. Failure to properly relieve the fuel system pressure can lead to personal injury and component damage.
  1. Relieve the fuel system pressure.
  2. Disconnect the negative battery cable.
  3. Remove top half of the air cleaner assembly and throttle body duct.
  4. Drain and recycle the engine coolant.
  5. Disconnect the EGR pipe from exhaust manifold.
  6. Remove the serpentine belt.
  7. Remove the brake vacuum pipe at the intake plenum.
  8. Disconnect the control cables from the throttle body and intake plenum mounting bracket.
  9. Remove the power steering lines at the alternator bracket.
  10. Remove the alternator.
  11. Label and disconnect the ignition wires from the spark plugs and wire retainers on the intake plenum.
  12. Remove the ignition assembly and the EVAP canister purge solenoid together.
zjlimited_601.jpg

Fig. 14: View of the intake manifold and related components

  1. Disconnect the upper engine wiring harness connectors at the following components:
    Throttle Position Sensor (TPS) Idle Air Control (IAC) Fuel Injectors Coolant temperature sensor Manifold Absolute Pressure (MAP) sensor Camshaft Position (CMP) sensor
  2. Tag and disconnect the vacuum lines from the following components:
    Vacuum modulator Fuel pressure regulator PCV valve
  3. Disconnect the MAP sensor from upper intake manifold.
  4. Remove the upper intake plenum mounting bolts and lift off the plenum.
  5. Disconnect the fuel lines from the fuel rail and bracket.
  6. Install engine support fixture special tool J 28467-A or an equivalent.
  7. Remove the right side engine mount.
  8. Remove the power steering mounting bolts and support the pump out of the way without disconnecting the power steering lines.
  9. Disconnect the coolant inlet pipe from the outlet housing.
  10. Remove the coolant bypass hose from the water pump and the cylinder head.
  11. Disconnect the upper radiator hose at thermostat housing.
  12. Remove the thermostat housing.
  13. Remove both rocker arm covers.
  14. Remove the lower intake manifold bolts. Make sure the washers on the four center bolts are installed in their original locations.
When removing the valve train components they should be kept in order for installation the original locations.
  1. Remove the rocker arm retaining nuts or bolts and extract the rocker arms and pushrods.
  2. Remove the intake manifold from the engine. Remove and discard the gasket.
  3. Using a suitable scraper, clean gasket material from all mating surfaces. Remove all excess RTV sealant from front and rear ridges of cylinder block
To install:
  1. Place a 0.12 inch (3mm) bead of RTV, on each ridge, where the front and rear of the intake manifold contact the block.
  2. Using a new gasket, place the intake manifold on the engine.
  3. Install the pushrods in their original locations. Coat the pushrods with prelube.
The intake pushrods are marked yellow (5 3 /4 inch long) and the exhaust are green (6 inches long). Make sure the pushrods are properly seated in the valve lifters and rocker arms.
  1. Position the rocker arms in there original locations and tighten to specifications. Refer to the procedure earlier in this section.
  2. Install lower the intake manifold attaching bolts. Apply sealant 12345739 (or equivalent thread locking compound) to the threads of bolts. Tighten the vertical bolts first then the diagonal bolts to 115 inch lbs. (13 Nm).
  3. Install the front rocker arm cover.
  4. Install the thermostat housing.
  5. Connect the upper radiator hose to the thermostat housing.
  6. Fasten the coolant inlet pipe to thermostat housing.
  7. Connect coolant bypass pipe at the water pump and cylinder head.
  8. Install the power steering pump in the mounting bracket.
  9. Loosely install the serpentine belt.
  10. Connect the right side engine mount.
  11. Remove the special engine support tool.
  12. Fasten the fuel lines to fuel rail and bracket.
  13. Install the upper intake manifold and tighten the mounting bolts to 18 ft. lbs. (25 Nm).
  14. Install the MAP sensor.
  15. Connect the upper engine wiring harness connectors to the related components removed earlier.
  16. Connect the vacuum lines to the PCV, vacuum modulator and fuel pressure regulator.
  17. Install the EVAP canister purge solenoid and ignition assembly.
  18. Install the alternator assembly.
  19. Connect the power steering line to the alternator bracket.
  20. Install the serpentine belt.
  21. Connect the spark plug wires to the spark plugs and intake plenum wire retainer.
  22. Install the EGR pipe to the exhaust manifold.
  23. Attach the control cables to the throttle body lever and upper intake plenum mounting bracket.
  24. Install air intake assembly and top half of the air cleaner assembly.
  25. Install the brake vacuum pipe.
  26. Fill the cooling system.
  27. Connect the negative battery cable, then start the vehicle and verify that there are no leaks.

