When i first start my blazer and pull out of the driveway and get on the gas it falls right on its face. It backfires and studders. After driving around for a little bit the problem goes away and it drives just fine. Ive replaced the fuel pump and fuel filter so those are both good. I changed the plugs and wires last spring. One thing i didnt change was the cap and rotor. I dont know if that would do it or not. Its a 1996 chevy blazer. Any info on what it might be or where i should start. Thanks

 

do you have any codes? it really sounds like a fuel issue to me but i could be wrong

 

Nope check engine does not come on. I do have one of those ported throttle bodys with the lighter buterfly in it.

 

could be a spider injector assembly leaking

 

Is there a way you can tell if the injector is leaking.

 

you can do a injector leak down test, but you will need a fuel pressure gauge and a injector tester. otc sells them.... http://www.otctools.com/products/fue...n_pulse_tester