Thread: 04 gtp cylinder #3 missfire

well the engine is 2,700 alone, plus water pump, upper gaskets, fix tranny, and control arms, hes only charging 500 for all labor. just looked at a guys question in noob section he is havin same issue i am, and had heads redone, and tune up ecm tested,switched coils,and wires. He is still havin the problem its missing and low on compression. So now not sure what to do if i stick all that into it, fire a new engine up and its missing i will prob have 2 go to the nut house!! So now im at a total loss for what i should do this other guy has done what i was about to do and what i have already done????????

ya i no they run forever if taken care of with a used one you dont know how it was taken care of, and all of the ones i saw that i would be interested in were 1,700-2,000 so for a few hundred more i get a new one with 3 yr warranty. But now like i saidnot sure what to do, this guy had his heads redone, im sure they would have at least loooked at the pistons before they put it together, and he is still havin the issue. Missin on 3 and low compression on 5 mine is on 3 and 4 so a little dif, but pretty much the same. I will see if he has a camera or whatever to stick in there and take a peek, but thinkin about the leak down test, but is that gonna nail it down to the exact problem? After readin that guys post i am really nervous that were not lookin in the right place, would mass airflow cause this? someone said maybe.. or vaccum lines, shouldnt cause loss in compession though right??

ok guys, now figure this one out. My dad and i did some checking on our own yesterday, and this is what we found. Compression on the 2 cylinders that were supposed to be low which was 3 and 4 was 145, so that is fine so no engine problems. Not sure how the shop figured it was low, We checked it four times had same result each time. checked ecm, coils, plugs and wires. ALL ARE WORKING fine and firing every time. So how is it that the computer shows a miss on 3 and can clearly hear a miss and feel it, and one shop says im low on compression when all checks out good??????????????? any ideas on this?????? What else could it be??????

Ya my dad and i are gonna do another compression test and a leak down this wknd. Just to try and find out what it is for sure. I got on it kinda hard tonight, and it seemed like the tranny slipped a little going into second, so not sure what to think about that now either. he said he thought it shifted kinda funny, but i dont really beat on it much if at all, but now wonderin if i just get that rebuilt also since its prob gonna come out, and he is gonna be takin some of it apart ne way to fix that clunk it there??

no didnt get that far. figured copression was totally fine never lost ne thing so thought all would be good internally..

not sure how to trust any shop anymore have taken it to 3 diff. ones , and all said it was certain things, and when iget it back and check it out for myself there is never anyhting wrong with what they say it is. I mean how can you tell someone that there compression is low in 2 cylinders, and they both checked out fine. Is there anyway the mass air flow could have anything to do with this, we unplugged it also yesterday and it seemed like it went from hearing it come out the exhaust from 10 ft away to having to kneel down right nxt to it to hear it. Is that even possible??

I didnt do ne switching of wires or plugs, but the dealer said they did that. So who knows prob gotta do that myself too.. So i need a computer to notice if it follows the plug or wire so dors a place let u use one or how do i do that? or do i have to take it in and tell them to do it?

yes i do to now ya thats all they say start here or try this. Then when i do it myself and ask them for a refund of the money i stuck into it the excuse is. We didnt do the work so we cant refund it!!!!!!!!!! what a bunch of BS......

my neighbor has a good one was about 500 bucks, but doesnt show each cylinder and how its runnin, just says cyl missfire. So must need a better one than that, and thats alot to spend. If i need one that bad i will get rid of the car i just need a dependable daily driver not all these headaches, im hoping to get this fixed and b done with it for a very long time..

his code reader did say random missfire i do remember him sayin that.. We did take all wires off and put them back on when we were checking the spark the little tool my dad has that you hook in the wire between either the coil and wire or wire and plug, all showed good. I and a couple other ppl around here think that might be electric problem, because we have noticed while lookin at it the last couple days that seems like all the wiring has been tampered with all is exposed, or has electrical tape on it, which obviously isnt normal. The plugs and wires seem to be firing totally fine according to that tool. Coils are nice and clean, and sending good spark. so were gonna go through some of the wiring on it and see if its shorting somewhere maybe injector wires, or who knows. They are all exposed and hitting metal stuff that could be shorting it or somethin. wiring is just a total mess under there, have looked at it many times just never noticed how messed up it looks. So i will keep in touch. Ne more ideas are welcome, bc the jack arses around here that charge the big bucks cant do it. I will do what i can get done with the last few suggestions b4 the wknd , bc sat. its oing in and isnt leavin till its runnin like its supposed to.....