Quote:
Originally Posted by dartmouthrocks
Could really use help with 2002 Avalanche (5.3 Liter), 4WD. 99,500 Miles.
Driving great until yesterday. Died while driving about 30 mph. Lost power, may have regained briefly, then basically died. Barely able to idle. Cannot rev up. It was about 22 degrees out and thought that bad gas might have been part of the problem. Replaced fuel filter today (could not puff through). Barely idles for a few minutes. Not able to rev up. Error codes are 171 (too lean Bank one). Any ideas? Perhaps a bad fuel pump? Major vacuum leak? Anyone seen a code 171 with a bad fuel pump? (I agree -- strange no Bank 2 code). Any help much appreciated. (Got above freezing today and problem continued -- did add dry gas.)
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I would check fuel pressure for up to specs.
02 sensors and vacuumn leaks and maf sensors can cause lean running codes to.
Also Clear code and see what comes back.
Post back fuel pressure readings.