For PARTS REPLACEMENT check in THIS LINK: carpartswholesale.com

Hope helps.

Feb 01, 2011 | 1994 Pontiac Grand Am

1 Answer

I have a 1992 Mercury Grand Marquis with the 4.6L V8 with roughly 50,000 to 60,000 miles on it and while the engine runes great when it is cold, when the engine warms up, it starts to rattle/knock during...


First, there are 8 bolts holding the metal Airhorn to the Intake manifold. Underneath this part is a gasket and under the gasket is a groove. The groove can Carbon up and affect the performance of your car. The gasket costs $10 and the job takes an hour or more.

If this does not help, you may need a knock sensor which is suppose to reduce the timing and keep the engine from knocking.

You can also get a free scan from Autozone or Oreillys and some other parts stores. This may tell you if other parts are needed. The gasket and groove I told you about will sometimes generate a Code 401. Just try cleaning the groove instead of buying an EGR or Solenoid.

Nov 07, 2010 | 1992 Mercury Grand Marquis

2 Answers

Need to replace the intake manifold


3.8L Engine (most common) Upper Intake Manifold To Remove:
  1. Drain the cooling system.
  2. Remove or disconnect the following:
    • Negative battery cable.
    • Fuel injector sight shield.
    • Air cleaner intake duct.
    • Right spark plug wires from the ignition control module and reposition.
  3. Relieve the fuel pressure.
  4. Remove or disconnect the following:
    • Fuel rail assembly.
    • Brake booster hose from the vacuum source manifold in the upper intake manifold.
    • Exhaust Gas Recirculation Valve (EGR) wiring harness heat shield nut, bolt and the EGR heat shield.
    • Throttle body support bracket upper bolt.
  5. Disconnect the electrical connectors from the following:
    • EVAP purge solenoid
    • Throttle Position (T/P) sensor
    • Idle Air Control (IAC) valve
    • Manifold Absolute Pressure (MAP) sensor
    • Mass Air Flow (MAF) sensor
    • EVAP purge solenoid vacuum line from the throttle body.
    • Accelerator and the cruise control cables with the bracket from the throttle body.
  6. Remove or disconnect the following:
    • Upper intake manifold bolts and stud.
    • Clean the upper intake manifold bolt threads.
  7. Remove or disconnect the following:
    • Upper intake manifold by lifting the back of the intake and sliding the manifold forward from the throttle body support bracket.
    • Upper-to-lower intake manifold carrier gasket from the upper intake manifold.
  8. If the upper intake manifold is being replaced, remove the following:
    • Throttle body assembly.
    • Manifold Absolute Pressure (MAP) sensor.
    • Positive Crankcase Ventilation (PCV) valve.
    • Vacuum source manifold.
Upper intake manifold bolt torque sequence (3.8L engine) gm-03-38-530.gif

