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Finally set P0171 V70-XC70 1998

posted by  kcarl on  Fri Oct 29 12:26 CST 2010
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last visit: Thu Aug 14 08:17 CST 2014
[RELATED]

Well, I ordered the fuel pump relay, and my daughter brought the car over for me to install it. When I got home from work I started the car to move it, and it started and ran fine, but I noticed the check engine light was on. The daughter then said the car stalled twice on the way over (hadn't stalled in a week), and as she pulled in our garage, it stumbled and the check engine light came on. One of the times it stalled with her, it took about 5 minutes to restart, but there was too much ambient noise to listen for the fuel pump.

So, I visually checked for vacuum leaks and saw nothing suspicious, then changed the plugs and pump relay I had ordered. I drove it to town and got the code pulled, which was P0171 - too lean, bank 1. Cleared the code and drove home - car ran fine over 30 miles, 3 stops and starts.

Could this have been set by a faulty fuel pump relay? Searches indicate it could be an intake leak, which I've gone over pretty well with propane and found nothing after replacing a few connectors. Fuel filter was changed 3 weeks ago. Also mentioned was a bad MAF. Should I just go ahead with replacing the MAF or dig deeper for intake leaks and fuel supply?

Thanks for listening






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