Question about 1997 Isuzu Trooper

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1997 isuzu trooper p300 code keeps returning

I replaced the ignition coils and spark plugs. fuel pressure is good. removed plenum and checked gasket and injectors.ok cleaned egr system. compression is good. sometimes code p305 comes but nothing is wrong with plug. replaced o2 sensors and ecm. need help $700 in the hole already

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edgardomaldo

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1997 isizu trooper when starting sometime the idle runs very high then come down and sometime the car stop run when you remove you foot from the gas paddle it ilde so low that its shut off

Posted on Jul 04, 2011

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Did you unplug the battery when the work was been done allowing the car main cpu system to reset itself if not u may have to go to a dealer of your car to have them reset cuz car computer doesent know work was done

Posted on Jun 05, 2009

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P0303 Flashing Service Engine Light when driving


P0303 ignition misfire on cylinder #3.
Possible Causes:

1.Fuel injectors, related wiring, sensors, computer issues
2. Running out of gas, or poor fuel quality
3. Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
4. Incorrect Fuel Pressure
5. EGR system concerns: leaking EGR valve or restricted ports
6.Base engine concerns: low compression, valve train problems and timing issues
7. Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

You will have diagnose each element until you find root cause.
And it could be more than one element faulting out.
You

Jan 27, 2015 | 2002 Nissan Pathfinder

1 Answer

Engine misfire acura 01 mdx


Check out the fuel pressure and fuel flow. There is a filter basket in the injector ,just in side the where the fuel line connects ,it can be removed with a small self taping screw , take care not to damage it. also check the injector spray and volume of fuel injected over a given time.

Nov 30, 2014 | Acura Cars & Trucks

1 Answer

What will cause a 1990 geo storm sohc to run rough or not start? Changed, plugs, wires,cap, rotor?


Except for the ignition coil, that about takes care of the secondary ignition system. You should check to see if you have a good strong blue spark at one of the spark plug wires. If no spark, check the coil and the crank position sensor for one place to start, also the ignition control module. If you do have spark, the ignition should be good, and then you could concentrate elsewhere.
If there is a schrader valve on top of the engine-a fuel pressure test port-it would be easy to check fuel pressure. Autozone and others loan a fuel pressure tester. Possibly, a 1990 Storm may require a temporary "tee fitting" in the fuel line somewhere to test pressure. Look for the test port- it may have a cap that unscrews. It would be located in the fuel rail or the line to the injectors.

Beyond that, other problems could be dirty injectors, a malfunctioning EGR valve, a large intake manifold gasket leak, or worst case, a mechanical internal problem. If it gets to that, perform a compression test. If you have good compression in all cylinders, it should be good internally.

Nov 04, 2014 | 1990 Geo Storm

2 Answers

My '98 Catera needs the #1 cyl ignition coil replaced,plus the valve cover gaskets.Is all of this readily accessible when the air cleaner is removed?Or,more importantly,how many components must be...


Not easy but doable. I would mark anything you aren't familiar with to get it back together right. Please let me know if you have any questions, and thanks for using FixYa.


IGNITION COIL REMOVAL & INSTALLATION
3.0L Engine
  1. Remove the wiper arms
  2. Remove the left and right side air inlet grilles
  3. Remove the wiper motor.
  4. Detach the power brake booster vacuum connection from the intake plenum.
  5. Disconnect the spark plug wiring harness from the ignition coil.
  6. Detach the electrical connection from the ignition coil.
  7. Remove the bolts from the ignition coil, and remove the coil.

To install:
  1. Installation is the reversal of the removal procedure.
  2. Tighten the coil bolts to 71 inch lbs. 8 (Nm).
  3. Tighten the power brake booster vacuum connection until snug.

valve cover removal & installation3.0L Engine
RIGHT
  1. Disconnect the negative battery cable.
  2. Remove the intake plenum and the intake manifold.
  3. Remove the spark plug boots from the spark plugs, and then the wires from the routing retainers. Make sure they are tagged for proper installation.
  4. Remove the rocker arm cover-to-cylinder screws, the cover, and the gasket/seals. Discard the seals.


