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  #16  
Old 04-11-2013, 04:49 PM
servant2thekng servant2thekng is offline
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Default Re: 2.5L Idling Rough and Stalling

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Originally Posted by adamhos View Post
Check plug wires
Plugs and wires are new.
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  #17  
Old 04-21-2013, 07:08 PM
servant2thekng servant2thekng is offline
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Default Re: 2.5L Idling Rough and Stalling

I found that I did have a bad intake gasket, which I replaced. It didn't help the problem so I tried replacing the IAC valve on a whim, that didn't help either.

I'm at a loss.
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  #18  
Old 04-21-2013, 09:38 PM
stateranger stateranger is offline
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Default Re: 2.5L Idling Rough and Stalling

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Originally Posted by stateranger View Post
The ping i had was caused by tape blocking the maf which also caused one of elements on the maf to burn out..... What happens is the maf is sending the ecu an incorrect airflow reading at idle and while driving, sometimes you will get a lean code.
It will also cause rough idle and on start up the engine will run smooth.


"I found that I did have a bad intake gasket, which I replaced. It didn't help the problem so I tried replacing the IAC valve on a whim, that didn't help either".

Replace the mass air flow sensor.
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Last edited by stateranger; 04-21-2013 at 09:42 PM.
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  #19  
Old 04-24-2013, 08:26 PM
hendricksn hendricksn is offline
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Did you fix the problem yet?
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  #20  
Old 04-27-2013, 08:35 PM
servant2thekng servant2thekng is offline
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Default Re: 2.5L Idling Rough and Stalling

No not yet. I have been working 14-16 hour days for a while and haven't been able to spend time on it. I will be sure to update when I try more things or fix the problem. I'm going to do as stageranger suggests and replace the MAF the next chance I get.
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  #21  
Old 05-02-2013, 02:36 PM
servant2thekng servant2thekng is offline
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Default Re: 2.5L Idling Rough and Stalling

Ok, so I just replaced the MAF. No difference, it still won't idle correctly. The idle does seem like it smooths out more quickly. Maybe because its a warm today?

I'm grasping for straws at this point.
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  #22  
Old 05-02-2013, 08:28 PM
hendricksn hendricksn is offline
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Bump.
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  #23  
Old 05-03-2013, 03:18 PM
servant2thekng servant2thekng is offline
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Default Re: 2.5L Idling Rough and Stalling

I did a compression test.

Cylinder 1 - 180 psi
Cylinder 2 - 180 psi
Cylinder 3 - 180 psi
Cylinder 4 - 150 psi

So I probably have a bad valve on cylinder 4 but why do I have a misfire code for cylinders 1 and 2?
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  #24  
Old 05-06-2013, 07:16 PM
j4k3.sn4k3 j4k3.sn4k3 is offline
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Default Re: 2.5L Idling Rough and Stalling

I am having this same problem from what I can tell. I started today with cleaning the IAC but when I got it back together it was even worse than yesterday, it used to just idle rough now it stalls when idled. I cleaned it with throttle body cleaner, any chance I messed something up inside the IAC? or should I just keep on with the process (MAF sensor, EGR valve, etc.) I also know my air filter needs to be cleaned maybe just replaced, which I believe could make for a very dirty MAF sensor
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  #25  
Old 05-07-2013, 08:53 PM
servant2thekng servant2thekng is offline
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Default Re: 2.5L Idling Rough and Stalling

Quote:
Originally Posted by j4k3.sn4k3 View Post
I am having this same problem from what I can tell. I started today with cleaning the IAC but when I got it back together it was even worse than yesterday, it used to just idle rough now it stalls when idled. I cleaned it with throttle body cleaner, any chance I messed something up inside the IAC? or should I just keep on with the process (MAF sensor, EGR valve, etc.) I also know my air filter needs to be cleaned maybe just replaced, which I believe could make for a very dirty MAF sensor
I think I got about 11 Ohms when metering out my working IAC when disconnected. Also, your engine will stall if a working IAC is unplugged while idling. Hope this helps.

For my next step I plan on pouring a small amount of oil in the cylinder that has low compression to determine if the problem is a cracked ring or a bad vale. Hopefully your problem isn't as severe.
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  #26  
Old 05-07-2013, 09:47 PM
j4k3.sn4k3 j4k3.sn4k3 is offline
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Default Re: 2.5L Idling Rough and Stalling

yeah im going to thoroughly go over the whole air intake system to make sure everything is clean and connected, ran out of day light yesterday and got stuck working all day today. keep updating our progress if you can and good luck!
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  #27  
Old 05-08-2013, 07:03 PM
SpeedNinja SpeedNinja is offline
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Default Re: 2.5L Idling Rough and Stalling

Everything I would've suggested seems to have been done already... I think... although something seems wrong in cylinder #4. Did you check/replace the TPS?

Quote:
Originally Posted by j4k3.sn4k3 View Post
I am having this same problem from what I can tell. I started today with cleaning the IAC but when I got it back together it was even worse than yesterday, it used to just idle rough now it stalls when idled. I cleaned it with throttle body cleaner, any chance I messed something up inside the IAC? or should I just keep on with the process (MAF sensor, EGR valve, etc.) I also know my air filter needs to be cleaned maybe just replaced, which I believe could make for a very dirty MAF sensor
It is possible to damage the IAC when cleaning it. Same with the MAF.
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  #28  
Old 05-08-2013, 08:00 PM
Offy Offy is offline
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Default Re: 2.5L Idling Rough and Stalling

I hate to tell you where to waste more $ but I'm wondering if you have a timing issue. Maybe look into ignition control module (if there is 1?), crank sensor or cam sensor. Just ideas, I also do not know if there is both crank/cam sensors on this engine.
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  #29  
Old 05-09-2013, 10:33 AM
j4k3.sn4k3 j4k3.sn4k3 is offline
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Default Re: 2.5L Idling Rough and Stalling

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Originally Posted by SpeedNinja View Post
Everything I would've suggested seems to have been done already... I think... although something seems wrong in cylinder #4. Did you check/replace the TPS?


It is possible to damage the IAC when cleaning it. Same with the MAF.
yeah i think im going to pull the IAC off again and test it. My problem got way worse after i cleaned it so chances are pretty good that I damaged the part.
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  #30  
Old 05-09-2013, 11:23 AM
doshus doshus is offline
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Default Re: 2.5L Idling Rough and Stalling

Maybe you have a bad spot on the TPD where it idles? I would double check the plug wires to make sure you have them snapped on and didn't accidentally separate the wire from the boot.
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