Blazer was running fine then when on the highway the engine sputtered and had to pump the gas pedal to get a couple blocks off the highway. Car would start then die after running rough for a couple min. Replaces IAC, PCV and cleaned the EGR. Would run but when I pump the gas the engine will start to die unless I let off the gas pedal.
I agree with Peter on this one. Sounds like low fuel pressure. First thing is to be sure that you have around 55-60 psi when you turn the key on and running should be around 55. If the pressure drops much below these no.'s the fuel pump may need to be changed. Don't forget to check and/or change the fuel filter also.
Did this work? having the same problems??
Sounds like you need to change your fuel filter or you may need a new fuel pump relay
I replaced the fuel pump and filter 9 months ago and the TPS about a year ago.
Replaced the fuel fiter and the relay, but no change. One thing that I noticed is the when I took the air intake off the engine almost died and got real rough. Any suggestions before I give up and just replace the fuel pump? It is atleast under warranty.
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SOURCE: 2000 blazer runs rough after gas tank was overfilled
there is a vapour purge line from the tank to a charcoal cannister. The line& cannister has been contaminated with liquid gas. When the engine attempts a normal purge from cannister it gets loaded with raw gas, causing rough running and cherck engine light. Replace cannister. Never over fill gas tank, especially on hot sunny days
SOURCE: 1995 chevy blazer running bad shooting an EGR code,
Hook up a fuel pressure guage. Now with the key on and engine off does the fuel pressure come up fast and hold steady at a fixed value?
SOURCE: 93 5.7 blazer, flooding, getting too much gas
you need to replace the fuel pressure regualtor underneath the plenum , ck fuel pressure if it drops suddenly after you shut the engine down suspect fuel regualtor , use to have to replace the whole spider assembly now i think you can just replace the regulator
SOURCE: I have a 2002 chevy s10 blazer it starts then dies
Have you checked out the carburetor for dirt?
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