1990 GMC S15 4 cyl Two Wheel Drive Manual 19,000 miles
1990 GM S15 2.5L TBI 700 Manual
Engine rebuilt 8 mo ago and running good until now.
herky jerky under regular driving, loss of power, porpoising, erratic idle
grounded the OBD1 ground wire A and turned distributor. Vehicle ran well for 10 mintues or so.
Seemed like a new truck.
Shut down and came back 2 days later.
Vehicle wouldnt hardly start and went back to same as issue above.
cleaned gas tank and replaced fuel
new Plug Wires
replaced TBI gasket
Next item to do
Use timing light and lock down distributor
Any suggestions are appreciated.
What should I do if the setting of the timing doesnt correct the issue.
I appreciate help.
Is there somethign the ECM could lose causing this?
Monday, March 15th, 2010 AT 6:20 PM