NOTE Ensure all eight sealing O-rings are accounted for. They may stick to the camshaft bearing caps or fall into the oil return journals in the cylinder head.
jturcotte_1756.gif

Fig. The location of the valve cover O-rings is shown here


jturcotte_1757.gif

Fig. The valve cover sealant application points
To install:

  1. Install new valve cover seals. Lightly coat the new seals, including O-rings, with engine oil prior to installation. The oil application will assist in holding the O-ring seals to the valve cover.
  2. Apply a thin coat of silicone sealer at the front and back of the seals.
  3. Install the valve cover to the cylinder head, and tighten the bolts to 71 inch lbs. (8 Nm).
  4. Route the spark plug wires into the retainers, and install the plug boots to the spark plugs.
  5. Replace the intake manifold and the intake plenum.
  6. Connect the negative battery cable.
LEFT
  1. Disconnect the negative battery cable.
  2. Remove the intake plenum and the intake manifold.
  3. Remove the spark plug boots from the spark plugs, and then the wires from the routing retainers. Make sure they are tagged for proper installation.
  4. Remove the oil filler spout.
    1. Unlock the tab.
    2. Twist counterclockwise.

  5. Remove the rocker arm cover-to-cylinder screws, the cover, and the gasket/seals. Discard the seals.

NOTE Ensure all eight sealing O-rings are accounted for. They may stick to the camshaft bearing caps or fall into the oil return journals in the cylinder head.
To install:
  1. Install new valve cover seals. Lightly coat the new seals, including O-rings, with engine oil prior to installation. The oil application will assist in holding the O-ring seals to the valve cover.
  2. Apply a thin coat of silicone sealer at the front and back of the seals.
  3. Install the valve cover to the cylinder head, and tighten the bolts to 71 inch lbs. (8 Nm).
  4. Install the oil filler spout.
    1. Insert the spout and twist clockwise.
    2. Ensure the locking tab seats on the valve cover bolt head.

  5. Route the spark plug wires into the retainers, and install the plug boots to the spark plugs.
  6. Replace the intake manifold and the intake plenum.
  7. Connect the negative battery cable.

INTAKE MANIFOLD REMOVAL & INSTALLATION

3.0L Engine
This vehicle uses a sequential multiport fuel injected engine. Fuel injector connectors must be positioned onto their appropriate fuel injector or engine performance and exhaust emissions may be seriously affected. Fuel injector connectors are numbered to match their cylinders.
  1. Remove the intake plenum.
  2. Properly relieve the fuel system pressure.
  3. Remove the fuel supply and fuel return hose from the fuel rail.
  4. Fuel injector electrical harness connector.
  5. Remove the intake manifold bolts and the intake manifold.


NOTE Mask off the ports to the intake manifold spacer. If foreign objects enter the engine, severe damage may result.
Clean the intake manifold sealing surfaces with a non-abrasive tool or solvent.
Do not damage machined aluminum surfaces or improper sealing may occur.


jturcotte_1758.gif

Fig. Location of the guide pins for the intake plenum-3.0L engine


jturcotte_1759.gif

Fig. Intake plenum-to-intake manifold mounting


jturcotte_1760.gif

Fig. The intake manifold bolt locations
To install:

  1. Remove the masking from the intake ports.
  2. Install the intake manifold, and tighten the intake bolts to 15 ft. lbs. (20 Nm), rotating the tightening sequence.
  3. Reconnect the fuel injector electrical harness connector.
  4. Couple the fuel supply and fuel return hose,. Tighten the connection to 11 ft. lbs. (15 Nm).


NOTE Counterhold the connections to prevent damage to the fuel rail.
  1. Install the intake plenum.
  2. Connect the negative battery cable.

May 24, 2011 | 1998 Cadillac Catera

2 Answers

I have several codes on my 1998 windstar they are P0303, p0171, P0402 and P0174. Is there one or two items I can change that may resolve some or all these codes?


The 303 is a misfire, and if there's no issue with the plugs or wires, I've replace a TON of ignition coils. If you remove the coil pack and see ANY type of crack in the mold on the bottom, replace it, it's done! The 171 and 174 are typically the intake plenum seals. The plenum gasket doesn't need to be replace, but the lower seals and bolt/seal kit (the bolts that hold it on to the intake manifold) require changing.

May 17, 2011 | 1998 Ford Windstar

2 Answers

Where is the #6 electronic fuel injection plug for 1999 plymouth grand voyager 3.3 engine


3.3L & 3.8L Engines
Firing order: 1-2-3-4-5-6
Distributorless Ignition System chry-02-33-786.gif
The Driver's Side Front spark plug is the #6 cylinder.