To Install:
  1. If the manifold was replaced, install or connect the following:
    • Vacuum source manifold.
    • Positive Crankcase Ventilation (PCV) valve.
    • Manifold Absolute Pressure (MAP) sensor.
    • Throttle body assembly.
    • Upper-to-lower intake manifold carrier gasket to the upper intake manifold.
  2. Carefully place the upper intake manifold onto the lower intake manifold. Ensure that the alignment pins in the upper intake manifold align with the holes in the lower intake manifold. NOTE: Apply thread lock compound, to the bolt threads before assembly.
  3. Install or connect the following:
    • Upper intake manifold. Tighten the upper intake manifold bolts in sequence to 89 in lbs (10 Nm)
    • Accelerator and the cruise control cables with the bracket to the throttle body.
    • EVAP purge solenoid vacuum line to the throttle body.
  4. Connect the electrical connectors to the following:
    • Mass Air Flow (MAF) sensor
    • Manifold Absolute Pressure (MAP) sensor
    • Idle Air Control (IAC) valve
    • Throttle Position (T/P) sensor
    • EVAP purge solenoid
  5. Install or connect the following:
    • Throttle body upper support bracket bolt. Tighten the bolt to 89 in lbs (10 Nm)
    • EGR valve wiring harness heat shield, nut and the bolt. Tighten the nut and the bolt to 89 in lbs (10 Nm)
    • Brake booster hose to the vacuum source manifold.
    • Fuel rail assembly.
    • Right spark plug wires.
    • Air cleaner intake duct.
    • Fuel injector sight shield.
  6. Connect the negative battery cable.
  7. Fill the cooling system.
  8. Inspect for fluid or vacuum leaks.
Lower Intake Manifold (W/O Supercharger) To Remove:
  1. Remove or disconnect the following:
    • Upper intake manifold.
    • Generator brace.
    • Drive belt tensioner with the mounting bracket and the heater water bypass inlet pipe.
    • Exhaust gas recirculation EGR outlet pipe bolt from the lower intake manifold.
    • Radiator inlet hose from the water outlet housing.
    • ECT sensor electrical connector.
    • Right upper engine mount strut bracket.
    • Generator brace bracket bolts.
    • Generator brace bracket.
    • Lower intake manifold bolts.
    • Lower intake manifold.
    • Lower intake manifold seals.
    • Lower intake manifold gaskets.
  2. If replacing the lower intake manifold, Remove or disconnect:
    • Water outlet housing bolt and stud
    • Water outlet housing
    • Gasket and the thermostat.
    • ECT sensor.
  3. Inspect the flatness of inlet flanges.
  4. Clean the intake manifold mating surfaces.
  5. Clean the intake manifold bolts and bolt holes of adhesive compound.
To Install:
  1. If removed, install the ECT sensor.
    • Tighten the ECT sensor to 18 ft. lbs. (25 Nm)
  2. If removed, install the thermostat, the gasket, and the water outlet housing.
  3. If removed, install the water outlet housing bolt and the stud.
    • Tighten the bolt and stud to 20 ft. lbs. (27 Nm)
  4. Install or connect the following:
    • Lower intake manifold gaskets. NOTE: Apply sealer GM P/N 12346286 (Canadian P/N 10953472) or equivalent to the ends of the intake manifold seals.
    • Lower intake manifold seals.
    • Lower intake manifold.
    • Lower intake manifold bolts.
    NOTE: Apply thread lock compound GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the two hidden bolts and ensure they are installed.
  5. Tighten the lower intake manifold bolts in sequence to 11 ft. lbs. (15 Nm) gmpc_v6_5.gif

  6. Install or connect the following:
    • Generator brace bracket.
    • Generator brace bracket bolts. Tighten the bolts to 37 ft. lbs. (50 Nm)
    • Right upper engine mount strut bracket.
    • ECT sensor electrical connector.
    • Radiator inlet hose to the water outlet housing.
    • EGR outlet pipe to the lower intake manifold.
    • EGR outlet pipe bolt to the lower intake manifold. Tighten the bolt to 21 ft. lbs. (29 Nm)
    • Drive belt tensioner.
    • Generator brace.
    • Upper intake manifold.
  7. Inspect for leaks.
Lower Intake Manifold (W/ Supercharger) To Remove:
  1. Disconnect the negative battery cable.
  2. Drain the cooling system.
  3. Remove the supercharger.
  4. Remove the thermostat housing.
  5. Remove the EGR pipe at the intake manifold.
  6. Disconnect the electrical connection at the temperature sensor.
  7. Remove the intake manifold and gaskets.
NOTE: The coolant bypass tube will release from the intake manifold when the manifold is removed.
To Install:
  1. Clean the gasket sealing surfaces.
  2. Install the intake manifold gaskets.
  3. Align the coolant bypass tube with the opening in the intake manifold and install the manifold. Tighten the bolts to 11 lb ft (15 Nm).
  4. Install the electrical connector to the temperature sensor.
  5. Install the EGR pipe to the intake manifold.
  6. Install the thermostat housing.
  7. Install the supercharger.
  8. Fill the cooling system.
  9. Connect the negative battery cable.

