2005 Grand am 3.4 v6
So my Grand Am has 160,000 miles on it I have changed the plugs ,wires ,coils runs great at high speed and accelerates good too
at a stop its idles rough like its has a miss but never dies out !i dont think it has any vacuum leaks although there is one hose that
disappears into the wiring harness says it goes to the trans axle ? could it be dirty failing fuel injectors /injector ? i changed the
intake manifold gasket in 2022 any help would be nice .
Have you performed a diagnostic scan for codes and live data? That would be a good start.
@chucktobias I did tonight got a code of PO 171 fuel trim lean bank 1
@teaboy There's your problem.
got a code of PO 171 fuel trim lean bank 1
Follow these diagnostic procedures
3.4 v6
This engine is notorious for head gasket and intake gasket failure.
I changed intake manifold gasket in 2022 around June i think i bought the fel pro set 129$ at a light i do smell fumes ! but at speed not .