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Username Post: 95 K1500 w\305 TBI EGR problem        (Topic#354511)
Posts: 8

Reg: 12-22-18
12-22-18 03:35 PM - Post#2755308    

Bad EGR valve recently replaced. Truck now bucks and backfires after it warms up. In diagnostic mode the EGR valve opens when vacuum is placed on line from TBI to egr solenoid. EGR does not open when vacuum placed on same line after engine warm. So I replaced coolant temperature sensor with Duralast sensor, still won't open and runs worse! Any ideas?


"7th Year" Gold Supporting Member
Posts: 2874
Age: 34
Loc: Utica ny
Reg: 04-13-10
12-24-18 10:36 PM - Post#2755528    
    In response to VChief101

Welcome to ChevyTalk.
I dont care for Duralast first off. MAy be just me.
Like to stick with oem or standard if oe is not available.
Is the vacuum getting supplied to the solenoid, and from the solenoid to the valve?
Is it the correct valve? There is 2 types, positive, and negative. Must match.
The fact you are saying it is running worse makes me wonder if it has the wrong valve installed.

Old School GM fan FOREVER

Edited by rockfangd on 12-24-18 10:39 PM. Reason for edit: No reason given.


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