High Idle Speed issue (Pacifica 2005 3.5L)
Hi to all! I urgently need your help. I replaced the spark plugs on my Chrysler Pacifica 2005 3.5 L. After that, I tried to start the car. It started up but with very high idle speed. After a couple of seconds, the car turned itself off. Every time I start the car, this problem repeats. All hoses checked and bolts spun. Any idea? Maybe I damaged the sensors?
Thanks a lot in advance Alex |
There is a Mass Airflow Sensor mounted on the black rubber air intake tube. It can be easily damaged (or left out) when doing the plugs on a 3.5. Can you verify MAF sensor is in place and functional?
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Originally Posted by djetelina
(Post 109194)
There is a Mass Airflow Sensor mounted on the black rubber air intake tube. It can be easily damaged (or left out) when doing the plugs on a 3.5. Can you verify MAF sensor is in place and functional?
but I figured out that U have a bad vacuum leak where egr tube goes into upper intake... missing gasket. https://cimg4.ibsrv.net/gimg/www.chr...905693d4f.jpeg |
Originally Posted by amivo
(Post 109195)
I am not sure.. but I figured out that U have a bad vacuum leak where egr tube goes into upper intake... missing gasket. https://cimg4.ibsrv.net/gimg/www.chr...905693d4f.jpeg |
Originally Posted by amivo
(Post 109196)
Sorry. I have:) |
Originally Posted by djetelina
(Post 109199)
Yes, the missing EGR gasket could do it. Either that or the MAF sensor leaking vacuum, causing the engine to rev up...
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Originally Posted by djetelina
(Post 109199)
Yes, the missing EGR gasket could do it. Either that or the MAF sensor leaking vacuum, causing the engine to rev up...
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Originally Posted by djetelina
(Post 109199)
Yes, the missing EGR gasket could do it. Either that or the MAF sensor leaking vacuum, causing the engine to rev up...
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Not sure at this point. May try a good scan tool to see it it is throwing any codes...
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OEM plugs or an alternative?
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You still have a vacuum leak some where. I would suggest taking the intake back off and replacing all the gaskets that you did not the first time
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With it running,spray around some acetylene gas from a cutting torch. Alternately propane works, but be careful with it so that it does not flash. When the gas is sucked in, things should slow down, identifying the leak. Just a wild thought from the 70's....
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You can get the same effect by just spraying carb cleaner around different points of the intake, without the safety risks.
When the engine starts to slow down, you found the leak. |
Alex, I have the same issue, 2004 pacifica, I removed the upper intake to check where the spark plugs are located, put it back like it was before and now, engine revs up 2 times then turns off, Did you ever figure out the issue ?
Thanks |
Its been said several times in the posts if you read them
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Alex, I solved the issue, get Auto-zone part number below and put it on the EGR tube top side. Reeving stopped and car runs great again.
FEL-PRO EGR Valve Gasket 72928, $2.69https://www.autozone.com/emission-co...87486_0?review |
Removal
Originally Posted by Henry Arredondo
(Post 113312)
Alex, I solved the issue, get Auto-zone part number below and put it on the EGR tube top side. Reeving stopped and car runs great again.
FEL-PRO EGR Valve Gasket 72928, $2.69https://www.autozone.com/emission-co...87486_0?review |
Nevermind
Scratch that. Oh straightened coat hook, how many times you have saved me
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Originally Posted by Aanslow
(Post 119950)
Scratch that. Oh straightened coat hook, how many times you have saved me
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i did manage to find the original gasket. hopefully the one orileys sold us is just stuck forever somewhere and not in the pistons. after finding the original it works fine, the one we put on was clearly smaller and didnt fit right so that is why we lost it. got sucked in when we started it apparently.
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