My 94 gmc has been dying on a cold start and idling funny here recently

Asked by Jan 17, 2016 at 06:05 PM about the 1994 GMC Sierra 1500 C1500 SL Standard Cab LB

Question type: General

The truck has 156k on motor my battery is old and needs a new one iv put new
ac Delco rapid fire platinums and wires in it 3 year old water pump

7 Answers

It has the 5.0 tbi

42,815

Idle Air Control Sensor, looking at the front of the motor, it is on the left side corner of the TBI. I would take the TBI off and take that sensor out and clean that port out good along with the hole TBI. I have also seen the base gasket be bad for the TBI. I would put in a new sensor, since that port is a major source of vacuum. Check and snug up the bolts for the intake manifold also.

2 out of 2 people think this is helpful.

Ok sweet thnx for the knowledge

Note it only idles jump for bout 5mn after that it's smooth as always

42,815

That is just a start, if what I suggested doesn't fix your problem the next thing to check would be the fuel pressure. There may be a bad fuel pump or a weak fuel regulator in the TBI.

2 out of 2 people think this is helpful.
42,815

Cleaning and the IAC then...Check intake bolts.

2 out of 2 people think this is helpful.

Ok I also put a new fuel pump in bout a year ago then come to find out it was a fuse lbs

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