Originally Posted by
Sammy_Johns
Ha! Nope, kids were yellin' "PIZZA! PIZZA!" so I made a u-turn to get one and BAM!
Recently swapped in the 7747, it is marked "ASDU". Have been running with the 8746 and whatever came on it for 10 years. Mechanical is pretty tight as far as I can tell. New AC DELCO plugs, wires, cap rotor, compression is even, leak down is reasonable. fixed leaking intake gasket. 13psi. Rebuilt TB, new gasket. Just adjusted TPS to .54v it was at .7+. I had never done that on this vehicle. Probably need to clean my plugs again. They were replaced a year ago. Drivability is better than it has ever been. Running out of ideas on the idle though.
Is the idle rough or does it roll up and down?
Have you performed the IAC reset and minimum idle adjustment. I have always used the GM method that Howell outlines in their manual.
If you are having problems with decel off-idle stall and idle drop or low rollingidle, refer to Idle Air Adjustment Instructions.
Idle Air Adjustment Instructions
Before beginning adjustment, grind the throttle stop screw plug, flat anddrill into theplug to allow a T-20 Torx driver to access the screw.
1. Jumper A and B terminal of the ALDL connector.
2. Turn ignition key on, engine off.
3. Disconnect 4-pin idle air control connector from the TBI unit after waiting 30 seconds with key on, engine off.
4. Remove jumper from ALDL connector.
5. Start engine.
6. While idling, adjust throttle stop screw to increase base idle rpmas desired.
7. Turn engine off.
8. Reconnect idle air control connector.
9. This will complete the adjustment.
AC Delco copper resistor plugs?
when was the 02 last changed? Is it a Delco?
Bookmarks