97 gmc pu 4.3 vortec v6, code p1406 egr valve pintle position circuit and p0101 mass air flow system performance. Idles fine but bogs down during accelleration rpms rise to 3500 struggles to reach even 25 mph. Egr valve seems to move freely after inspection any ideas?
have the same problem?
Friday, July 27th, 2007 AT 9:40 PM