kind of a step back (maybe) April 29, 2006, 07:14:57 PM Its not for my cougar! I have a 97 F150 w/4.6l and its been missfiring and dumping gas BAD! For the last 3mos its been undrivable we have fixed all of the "normal" stuff,,,spark plugs,wires,coil packs,fuel pump/filter,fuel injectors,TIMING,intake gasket,cam poss. sensor,water temp sensor,COMPUTER ect. and then some.. we always work on our own cars but this truck has me stumped we took it to a mechanic he did a compression check, vaccume ect he had it for 3 weeks then HE took it to the FORD dealer who had it for 2weeks they reburned the computer and fixed the recalls and gave it back to us no different than when we took it in!:bs: All they said was it runs rich at idle and leans its self out, they dont know why!So here is where Im thinking about the step back..I saw a MSD controller for carburated 4.6/5.4 engines (#MSD6011) I was wondering if they sell a carb intake or if its still custom only. I have way to much $$$ in this truck trying to fix it to give up on it, this is my last resort! Quote Selected
kind of a step back (maybe) Reply #1 – April 29, 2006, 08:30:37 PM Lordy look whos still alive!!!Has the Mass Air meter been cleaned or subbed??? It's a common problem causing mixture problems... Quote Selected
kind of a step back (maybe) Reply #2 – April 29, 2006, 08:40:03 PM Like Tom said. If you are intent on carbing your 4.6 though.....http://www.sullivanperformance.com/YVS450/products/intakemanifold/intake4.6.htm Quote Selected
kind of a step back (maybe) Reply #3 – April 29, 2006, 09:16:16 PM i would clean the mass air meter with some brake clean. Quote Selected
kind of a step back (maybe) Reply #4 – May 01, 2006, 10:51:25 AM Im alive, but this truck is trying to kill me!:D I really dont want to carb it but if FORD doesnt know whats wrong with it,,,,then I think Im running out of options. We have way too much money in it to give up on it and its been cutting into my cougar money! I guess I forgot to mention we did clean the MAF and the mechanic did too but still insisted that that could be the problem so we replaced it with no luck! Everything seems to be working fine (thats what ford said too) other than the fact that the exhaust will burn your eyes and a 1/4 tank of gas will get ya out of the driveway! It has no lack of power (It actually hauls ass!) A friend was actually mad cuz he just put a bunch of work into his dackota and this truck blew him away missfiring the whole way!:giggle: I think ford programmed it for no cats and the headers ect.? I was thinking it may have some electrical gremlens? It seems to be the only thing left.OH, and F150 forums are no help at all!Thanks Paul, I was serching all day for a carb intake. Im about a week away from ordering it unless We can come up with something eles. Quote Selected
kind of a step back (maybe) Reply #5 – May 01, 2006, 11:50:53 AM Fuel pressure regulator? Quote Selected
kind of a step back (maybe) Reply #6 – May 01, 2006, 02:13:11 PM Quote from: Tbird232ciFuel pressure regulator?replaced.Heres a LITTLE background to help...Ever since we got the truck it had a little bit of a stummble, we kept replacing plugs, wires and coil packs wich seemed to work for a while. But it kept getting worse and worse to the point that any more than 1/4 throttle would kill it, so we check the fuel filter, it needed to be replaced that seemed to help it for a day then the truck died and wouldnt restart we towed it home and checked the filter again it was cloged so we droped the gas tank wich was full of dirt thanks to a hole in the filler tube:mad: so we cleaned the gas tank out fixed the hole, replaced the pump, cleaned the lines, new filter, new fuel injectors and pressure regulator so the whole system is new. started the truck.. it ran okay, still had a missfire but ran like before. It continued to get worse..... so we talked to a mechanic who said it could be a vaccume leak so we did intake gaskets and vaccume check, test drove and it was the same problem. we took it to have the engine light checked at AZ it read random multi cilinder missfire, and juming timing, but the lean problem had been solved.We had a mechanic replace a timing chain and guides,,, test drove, and it had way better throttle response but at the first stop light it stalled we started it back up and it started its same old missfire!:bs: Well we took it back to the mechanic cuz maybe he had the timing wrong but it all checked out fine. So we started on replacing sensors none of them made a difference at all, I even found that the cam pos. sensor had been unpluged, we relaced it and re connected it..the truck ran the same. That made us think the computer was bad but we replaced it and it ran exactly the same and reads the same missfire codes. Ford says it runs rich at idle then leans its self out but its not a lean missfire (anymore) they checked the fuel system, ignition system and reburned the computer cilinders 1&4 seem to be causing most of the missfire. But they said everything on the truck is working as it should and they had it on there diegnostic(sp?) machine connected to all the sensors.so you can see why Im thinking carb..... Anyone? Im passed mad at this thing all I can do now is laugh. I can picture the guys at FORD scratching there heads looking at the engine like WTF!:giggle: Quote Selected
kind of a step back (maybe) Reply #7 – May 01, 2006, 02:26:19 PM i dont see it impossible for some of the dirt from the tank to made its way through the system in to small screens in the fuel injectors, or possibly an o2 sensor issue Quote Selected
kind of a step back (maybe) Reply #8 – May 01, 2006, 02:38:27 PM Quote from: SLEEPER T-BIRD 87i dont see it impossible for some of the dirt from the tank to made its way through the system in to small screens in the fuel injectors, or possibly an o2 sensor issueWe thought of that too, I had 24lb on it and they were cloged so we borrowed a set from a friend and it ran the same so yesterday I put a new set of 19lb back on it, no change.Its not throughing and o2 codes I would have thought FORD would have been all over that. We have mill eliminators on the back two and the front two are new. Quote Selected
kind of a step back (maybe) Reply #9 – May 02, 2006, 01:34:04 PM Have you checked wire bundles. Any wear or tear. maybe a wire fused with another. I am having electrical problems with my ranger, and that is all that is left. So I would suggest taking apart bundles. Might be time consuming, but could be the problem.Just my 2 centsdan Quote Selected
kind of a step back (maybe) Reply #10 – May 02, 2006, 07:32:31 PM I havent gotten into the wires too much yet, but I will. I guess Ill just go over everything again then start on the wires. I dont want a carb and whatever it is cant be too big, its just a matter of finding it...thanx Quote Selected
kind of a step back (maybe) Reply #11 – May 10, 2006, 07:04:13 PM did you do a backpressure check to see if the cats have collapsed or clogged? i had a 2002 c1500 at work with a p0300 code. it had a complete bank 2 missfire. it was adding fuel to bank 2- did a backpressure test and showed like 15psi in bank 2 at idle i beleive spec is 2.5psi at 2500 rpm. this was after the guy was at an independent shop and had his intake gaskets replace, along with every sensor imaginable. Quote Selected
Topic: kind of a step back (maybe) (Read 1760 times)
previous topic - next topic