Aug 05, 2010 | 1997 Pontiac Grand Prix

1 Answer

I have a leak around timing chain cover.Is there a gasket i need to replace or something more serious? the leak is on a 1987 Mercury Grand Marquis ,5.0L.


u didnt indicate what is leaking oil or anti-freeze there is a gasket for the timing chain cover (oil) but the water pump is there also (anti-freeze)

Nov 26, 2009 | 1987 Mercury Grand Marquis

1 Answer

Does anyone have engine schematics for a 2003 pontiac 3.1 V6? Or know of a site where I can find engine schematics? I have to replace an EGR Valve but don't know where it is located.


If you don't know where the EGR Valve is located, it is safe to assume that you did not properly diagnose your EGR system...how do you know the valve needs replacing?

If you are trying to fix a trouble code P0401 " Exhaust Gas Recirculation (EGR) Insufficient Flow" (This is a very common code with 3.1L GM Engines)
An EGR Valve replacement will most likely make you about $125 poorer than you were before and will not fix the problem.

Your EGR port into the intake manifold is most likely clogged up and needs to be cleaned out.

You will need a Throttle Body Gasket, an EGR Gasket, a can of ThrottleBody and Intake Cleaner, and a little antifreeze. (You will lose just a little when you remove the throttle body.)

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Remove the EGR Valve and the Throttle Body. Use a screw driver or pick to chip out the carbon buildup in the EGR port going into the intake manifold. You will probably have to work it from the intake side as well as the EGR side to get as much of the black carbon out as possible. Be careful not to let this stuff go down into the intake plenum - you will burn some valves if it gets in there. Then use the Throttle Body and Intake cleaner to finish the cleanup. (It helps to take a rag and stuff it into the intake manifold just past the EGR port to catch the gunk so it doesn't go down into the plenum...just don't forget to remove the rag before putting the Throttle Body back on)

Put everything back together and top-off your antifreeze and clear your computer codes. That should fix it.

