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ok guys another prob. i got a low rpm miss in first and second gear and third. misses like sputtering at 2500-3500 rpm, when i stomp it the missing stops. then wehn im cruisin at 55-70 in OD it does it slightly. i changed fuel filter, wirtes and plugs. i put stock autolites in it that are crap. could plugs be causing a miss? or reg grade gas and crappy plugs? its all stock otehr than gutted cats and flows.
sounds like dirty or clogged injectors, run some fuel system cleaner through the tank and see if that helps. You can use Seafoam in the tank also, thats always worked as a good injector cleaner to me.
Chris
put seafoam in the gas tank or a vacum line
i hate reg gas......
A free flowing exhaust will cause you problems with a stock tune. I am surprised you don't get convertor inefficiency errors being reported to the PCM since your cats are gutted. Time for your first tune, maybe. Definitely do the Seafoam through a tank of fuel. Worst comes to worst you may have a coil going out or a short in a power wire going to the coil.
my SES light is on due to the gutted cats. I dunno wut it is but i want it fixed.
You're running lean man. That happens when you gut your cats and add a free flowing exhaust or run low fuel pressure. You're going to have to get that fixed before long. It's hard on the engine to run lean, burns stuff up. I'm not 100% sure it's causing your miss but I'm sure it has something to do with it. Running lean too long is as bad as a burned valve, it will eventually cost ya.
:imwstupid:
well changed cap, rorotr button, checked all plug n wires. still does it. the part wehre cap scres in to dist is cracked but on outside front. we hooked on scan tool and drove it till it missed and it said cyl 1 misfire, then we swapped wire 1 with wire 2(cyl i mean) and then 2 6 and 3 missed. whast the poroblem? its makin me mad! all help appreciated.
Maybe the coil is shorting out? They'll do that before they finally crap out. With the lights out, in the dark, run the engine and watch for halo blue light being emitted around the ignition coil.
coil aint doing that. they are valuecraft wires and autolite plugs. should i get bigger wries from msd and betetr plugs? IT did this miss before i changled all this stuff. could the motor be about ready tot ake a shit on me?
I've got a 97 Astro Vortec V6 and it has problems pretty much the same as yours. I've replaced just about everything in the engine short of the injectors. It runs like a top but bucks every now and then. Good luck with your search for a solution, short of going to a mechanic and having them put it on a scope. I will be doing that myself one of these days when it finally pukes on me.