Question about 2001 Acura MDX

1 Answer

Acura mdx misfire

#3 misfire-replace plug,coil,removed intake plenum,cleaned all passages,replaced all gaskets,adjusted valves,all injectors resistance readings are the same (.013/.014). removed injectors & flow tested,all o/k.no vacuum leaks, compression tested @ 220psi,never over heated,no blown head gasket,pulled coil,attached coil to plug,started engine to watch for spark-good spark,t belt @ 110k/present mileage 139500. removed new plug in #3- extreme lean electrode !!!!!!!-help ???????

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Acura Master
  • 2,460 Answers

Could be a fault in the #3 injector wiring, with the engine running back probe the wiring at the injector with a led trouble light it should glow at each pulse. a pulse can be felt by holding the injector if you have no light. compare with # I&2.

Posted on Nov 30, 2014

Testimonial: "not helpful,as I stated earlier,removed wire harness from injectors,(6) installed a noid light on each injector harness,cranked engine over,all injectors fire-noid light blinks on & off in sync as it should,no open circuits in harness,same with plugs & coils-all work. any other advise would be greatly appreciated. also note;can't reach injector harness with intake plenum installed. thanks for the try,Mike"

  • Stan Ford Dec 03, 2014

    Back probe with the harness connected,a bad connection may not showif circut not under load.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

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

GTI FSI misfire under load?


misfires are also cause from faulty injectors Check/replace the injector as the tip may be partially blocked.

Nov 04, 2014 | Cars & Trucks

3 Answers

Need diagram for 01 windstar 3.8L cylinder and coil terminal location


The coil pack is located on the wiper side of the engine, mounted on the rocker cover with 3 bolts. As they age, cracks form on the casing, allowing moisture and dirt to enter. This causes internal shorts and lead to misfire, causing the fouled plugs.
Remove the wiper cowl to expose it. Replace the coil pack, and replace the cables one at a time.

Oct 15, 2014 | 2001 Ford Windstar

6 Answers

Honda Accord 1994 Rough Idle, often miss cylinder 2-3 changed the distributer, the coil, spark plug, spark wire cleaned the egr valve, pcv valve, vaccum I noticed the engine miss the cylinder 2 and 3


Sounds like a dirty Throttle Body and dirty IAC (Idle Air Compensator) valve. Get some good Throttle Body cleaner remove the flexible hose at the Throttle Body spray it and wipe it very very clean an old tooth brush works good for getting in there.

Now remove the IAC from the side of the throttle body, careful with the gasket if you want to reuse it. Spray it down good inside moving the valve back and forth as you do let it soak for a few minutes and clean it again. Blow it out with some compressed air and reinstall it. Put some throttle body/injector cleaner in the fuel tank.

Keep us updated.

Oct 04, 2011 | 1994 Honda Accord

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

1 Answer

Acura mdx 2001 ingine codes p1399 andp300 as well others codes 305


All these codes indicate you have a misfire on cylinder number 5.
P1399/P0300 - Random/Multiple Cylinder Misfire Detected
P0305 - Cylinder #5 Misfire Detected

Causes:
- Improper spark plug at cylinder #5
- Insufficient compression at cylinder #5
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #5
- Fuel injector #5 may be faulty
- Intake air leak at cylinder head

Solutions:
- Perform Injector Service
- Replace Spark Plug #5
- Replace Injector #5
- Replace Ignition Coil #5

Mar 09, 2011 | Acura MDX Cars & Trucks

4 Answers

2004 Acura MDX 3.5 130,000 miles multiple missfire how do i fix ?


Hi, multiple cylinder misfire, is when the engine cylinders do not fire in the correct order, and do not do it constantly. There is no particular pattern to it. My experience with this condition is that it is usually caused by a faulty ignition coil that is beginning to burn out. It could also be bad wires pluds rotor or cap

Causes Include.
  • Faulty spark plugs or wires
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor
  • Defective computer

Possible Solution:
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
Random misfires that jump around from one cylinder to another. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Jan 11, 2011 | 2004 Acura MDX

2 Answers

My check engine light came on in my 1999 Acura CL 3.0. The diagnostic indicated EGR valve was the problem as well as misfires in cylinders 2, 4, and 5. The EGR was replaced and a tune up was given. The...


The issue is not so much to do with the EGR itself but the passage ways that lead from it. Most manufacturers bleed metered amounts of exhaust gas from the EGR into the common plenum of the inlet manifold. Honda does things differently in that they use a passage way assembly to feed the exhaust gas from the EGR into each runner of the inlet assembly close to the intake valve. Over time these passage ways become blocked with sooty carbon deposits, but not all simultaneously. This means that some cylinders run as they should and others run lean with the overall effect that the engine runs unevenly and will misfire on those cylinders to which the passage ways are blocked. Two types of exhaust gas feed systems were used, one with a removable lid and one that consisted of a complete casting with blanking plugs. You will need to access this passageway assembly, it lies beneath the fuel rail and on top of the inlet manifold; the process is quite involved for the casual DIYer. The internals of the exhaust feed assembly need to be cleaned out. Those assemblies with the removable lid (bolted on with a gasket) are pretty easy to clean out with a screwdriver, brush and carb choke cleaner spray. Those with the single cast unit with blanking plugs are much more difficult. The blanking plugs need to be removed and new ones will be needed to replace them. The best way is to drill a pilot hole in the centre of each plug and then screw a heavy duty threaded, self tapping, dome topped screw. The plug can be removed by applying leverage to the screw head. To clean the passageway use a a frayed brake cable fitted in the chuck of drill. The cable can be eased in through the plug holes and along the passage ways, the rotation imparted to the cable by the drill will loosen any obstruction. Spray liberally with carb. choke cleaner and wipe clean. Fit the new blanking plugs and tap home. Replace all the fuel rail assemble etc and the engine should be good for another 100k, no more EGR and no more misfire and no more speed restriction. Note the safe-home mode imposed by the ECU on the engine is due to the knock sensors detecting the misfire events. It is just a safety precaution to prevent any damage and will be lifted when the computer is cleared.

Aug 19, 2010 | 1997 Acura CL

3 Answers

2000 Sportage: where is the spark plugs located on a 2000 Kia Sp...


They are under the black plastic cover that is in the middle of your valve cover gasket. Remove the intake hose from the aluminum intake plenum on top of the valve cover and the silencer box against the firewall. Remove all the connectors from the sensors which should be 2 on the plenum and the 2 large vacuum hoses on the plenum. Then remove the 3 12mm bolts from the plenum at the throttle body and remove the plenum. You can reuse the throttle body gasket at the plenum so don't destroy it. All the other bolts are 10mm and use a screwdriver to loosen the clamps on the hose. The sensors have clips that you need to remove with a small screwdriver, then disconnect them. Remove the bolts on the cover and the cover. Then remove the bolts holding the coil packs down. Do one plug at a time. 2 of them are connected to the 2 plug wires and 2 are underneath the 2 coil packs. The connectors on the coil packs are fragile so remove them carefully. Reverse the steps to reinstall the plenum, etc.

May 16, 2010 | 2000 Kia Sportage

Not finding what you are looking for?
2001 Acura MDX Logo

252 people viewed this question

Ask a Question

Usually answered in minutes!

Top Acura Experts

yadayada
yadayada

Level 3 Expert

76630 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8514 Answers

Are you an Acura Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...