Serious Ignition Problem Please Help!!!

bodydropped72 · 04-06-2008, 10:44 AM

so ive had a few issues one being i would fry the number 2 cylinder coil( this has happened twice) and the second being my fuel pump. the issue with that was i would drive somewhere, not far shut it off do what i was doing come back out and it wouldnt fire had 12 volt going to the pump. i was told that 04 and 05 titans are having fuel pump issues and to change it out so i did. well friday i was letting my truck run in the driveway and its starts to miss again, i had thought my coil issue was gone but i guess not. just as a note my truck is "bagged" so i had to move my main fuse box, it unexpectedly got wet sometime ago figured this may be causing my problems so i changed it out from a wrecked truck i found in town. started my truck up and it wasnt missing about a minute later it started to. then it started missing really bad come to find out it fried 4 voils by the time i got it shut off not sure if it would have done more or not if i kept it running. can someone please give me some sort of path to go. i was thinkin of changing my ecm but not sure if it will solve my problems. Thanks Robby

37L1 · 04-06-2008, 10:47 AM

Quote:

Originally Posted by bodydropped72

so ive had a few issues one being i would fry the number 2 cylinder coil( this has happened twice) and the second being my fuel pump. the issue with that was i would drive somewhere, not far shut it off do what i was doing come back out and it wouldnt fire had 12 volt going to the pump. i was told that 04 and 05 titans are having fuel pump issues and to change it out so i did. well friday i was letting my truck run in the driveway and its starts to miss again, i had thought my coil issue was gone but i guess not. just as a note my truck is "bagged" so i had to move my main fuse box, it unexpectedly got wet sometime ago figured this may be causing my problems so i changed it out from a wrecked truck i found in town. started my truck up and it wasnt missing about a minute later it started to. then it started missing really bad come to find out it fried 4 voils by the time i got it shut off not sure if it would have done more or not if i kept it running. can someone please give me some sort of path to go. i was thinkin of changing my ecm but not sure if it will solve my problems. Thanks Robby

Did you ever solve your grounding problem?

**konigfritz** · 04-06-2008, 11:20 AM

IT does sound like you might have a poor ground somewhere.

Poor grounding can cause nasty problems

bodydropped72 · 04-06-2008, 11:22 AM

i thought i did checked them all fixed some i had forgot to reattach heres a question i had to move my battery to my bed and i have it grounded to the frame rail think i should run a cable to where it used to attach in the engine compartment, the only thing is i dont remember where it used to be bolted to..i really think there is something wrong with my computer

**konigfritz** · 04-06-2008, 11:26 AM

there may be, if a loose or bad ground caused a voltage spike, or inconsistant voltage, you may have partially fried the computer, or caused some mild damage.

Also did you grind the frame where you attached the ground, so you had good clean contact?

Check your grounds with an ohm meter, not just a voltage tester, make sure that there is very little resistance.

Good luck

bodydropped72 · 04-06-2008, 11:31 AM

back in august i had an exhaust issue that melted all the wires together above the heat shield where the stock muffler goes only did about 4 inches of the harness but i was just about every wire and it did not pop any fuses so im wondering if the computer took the hit and its just gradually been gettin worse

bodydropped72 · 04-06-2008, 11:36 AM

on checking the resistance do you go from a connection to frame or engine or...

TitanBlue · 04-06-2008, 01:31 PM

Quote:

Originally Posted by bodydropped72

i thought i did checked them all fixed some i had forgot to reattach heres a question i had to move my battery to my bed and i have it grounded to the frame rail think i should run a cable to where it used to attach in the engine compartment, the only thing is i dont remember where it used to be bolted to..i really think there is something wrong with my computer

Absolutely maintain all original ground points! This is serious! Get a heavy cable back to the original connection. Extra grounds will be OK. I think this is the cause of your problems...

I have had 2 trucks at work, have strange problems because of a lost ground, even though battery to frame was good. One was from Block to Frame, even though other paths that looked as good, were still there. Just not the same as an original path. Never delete an original ground path, the computers and sensor are terribly dependent on very close tolerances of resistance.

bodydropped72 · 04-06-2008, 04:27 PM

so should i think about getting another computer plus run the additional cable for ground...where did it used to attach?

bodydropped72 · 04-06-2008, 07:01 PM

bump......

Clint · 04-06-2008, 07:46 PM

Go to a dealer and ask to open a hood and study where they are and take some pics and notes, good luck.

**loufish** · 04-07-2008, 06:52 AM

You should have a large ground wire running from the batt to the engine, that's the way all vehs are wired, then most have a (or two) good sized wire from engine to the frame.

Remember the eng/trans mounts that isolate noise & vibration also don't conduct...

bodydropped72 · 04-07-2008, 10:30 PM

well i redid my battery ground to the engine block replaced the "4" coils that burnt and fired it up ran maybe 2 minutes then i heard it starting to pop so i shut it down i dont know what else to do is there any place out there that can diag a computer id rather spend the money to diag it to make sure its the problem than spend the money on another computer and it do the same thing

SOCALTITANKC4X4LE · 04-07-2008, 11:54 PM

Quote:

Originally Posted by bodydropped72

so ive had a few issues one being i would fry the number 2 cylinder coil( this has happened twice) and the second being my fuel pump. the issue with that was i would drive somewhere, not far shut it off do what i was doing come back out and it wouldnt fire had 12 volt going to the pump. i was told that 04 and 05 titans are having fuel pump issues and to change it out so i did. well friday i was letting my truck run in the driveway and its starts to miss again, i had thought my coil issue was gone but i guess not. just as a note my truck is "bagged" so i had to move my main fuse box, it unexpectedly got wet sometime ago figured this may be causing my problems so i changed it out from a wrecked truck i found in town. started my truck up and it wasnt missing about a minute later it started to. then it started missing really bad come to find out it fried 4 voils by the time i got it shut off not sure if it would have done more or not if i kept it running. can someone please give me some sort of path to go. i was thinkin of changing my ecm but not sure if it will solve my problems. Thanks Robby

I see two things you need to think about.

1. When You replaced The Fuel Pump Assembly, maybe the wiring got pinched and is causing problems with The ECU or other things like relays etc.

2. You said that you moved The Main Fuse Box, maybe a wire or wires were damaged.

bodydropped72 · 04-08-2008, 08:06 AM

none of the wiring is damaged i just moved it up away from the upper control arm i dont know what else to do