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post #1 of 4 (permalink) Old 03-27-2019, 08:31 AM Thread Starter
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Starts hard when warm

My 09 has an issue where if the engine is warm sometimes it will struggle to start. Any insight from anyone who has experienced something like this?
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post #2 of 4 (permalink) Old 03-27-2019, 03:23 PM
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Originally Posted by AndyMedic View Post
My 09 has an issue where if the engine is warm sometimes it will struggle to start. Any insight from anyone who has experienced something like this?
I had an '08 Jeep GC WK with the 3.7L V-6; It would have a hard time idling when warm; turned out to be a bad air intake temperature sensor, which is right by the mass-air meter.

Are you receiving any DTC's in the EVIC?


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post #3 of 4 (permalink) Old 03-28-2019, 09:33 AM Thread Starter
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Join Date: Apr 2013
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Quote:
Originally Posted by Big Blue View Post
I had an '08 Jeep GC WK with the 3.7L V-6; It would have a hard time idling when warm; turned out to be a bad air intake temperature sensor, which is right by the mass-air meter.

Are you receiving any DTC's in the EVIC?
P0507 on it right now
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post #4 of 4 (permalink) Old 03-28-2019, 12:56 PM
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Originally Posted by AndyMedic View Post
P0507 on it right now
When I went to the DTC sub-forum I saw that I had already posted this in the thread you have there - don't know if you saw it or not;

https://www.jeepcommander.com/forums...671-p0507.html

This might point you in the right direction:

https://www.obd-codes.com/p0507

This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model. Anecdotally this code seems to be more commonly found on Chevrolet, VW, Nissan, Audi, Hyundai, Honda, Mazda and Jeep vehicles. This P0507 code is one that's sometimes triggered on vehicles that have electronic throttle control. That is, they don't have a regular throttle cable from the accelerator pedal to the engine. They rely on sensors and electronics to control the throttle.

In this case, the P0507 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle speed that is greater than the desired (pre-programmed) RPM. In the case of GM vehicles (and possibly others) if the idle speed is over 200 rpm higher than expected, this code will be set.

This DTC is more of an informational code, so if there are any other codes set, diagnose them first. If there are no other codes, inspect the intake air system for air or vacuum leaks and damage. If there are no symptoms other than the DTC itself, just clear the code and see whether it returns. If you have an advanced scan tool that can interact with the car, command the idle higher and lower to see if the engine responds appropriately. Also check the PCV valve to see if it's blocked and needs to be replaced. Check the IAC (idle air controller) if equipped, verify it's operation. If available, try swapping in a new throttle body to see if that fixes the problem. On Nissan Altimas and possibly other vehicles the problem may be fixed by having the dealer perform an idle air relearn procedure, or other relearn procedures.

https://www.obd-codes.com/


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Last edited by Big Blue; 03-28-2019 at 12:58 PM.
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