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Aaron Weather
Dodge Dakota
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8/29/2004
19:03:05
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 Subject: too lean
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Message:
I have a 2000 R/T. Yesterday at the track I got a P0171 code. The code is for too lean a/f mix with over compensating fuel bieng added. My a/f gauge was bouncing only on the lean half. It was running like it had a huge cam, not wanting to idle, and it was smoking out the exhaust when I accelerated. I have a mopar computer, m1, 53 mm throttle body, headers, and exhaust cut out. I have run on the street with no problem, until I removed the cut-out. Could the problem be too much air going through? Need bigger injectors? Bad O2 sensor? I would appreciate any help.
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Bob Lincoln
Dodge Dakota
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8/29/2004
19:28:48
|  RE: too lean
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Look for the obvious first - vacuum leak, intake manifold gasket leaky.
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Aaron Weather
Dodge Dakota
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8/29/2004
19:56:55
| RE: too lean
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How do I check to see if it is leaking?
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matt
Dodge Dakota
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8/31/2004
22:06:50
| RE: too lean
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easy way, take one of those butane or propane torches, DONT light it, and keep a fire extinguisher handy,as a just in case, always CYA ( cover your A$$).... with the truck running, go around the intake with the torch opened up, any raises in RPM indicate a leak has been found. ( you could use starting fluid in a leaking spot, to have a more pronounced rpm jump, but start with a torch....no reason to coat the engine bay in highly flammable fluids....
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Aaron Weather
Dodge Dakota
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9/02/2004
09:14:10
| RE: too lean
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Message:
Thanks for the replies! Yesterday I replaced the gaskets on the intake manifold and was extra careful to be sure that it sealed well. I ran it and the problem haan't changed. I double checked all the ports on the manifold and throttle body and everything seemed fine. Any more help would be great!
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daddio
Dodge Dakota
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9/02/2004
10:04:06
| RE: too lean
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Message:
possibly a fuel delivery prob. have you checked fuel sys pressure? fuel pump maybe going bad, clogged pick up screen on fuel pump?
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