I have 1989 gmc sierra 1500 sle it has been redone and now has a 350 small block with 4 speed tran. Auto ( bot this way). It cuts out while driving. Stalles while stopping, and idling. So far I replace IAC valve, ICM, Distributor cap and rotor, and coolant temp. Sensor. Still does the same thing. Also there is a loud sucking like noise coming from the engine. While this is happening, the injectors start acting up. Some times there is a engine light sometimes there is not. While the Light is on it seems to run ok but gas crazy. I had a mechanic look it and told me it was coolant temp sensor.
So my Question is: What could be causing this problem? Thanks.
have the same problem?
Friday, November 9th, 2012 AT 10:39 PM