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andyh1956 · 10-11-2018, 05:09 PM

The very 1st thing to do on ANY GM TBI engine is to cut the ground terminals offa the wires out on the manifold back to good wire, install new terminals & then fasten them to the same stud the battery ground cable goes to on the manifold. Make sure everthing is clean! Get that one ground wire OFF the thermostat housing!

10-11-2018, 05:09 PM	#6
andyh1956 Registered User Join Date: Mar 2010 Location: thomastown mississippi Posts: 1,261	Re: 1990 4.3 hesitating The very 1st thing to do on ANY GM TBI engine is to cut the ground terminals offa the wires out on the manifold back to good wire, install new terminals & then fasten them to the same stud the battery ground cable goes to on the manifold. Make sure everthing is clean! Get that one ground wire OFF the thermostat housing!