2002 mdx stalls when idling at a red light - Acura MDX Forum : Acura MDX SUV Forums
 
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post #1 of 7 (permalink) Old 07-24-2018 Thread Starter
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2002 mdx stalls when idling at a red light

2002 mdx 128000 miles, adjusted valves twice, replaced IAC, cleaned complete intake and plenum, new spark plugs, new fuel pump, cleaned egr valve, could check out fine according to Acura dealer. They wanted to charge me 900 for a valve adjustment to start. They pulled p0300-p0306 (random multi misfire to include misfire on all cylinders). Drove from NM to TX and back and went through 4+ quarts of oil but isn't smoking. Not sure what do do next.

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post #2 of 7 (permalink) Old 07-24-2018 Thread Starter
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I meant to say could check out fine not could.
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post #3 of 7 (permalink) Old 07-25-2018
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What does it sound like running in the driveway. What lights are displayed on the dash if any. Do you have your own OBD2 scanner to pull codes for your self? It sounds asthough it might be a coil pack issue but i would expect check engine light shaw awd syst light to be on also.
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post #4 of 7 (permalink) Old 07-25-2018
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I personally would perform a compression test before spending more money.
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post #5 of 7 (permalink) Old 07-25-2018
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This will get you started and looking in the correct direction!
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post #6 of 7 (permalink) Old 07-25-2018
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Try this again with link: https://repairpal.com/OBD-II-Code-P0300
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post #7 of 7 (permalink) Old 07-26-2018
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How does it idle before full warmup and how does it idle after being fully warmed up?
I did not see you mentioning the cleaning of the Throttle body & Throttle blade.

To clean the throttle body/plate
1) Park the car and turn off fully
2) turn the ignition to ACC 2 position and place a cargo bar (extendable bar that pickup owners use) to push and hold the gas pedal down. (Move the DR seat forward to wedge the extendable bar between the gas pedal and the seat)
3) remove the air cleaner box and the tubing from the Throttle body.
4) careful not to break any connectors from the MAF sensor
5) you will notice the throttle plate clocked horizontal and a faint buzzing sound
6) use a Throttle body cleaner and a nylon bristly brush to agitate and loosen the built up soot/deposit from the plate edge and throttle body surface.
7) ensure that they are cleaned properly and turn off the vehicle and let it sit for 30 minutes
8) during the 30 minutes of rest, unplug the throttle body harness, spray with an electric terminal cleaner spray (or WD40) and let it sit for 20 minutes
9) apply some dielectric grease on the harness and connect it back to the throttle body
10) put everything together and turn on the vehicle and let it idle back to normal operating temps.

My ridgeline had similar issue and cleaning the TB fixed that issue. it has been problem free for the last 2 months and we drive around 2200 miles a month.
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