I am working on a 94 Buick park avenue ultra, 3. 8 superchrged.
the car has a hesatation at about 3300 rpm and above
runs perfectly under 3000rpm
to make things even worse, the vibration dampener was broken causing all kinds of noise
I replaced that and all is quiet
This is where we are now. . . . .
I am using an otc genisys which is giving me the (p1640 code, QDM error), with possible causes being
evap circuit-
cooling fan circuit-
boost control solenoid-
pcm wiring. . . . .
Now those are from the fast fixes and common overlooked items. .
Has any of you all had QDM error and what did you find?
I am all over the board with this, just need a solid answer. . .
thank you
the car has a hesatation at about 3300 rpm and above
runs perfectly under 3000rpm
to make things even worse, the vibration dampener was broken causing all kinds of noise
I replaced that and all is quiet
This is where we are now. . . . .
I am using an otc genisys which is giving me the (p1640 code, QDM error), with possible causes being
evap circuit-
cooling fan circuit-
boost control solenoid-
pcm wiring. . . . .
Now those are from the fast fixes and common overlooked items. .
Has any of you all had QDM error and what did you find?
I am all over the board with this, just need a solid answer. . .
thank you