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I changed out the torque converter in my truck last week and now I have random misfires. I have cleaned the MAF and that didnt help. I changed out the spark plugs and that didnt help either. I put some injector cleaner in it and so far nothing has changed. I took it to the Chevy dealer and they put it on their machine and all it told them was that my truck ahd random misfires adn they couldnt pin point a cylinder. What it does is when I brake stall it the stall only goes up to 2500 where it should be close to 3200 since its a 3400 stall. When I left off the brake and punch it it will cut out and pop and back fire all the way through first gear and I don try it any further through second. Now if I punch it from like a 35 roll and it drops down into the higher rpms it wont cut out and run fine and pull hard to the shift point and pull hard through 2nd but through second it may have a couple of little backfires or misfires whatever you want ot call it. When this is happening the power is greatly reduced but when it clears up it runs like normal. When Im not flooring it it drives fine and the tc locks up and everything. The battery was dead on the truck due to sitting for about a week so i didnt disconnect the battery when I did the transmission stuff. I dont know if sometihn was damaged or what. Could it be a fuse of some sort? If so where and which one? Any help would be greatly appreciated. The fuel pressure is fine too the fuel pressure gauge shows 58 at WOT.
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sounds as though a ground is not hooked up. you just did a verter install right. i would seem to think it was a wire not hooked up or something simple. if it is a random missfire then it seems to be all cylinders at one time or another. if it were a bad plug it would have nailed down that cylinder.i suppose it could be the verter but that seems far fetched. man other than that i dont know. there are so many places to start. and i dont think it will stall up to what it is suppose to if it is missfiring. either that or the verter is having issues.
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Hrmm...have you filled up since the install. Reason I ask is because My truck was doing the same thing after I got bad gas (water in the gas) one time but it knocked out a purge soleniod or some thing like that. They replace the purge hose and cleaned the injectors and viola no more problems. I think water got trapped in the fuel rail or something. Mine would do it randomly though and I'd get mad and punch it and it would sputter and buck like a mule then take off like a bat outta hell when it finally cleared, usually in a couple of secs...
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I got some nice thick ground wire from work today and Im going to make my own ground for the engine and see if that works. I havent filled up since the swap its low fuel right now Im going to go fill up in a bit. Where is this hose you speak of Storm?
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i had it and plug wires was my prob.
also bad gas, bad plug wires(my next guess), bad ground, but could it be a tq management deal for soem reason?
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I think it's the EVAP canister purge line, just look at the diagram under the hood on the radiator cover and you should see it....