Oct 27, 2009 | 2003 Pontiac Grand Prix

1 Answer

I need a diagram of a 1995 ford escort engine


96 escort 1.9L

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Engine Components
Item Part Number Description 1 6766 Oil Filler Cap 2 6A548 (8 Req'd) Valve Cover Bolt 3 6582 Valve Cover 4 — Exhaust Manifold Shield-to-Exhaust Manifold Nut (4 Req'd) 5 9A462 Exhaust Manifold Shield 6 — Exhaust Manifold Shield Stud (4 Req'd) 7 9430 Exhaust Manifold 8 9454 Exhaust Manifold Nut 9 9448 Exhaust Manifold Gasket 10 — Exhaust Manifold Stud (Fine Thread), Short (4 Req'd) 11 — Exhaust Manifold Stud, Long (1 Req'd) 12 — Exhaust Manifold Stud (Medium Thread), Short (1 Req'd) 13 6518 Valve Spring Retainer Key 14 6514 Valve Spring Retainer 15 6513 Valve Spring and Damper, Intake 16 6C515 Valve Tappet Guide Plate Retainer 17 6571 Valve Stem Seal 18 6513 Valve Spring, Exhaust 19 12405 Spark Plug 20 6269 Camshaft Thrust Plate 21 — Camshaft Thrust Plate Bolt (2 Req'd) 22 — Cup Plug 23 6B273 Camshaft Oil Flow Control Rod 24 6K292 Camshaft Front Seal 25 6256 Camshaft Sprocket 26 6278 Camshaft Sprocket Washer 27 6K252 Camshaft Sprocket Retaining Bolt 28 6L269 Camshaft Sprocket Key (5 x 18) 29 6250 Camshaft 30 6051 Head Gasket 31 6A008 Cylinder Head to Block Dowel 32 6010 Cylinder Block 33 6507 Intake Valve 34 6505 Exhaust Valve 35 6049 Cylinder Head 36 — Intake Manifold Stud (7 Req'd) 37 17A084 Engine Lifting Eye 38 — Engine Lifting Eye Bolt (2 Req'd) 39 9439 Intake Manifold Gasket 40 — Bolt 41 9723 Accelerator Cable Bracket 42 9424 Intake Manifold 43 — Intake Manifold Nut (7 Req'd) 44 9D476 EGR Valve Gasket 45 — Exhaust Gas Recirculation (EGR) Valve Bolt (2 Req'd) 46 9D475 EGR Valve 47 — Fuel Injection Supply Manifold Bolt
(2 Req'd) 48 9F593 Fuel Injector 49 9D930 Fuel Charging Wiring 50 6786 Oil Level Indicator Tube Bracket 51 — Oil Level Indicator Tube Bracket Bolt 52 6754 Oil Level Indicator Tube 53 6750 Oil Level Dipstick 54 9D280 Fuel Injection Supply Manifold 55 — Vacuum Fitting 56 9E498 Main Emission Vacuum Control Connector 57 — Vacuum Tap 58 — Vacuum Hose 59 9B989 Throttle Position Sensor 60 — Screw and Washer 61 9F782 Throttle Position Sensor Gasket 62 — Throttle Body Bolt (4 Req'd) 63 — Idle Air Control (IAC) Valve Bolt
(2 Req'd) 64 9F715 Idle Air Control Valve 65 9F670 Idle Air Control Gasket 66 9E926 Throttle Body 67 9E936 Throttle Body Gasket 68 — Vacuum Fitting 69 — Camshaft Position Sensor Screw 70 6B288 Camshaft Position Sensor 71 8255 Water Hose Connection Gasket 72 — Water Hose Connection Bolt (3 Req'd) 73 8592 Water Hose Connection 74 8575 Water Thermostat 75 6065 Cylinder Head Bolts 76 6500 Valve Tappet 77 6K512 Valve Tappet Guide Plate 78 6564 Rocker Arm 79 6A528 Rocker Arm Seat 80 6A527 Rocker Arm Bolt (8 Req'd) 81 — Ignition Coil Mounting Bracket Bolt
(3 Req'd) 82 18827 Noise Filter Condenser 83 — Ignition Coil Mounting Bolt (4 Req'd) 84 12259 Spark Plug Wire Set 85 12029 Ignition Coil 86 12043 Ignition Coil Mounting Bracket A — Tighten to 5-12 Nm (4-9 Lb-Ft) B — Tighten to 5-7 Nm (3-5 Lb-Ft) C — Tighten to 21-26 Nm (16-19 Lb-Ft) D — Tighten to 2-10 Nm (1.5-7 Lb-Ft) E — Tighten to 8-13 Nm (6-9 Lb-Ft) F — Tighten to 40-55 Nm (30-41 Lb-Ft) G — Tighten to 16-20 Nm (12-15 Lb-Ft) H — Tighten to 20-30 Nm (15-22 Lb-Ft) I — Tighten to 8-10 Nm (6-8 Lb-Ft) J — Tighten to 8-11 Nm (6-9 Lb-Ft) K — Tighten to 23-30 Nm (17-22 Lb-Ft) L — Tighten to 20-40 Nm (15-30 Lb-Ft) M — Tighten to 4.5-7 Nm (3-5 Lb-Ft) N — Tighten to 18-26 Nm (13-19 Lb-Ft)

Feb 24, 2009 | 1995 Ford Escort

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