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I have a 1988 Chevy Full size blazer. It has a 350 5.7 that is brand new crate motor. I have the TBI system on it. Here's what it's doing. I start the truck Idles fine (I changed the IAC and the TPS) bring up the RPM's to around 2000 and hold it for a few seconds and it start back firing and popping. It seems like it's running out of fuel and leaning it self out. I put a new fuel pump in last year so i believe it has decent fuel pressure (although I don't know this cause i don't have a gauge on it.) But, Assuming that the pressure is good, what else could be the problem? Fuel Regulator in the TBI? Would this cause a lean condition. It also seems that is has less power then it should have.
What else can I help you with?
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