Has to be wiring right?

[Dietbudda]

OK so i've been having misfire problems and it's always cyclinder #4,

my 1st went after the starter motor died. The night before i had washed my car, while replacing the starter motor i had forgotten to ground out the power wire beofre changing the starter and sparked while loosening the power cable.

I thought that shorting out had caused it to go bad so i replaced it and either i got a bad one or i shorted it out when i put it in cause immediatly it was bad. got another one put it in and it wasn't working...then all of a sudden it started working.

Washed the car last night not thinking it might have something to do with the ICM going bad and it started to misfire a little, today went to drive it to school, horrible. Waiting on my volt meter so i can test the ICM.

the first ICM was bad on #1 and #3 they next two went bad on #4 and sometimes #2.

Any idea on what to start looking at and possible tests to run? I want to find something before i put a new ICM in and fry it...

All i want to do is start tuning the car so i can boost it up, thanks guys!!!

[audinutt]

It could be wiring, could be faulty coils (doubtful), I am wondering when you are changing your ICM, are you putting thermal paste on the new ones? You should be.

Also, are you mounting them correctly in the stock location?

-richard

[Dietbudda]

It could be wiring, could be faulty coils (doubtful), I am wondering when you are changing your ICM, are you putting thermal paste on the new ones? You should be.

Also, are you mounting them correctly in the stock location?

-richard

the paste, no i didn't use it this time, i went into radioshack looking for Dialetric Greese and they had none, is there another term for it?

As far as stock location, i have no air box or anyhting resembling an air box anymore, where else could i install it? I orgianlly, before all the troubles, had it zip-tied to the little 'support' on the passenger side, i have no well liner either.

[audinutt]

Well this MAY be your issue, as on the airbox there is a piece of metal that acts as a heatsink to dissipate the heat from the module.
You need to be using thermal paste. I used the stuff from computer CPUs.
But, without any sort of heatsink being attached firmly this isn't going to help one bit.

This is more than likely causing your early demise of the ICMs

-richard

[317ssayzarc]

Well this MAY be your issue, as on the airbox there is a piece of metal that acts as a heatsink to dissipate the heat from the module.
You need to be using thermal paste. I used the stuff from computer CPUs.
But, without any sort of heatsink being attached firmly this isn't going to help one bit.

This is more than likely causing your early demise of the ICMs

-richard

maybe... mines just hanging there though and its been fine for 250+ miles... how many miles you get on one budda?

[Dietbudda]

75 ish...

[317ssayzarc]

hmmm somethings wrong there... how/where is yours mounted? mines up in the fenderish area where theres good airflow...

[Dietbudda]

same place as yours, got no fender liner either so it gets LOTS of air...

[317ssayzarc]

got fender liners here but no bumper so we are even lol.... dunno why youd be going thru em so idk man

[Dietbudda]

O have a crack in the ECU cover that water must have gotten into, might have somethign to do with it

[317ssayzarc]

well you cant have water in there dude ... this could be costly if water really did get in there and in a decent quantity...

any dampness near the pedals?

[t1demont1]

seal that shit up quick. As for the metal heatsink thing, ive been running a cone filter since ive had the car, Its never been attached and no problems.

[Dietbudda]

yeah it wasn't a GREAT deal of water, opps. everything else is checking out fine, it's all sealed up now though

Not alot but enough to make me figure it out...

[317ssayzarc]

what software are you running again?

[Dietbudda]

unitronic 440cc BT file with split second FTC for the newer tune

[317ssayzarc]

i was going to lend you my tapp file but unfortunetly it wont work for you...

sucks your are running into these problems man, comes with the territory i suppose... lemme know if theres anything i can do to help

[Dietbudda]

I've 'sorta' found the problem.

misfire in cycl#4, replace ICM, dosen't move.
play around with the wires in back of ecu, push in one wire starts running better.
Misfire moves to cycl#1, cannot make it dissapear.

Here are the wires involved in the whole shing-a-ma-gig

I don't know if anyone has dug into this part of our wiring but where they all connect, it's just a bunch of wire 'crimped' together. The wires then go into a connector on the fuse panel that runs to fuse 32 if i remember correctly...

Anyone? please?

[Dietbudda]

Fuck it, i'm just replacing the ENTIRE wiring harness...

[317ssayzarc]

whoa whoa whoa... i didnt see when you posted on the 30th... im sending you a pm with my cell number, call me sometime after 5pm when you can be looking at this diagram while we speak... we'll get this sorted out