Question about Infiniti I35

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2001 I30, gas pedal must be held down to set idle from cold start. My mechanic says the ECM and IAC must be replaced. I found a place that will reprogram my ECM and they say that will work but I also will need to replace the Throttle position sensor and Air intake temperature sensor. My mechanic said the sensors are fine and don't need to be replaced. What do I do?

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Hi! Used to work on one too and I agree to your second mechanic. ECM may need to be reprogrammed, throttle position sensor, air intake temperature and the MAF (mass air flow) sensor may need to be replaced. The MAF has big contribution on engine performance specially the idling. Hope this shed some light, Good luck!

Posted on May 15, 2010

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Does the IAC valve replace the cold start valve or injector on a 2000 camry v6


IAC or idle control valve would be unlikely to replace a cold start sensor or injector
run the fault codes and check for ambient temp sensor problem that is not telling the ECM to rich up the fuel mixture ( choke ) for the cold air coming in
the ECM will adjust the idle speed accordingly to the responses from the temp sensor

Dec 16, 2016 | Cars & Trucks

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Chevy Malibu 2001 with 89,000 miles idling too high during park


Back to the mechanic - sounds like either an IAC motor or TPS sensor is the problem, but also could be the throttle cable (sticking leaving the throttle not fully closed).

Jul 04, 2017 | 2001 Chevrolet Malibu

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Car: 94 Chevy caprice, 5.7L engine/port fuel injection Problem: very hard cold starts, rough idle at cold temperatures and stalling at low idle(when able to start after minutes of continuous cranking)...


Have your temp sensor checked. It may not be setting off a code but a sign of a failing temp sensor is hard starts, rough idle, until the car heats up. It sends a code to the ECM to help adjust fuel mixture. If it sends gals readings, the computer will adjust the fuel-air ratio and cause vehicle to run too lean until warmed up. Some people have had to keep pumping the gas pedal to keep it going from a bad temp sensor.

Oct 14, 2017 | Cars & Trucks

1 Answer

Horrible Random misfire in car


This is common issue with Infiniti I30 1999-2001.

When the coil packs fail they burn up components/parts on the engine computer ECU. If the problem gets worse, you will need to replace the ECU or have it rebuilt.

Is your check engine light on?
You might also get code P0505
Technical bulletin also recommends to replace
The Idle Air Control Valve MUST be replaced prior to re-installation of the ECM, or immediate damage to the computer will occur again.

http://www.myairbags.com/product/ecu-infiniti-i30-2000-2001
Common Failures:
  • No Start, Hard Start, Engine Stalls
  • Rough Idle, High Idle, or Idle Up and Down
  • Misfire to one or more cylinders
  • No signal to the ignition coils
  • Engine Trouble Codes For Idle Control Valve (IACV)
  • No Communication With Computer
  • Replacing IAC Does Not Fix The Problem

Jul 24, 2017 | Infiniti Cars & Trucks

2 Answers

I have 1999Chevy suburban with 6.5 turbo diesel motor.it idles up and down and when driving the gas pedal is real touchy Wat is the problem and were do i locate the problem


Check the help links related to this problem.Click the link below to go through its troubleshooting procedure :-----Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html---------
Car won't start without hitting the gas pedal? http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-without-hitting-gas.html
-------Complete loss of brake pedal then all gets normal? http://repairhelpcenter.blogspot.com/2012/01/complete-loss-of-brake-pedal-then-all.html
------Car dies when gas pedal is pressed? http://schematicsdiagram.blogspot.com/2011/12/car-dies-when-gas-pedal-is-pressed.html
--------Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down?

http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html

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After replacing brake rotors and pads, brake pedal remains on floor? http://technoanswers.blogspot.in/2012/02/after-replacing-brake-rotors-and-pads.html

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accelerator pedal sensor? http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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For rough idle issues and problem troubleshooting,go through the help links provided below :----- van idles rough?

http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html

---------
will not idle when cold?

http://technoanswers.blogspot.in/2012/02/ford-explorer-40-will-not-idle-when.html

----------
runs lean and idles rough?

http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html

-----------
Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

------------
Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

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Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

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Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

------------
Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

------
While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

This will help.

Thanks.

Mar 01, 2012 | 1999 GMC Suburban

1 Answer

2001 Dodge Ram will start and then immediately die. I then have to pump the gas pedal a few times and then it starts. However I have to keep giving it some gas to keep it going. When I have to stop at a...


clean the idle air control valve. This thing controls your idle speed but gets gummed up with deposits. buy a can of spray carb cleaner and maybe a cheap set of torx L wrenches if you dont have any. remove IAC and clean valve and bore with paper towels and carb cleaner. Also use some of that carb cleaner to clean the throttle bore and plate using an old toothbrush and towels. and lastly replace the PCV valve. Your truck will now idle like it just came off the showroom floor!

Jan 07, 2011 | 2001 Dodge Ram 1500 Truck 2WD

1 Answer

Idled high, replace IAC and PCV, now idles low and stalls


On modern day cars the parts that get fitted need to be adapted to the ECM using a decent diagnostic machine. I bet that this was not done and the car is now suffering as a result.
Something to try is resetting the ECU, simply disconnect battery for 10 minutes, reconnect, then start car from cold *without touching gas pedal* and leave idling until the rad fan comes on (this resets all the base idle settings) then take it for a drive - hopefully will solve the problem

Nov 18, 2009 | 1990 Dodge Caravan

2 Answers

Car stalls when you let off the gas when warm or idling


sounds like your IAC (idle air control valve) located on the throttle body towards the front of the engine held in by 2 torx screws. the iac controls the idle if the car when your not on the gas. i will post the steps to clean the iac and the passages that the iac goes into.

1. disconnect the iac connector
2. remove the iac
3 clean the iac pintle valve and check for wear
4. clean the passages that the pintle valve sits in (usually carbon build-up in there, you may need to remove the air intake tube and air filter box to get to the passages in the throttlebody)
5. if the iac looks ok and the passages are cleaned re-install and put everything back
6. start car and see if it idles like normal when warmed up. you may need to give it a few tries for the iac to re-learn its proper position so give it a few warmup cycles
7. if it still stalls check for proper operation of the iac via ohming out the connectors (if you look it up on google you will find the specs at which the iac is supposed to operate)
8. if the iac is working properly, check for vacuum leaks on the intake manifold and vacuum lines.
9. if no vacuum leaks are present and the iac id working properly after cleaning have a shop check the ecm (engine control module) for a bad circuit board, i've seen that haoppen as well

hope this helps!

Feb 16, 2009 | 2000 Pontiac Grand Am GT

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