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02 dodge caravan possible fuel injection problem

6 messages,  Last post on Oct 08, 2009 at 11:43 AM

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#1 of 6 02 dodge caravan possible fuel injection problem by jtlj Aug 31, 2009 (7:14 pm)
i own a 2002 dodge caravan with a 2.4 liter motor it is not getting fuel to the throttle body when the engine is hot it has to sit for one hour before it will restart cam and crank and oxygen sensors have been replaced fuel filter has been replaced fuel pump and fuel pump relay checked out okay asd relay checked out ok the van only has 32,000 0riginal easy miles on it i purchased it new does anybody have any idea what is wrong with it i had several mechanics work on it they are not sure how to fix the problem Replies to this message: xwesx (Aug 31, 2009 9:08 pm)
#2 of 6 Re: 02 dodge caravan possible fuel injection problem [jtlj] by xwesx Aug 31, 2009 (9:08 pm)
Replying to: jtlj (Aug 31, 2009 7:14 pm) If everything should run properly (you are getting spark, etc), perhaps try to run a hot lead directly to the fuel pump to see if the vehicle will run if you bypass the circuitry of the van...
#3 of 6 Rough idle only by maziz Oct 07, 2009 (6:42 pm)
I have a '02 dodge caravan with the 2.4L engine that idles rough with a lot of vibration at idle only. The vehicle cuts off when slowing down to a complete stop. Everything is normal once u get the car moving though. I already replaced the idle control valve with a new unit with no change. Vehicle starts up fine and drives through all gears with no vibration. Only at idle the car shakes and wants to cut off. I had to adjust the idle screw to keep it from cutting off at idle but still have a lot of vibration at idle. Vehicle has only 70k miles. Replaced idle air control valve, battery with no change. Car starts right up and car doesnt die until u come to a complete stop which leads me to believe fuel pump is working fine. Any comments will be helpful. Replies to this message: xwesx (Oct 08, 2009 8:25 am) maziz (Oct 08, 2009 11:04 am) xwesx (Oct 08, 2009 11:43 am)
#4 of 6 Re: Rough idle only [maziz] by xwesx Oct 08, 2009 (8:25 am)
Replying to: maziz (Oct 07, 2009 6:42 pm) Does it have any problems idling when you first start it... with the engine cold? Replies to this message: maziz (Oct 08, 2009 11:04 am) xwesx (Oct 08, 2009 11:43 am)
#5 of 6 Re: Rough idle only [xwesx] by maziz Oct 08, 2009 (11:04 am)
Replying to: xwesx (Oct 08, 2009 8:25 am) Same problem when cold. When starting it takes a lil while before the car to settle to normal idle speed, so the vibration is not there when u first start the car cold, until it settles into normal idle.'m while in park the idle speed is slightly higher so the vibration is not as rough than it is while it's in drive. Replies to this message: xwesx (Oct 08, 2009 11:43 am)
#6 of 6 Re: Rough idle only [maziz] by xwesx Oct 08, 2009 (11:43 am)
Replying to: maziz (Oct 08, 2009 11:04 am) I am leaning toward suspecting a mass airflow sensor (MAS) malfunction (or perhaps the element is just dirty), but that sensor is not in the loop before the engine is at operating temperature. It could also be a knock sensor acting up, but I would expect more issues than just a rough idle (pinging on hills, etc) were that the case.

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