Van backfires when trying to accelerate suddenly.

JASONPIERCE

MEMBER
2002 CHRYSLER TOWN AND COUNTRY
168,000 MILES

I changed the plugs and wires and even the iginition coil. Don't know what else to do. But it backfires at the motor so makes me think something with the fuel supply. When you put your foot in it it starts to backfire and surgeing and then comes around. Other than that it runs fine. So didn't know if should try changing the fuel filter.

5 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Check fuel pressure.

Could be running very lean from map sensor as well.
Is the check engine light on?

Roy

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Friday, September 28th, 2012 AT 6:32 PM

JASONPIERCE

MEMBER
4 POSTS

Yes check engine light on. Gave me misfire on cylinder 1. I checked the plug and the wire and they were fine. Also gave me an inlet air temp high as well. Would that have anything to do with it?

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Friday, September 28th, 2012 AT 6:37 PM

JASONPIERCE

MEMBER
4 POSTS

So even if I read the codes and it dosen't say anything about the map sensor it could still be bad? I just don't want to keep buying parts every other day to try to fix it. It's toss up between fuel filter or fuel pump. Unless it is this sensor. I don't have the tools or guages to measure the fuel pressure either. So I am at a lost on what else to do or pursue

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Friday, September 28th, 2012 AT 7:10 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

You can rent the parts from a parts store

you need to resolve the missfire code. Could be low compression, vacuum leak, plug, wire or coil. Looking at the plug you cannot tell anything.
It is best not to replace anything till you determine the failure. Guessing is expensive and most of the time wrong

Roy

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Friday, September 28th, 2012 AT 8:02 PM

JASONPIERCE