Aug 08, 2010 | 1999 Plymouth Grand Voyager

2 Answers

Have a misfire on cylinder 3


Hello
Here is what to check let me know if you need help checking this out
most common misfire causes on the cars I've worked on have been:
  1. Spark plugs
  2. Spark plug wires
  3. Ignition coil
  4. Fuel injector
  5. Wiring to fuel injector
  6. Timing Belt
  7. Vacuum leak or stuck open EGR
  8. Contaminated fuel or bad fuel pump
  9. Weak compression
  10. Blown head gasket

Jul 14, 2010 | 1998 Dodge Durango

1 Answer

Need to replace intake manifold how do you do this


Bonneville, LeSabre, Park Avenue 2000-2005 Intake Manifold - Removal & Installation

3.8L Engine
VIN 1 Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2. Relieve the fuel system pressure.
  3. Drain the cooling system.
  4. Remove or disconnect the following:
    Negative battery cable Supercharger Thermostat housing Exhaust Gas Recirculation (EGR) tube at the intake manifold Engine Control Temperature (ECT) sensor Intake manifold
To install:
  1. Install or connect the following:
    Intake manifold with new gaskets. Torque the bolts, working from the center out, to 11 ft. lbs. (15 Nm). ECT sensor connector EGR tube to the intake manifold Thermostat housing Supercharger Negative battery cable
  2. Refill and bleed the cooling system.
  3. Run the engine and check for leaks and proper engine operation.

VIN K Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2. Disconnect the negative battery cable.
  3. Drain the cooling system.
  4. Relieve the fuel system pressure.
  5. Remove or disconnect the following:
    Fuel injector sight shield Air inlet duct Spark plug wires from the right side Manifold Absolute Pressure (MAP) sensor Vacuum lines from the intake manifold Fuel lines Fuel injector electrical connectors Fuel regulator vacuum line Fuel rail from the intake manifold Exhaust Gas Recirculation (EGR) heat shield Throttle cable bracket from the cylinder head mounting bracket and the throttle body cables Throttle body support bracket Upper intake plenum and gasket Thermostat housing Electrical connector from the Engine Coolant Temperature (ECT) sensor Drive belt tensioner assembly EGR valve outlet pipe Lower intake manifold

    a5adffa.jpg
    Fig. Exploded view of the intake manifold and related components-3.8L (VIN K) engine
To install:


140d431.jpg
Fig. Upper intake manifold torque sequence-3.8L (VIN K) engine


4950e4f.jpg
Fig. Lower intake manifold torque sequence-3.8L (VIN K) engine
  1. Install or connect the following:
    Intake manifold using new manifold gaskets. Torque the bolts in sequence to 11 ft. lbs. (15 Nm); then, re-torque to 11 ft. lbs. (15 Nm). EGR valve outlet pipe Drive belt tensioner assembly. Torque the tensioner bolts to 37 ft. lbs. (50 Nm). Electrical connector to the ECT sensor Thermostat housing Upper intake plenum. Torque the intake plenum bolts to 88 inch. lbs. (10 Nm). Throttle body support bracket Throttle cable bracket to the cylinder head mounting bracket and the cables to the throttle body lever EGR heat shield Fuel rail. Torque the fuel rail bolts to 88 inch. lbs. (10 Nm). Fuel lines Fuel regulator vacuum line Fuel injector electrical connectors Vacuum lines to the intake manifold MAP sensor Spark plug wires Fuel injector sight shield and air inlet duct Negative battery cable
  2. Refill and bleed the cooling system.
  3. Run the engine and check for leaks and proper engine operation.

Hope this help (remember rated this).

May 17, 2010 | 2001 Pontiac Bonneville

2 Answers

1999 Ford Taurus mechanical problem


Hello,
your problem appears to be the idle control motor located on the air intake manifold it is a small motor that goes bad quite often. Other items that can cause this is a bad /clogged air filter or a tune up (spark plugs and wires), or clogged fuel injectors. to clean the injectors you can buy a container of fuel system cleaner and pour it into the gas tank and as you drive it cleans the system.

Once the fuel system is cleaned via a tankful of cleaner & gas then the idle controller motor would be next on the list to be replaced.

Good Luck !
Rich Lilja

Dec 03, 2008 | 1999 Ford Taurus

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