Quote:
Originally Posted by Kgal59
My husband's 97 Blazer is having problems. It suddenly started running rough last weekend during the heat, then wouldn't start (had to get it towed home). Now we can only start it with starting fluid. After we start it and leave it in park, if you slowly apply the gas it will rev up fine, but if you hit the gas fast, it sputters and bogs and backfires, like it's either missing or not getting enough fuel. Also, while in park, the speedometer will move slightly as you apply the gas, even though it isn't moving. Fuel pressure is good, replaced the computer and spark plugs, tested ignition control module and fuel intake sensor, and exhaust line for any blockage. If we start it, then take off the air intake, the engine sputters and dies. Are there any sensors or other parts known to be problematic with 97 Blazers that we should check into? Anything else we should check? It has about 140k miles, it's a 4WD with auto tranny. Any suggestions are appreciated.
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If your ignition module tested OK, Then I would look at your Fuel Pressure. Post back your Fuel Pressure reading on Ignition on, then while engine running. The problem your incountering really sounds like your fuel pump is not delivering the right amount of pressure. Or possibly you have a plugged fuel filter. In either case. your fuel pressure reading will tell alot.