Is she going brain dead?? ecu/spark problems...

[Stripes]

Some of you may have read my problems thread from a couple weeks ago. I finally got around to replacing the ignitor chip with a q45 but I'm still not getting spark on cylinder #2. I've checked the packs, plugs, wire continuity, and now have replaced the ignitor yet nothing has changed. I'm stumped and the only thing I can think that would be left to cause this problem is the ECU itself. Not sure if a pin has burnt out or if the computer just isn't doing its job anymore or what.... Does anyone know if the ecu could cause such bull s***?

[Justin35ll]

CAS?, but yeah it could be the ecu as well.

[Stripes]

I thought of the CAS but shunned the idea soon after because that would cause all 4 packs to miss or not fire at all.

[Justin35ll]

I don't think it would cause them all the missfire, though I'm not sure. I have seen a friends gsr swap get NO spark to cyl 2 and 3. We tried everything until we replaced the cas and it started right up, but that was coil plugs not sure if it would have any difference with the packs

[Stripes]

Hmmm..... maybe you're on to something then. Plugs or packs, they both need a signal from something to fire properly. Was the motor non turbo or something?

[Justin35ll]

It was turbo, maybe it wasn't a gsr. I called it an sr knock off cause it was a transverse 2.0l 16v t25 turbo with a red valve cover. It was in his mitsubisi eclipse.

[Stripes]

New CAS installed today. Still no spark on cyl #2. I'm gonna double check my ecu pins tomorrow and continuity, and if I find no flaws then the ECU is getting replaced next.

[Justin35ll]

Hmm, sorry to hear it wasn't the cas. I would try the new ecu like you said. Hopefully that will solve your problem

[Stripes]

Pulled to packs and checked for spark. ALL of them are firing, so I must have overlooked something with the plugs or injector #2 is spitting way too much fuel for the plug to burn off. New plugs and injector o-rings are next, hopefully this will do the trick.

[Justin35ll]

So what is your problem now? You have have fuel and spark to all cylinders. Does it start and run?

[tercel drifter]

is your plug gapped properly?

[Stripes]

Plugs are fine, and yes I am getting spark and fuel to all cylinders. The problem is I am getting way too much fuel to cylinder #2, and possibly other cylinders as well. I found a decent amount of fuel sitting on top of piston 2 and slight amounts on the others. So I think the injectors are leaking for one reason or another, more than likely because I did not replace my O-rings when I put them in. My theory is there is so much fuel going to cylinder 2 that it is soaking the plug, not allowing it to do its job. This also explains why when the problem first started it would do it of and on; as the car sat there was enough fuel evaporated from the cylinder to allow the plug to properly fire until it again became flooded enough to cause the plug to no longer function.I got another sr today so I'm going to be using the fuel rail and injectors from it, as the injectors in it have not been tampered with and the O-rings should still be providing a good seal.

[duffman1278]

Wait wait wait, why did you say there was no spark?? Because it was misfiring, or because you grounded the spark plug and SAW that there was no spark?

If your #2 cylinder is leaking, it will more than likely be the o-rings. Replace them, and LUBE them. Then install the injects in correctly and you should be fine.

For now, remove the spark plug and let it evaporate the left over fuel.

[Stripes]

I took out my fuel rail and there was mad fuel sitting in the manifold. There goes the problem. I put in my other fuel rail and she started right up with no problems. So my spark problem was really a fuel problem, probably injectors not seated right and/or bad o rings like duffman said.

[frankies1390]

This is weird but im havin the same problem... but i do not have the injectors leaking mine is actually fuelin up too much is this due to FPR going bad or an ignitor problem? Spark seems to come in and out stronger to weaker as i crank the motor? didnt mean to butt in on your thread just curious if there is a resolution that i had missed?

[Stripes]

A bad FPR should not cause too much fuel to flow past, rather not enough. Have you tested all of your plugs and coil packs? Also, you should test your ignitor. There is a thread somewhere on here that tells you how, I'll have to find it but I tested mine simply by checking continuity in the wires from the ecu to the ignitor, then from the ignitor to the coil pack harness plug. By the way, an injector leak is what causes too much fuel, thats what my problem was. Have you messed with your injectors at all?

[frankies1390]

i have not really tested anything except for when i let it sit it starts right up but eventually floods itself and kills the car then its really hard to get started and sometimes it wont even start at all?

[Justin35ll]

Glad you found the problem. Had the same thing when I first started mine. cylinder 4 was leaking like a b****. I replaced all the orings but the one didnt seat right causing gas to slip by and flood the cylinder.

then I lost one of those stupid black little plastic oring spacer things for the rail so I had to make a ghetto one out of a couple washers lol it sucked, still in there though

[frankies1390]

so its completely confirmed that im pouring fuel in there! this is a result of a bad FPR or bad injector seat? Thank you guys for your help

[Stripes]

i have not really tested anything except for when i let it sit it starts right up but eventually floods itself and kills the car then its really hard to get started and sometimes it wont even start at all?

so its completely confirmed that im pouring fuel in there! this is a result of a bad FPR or bad injector seat? Thank you guys for your help

That is exactly what was happening to me. The first thing I would do if I were you is check your coil packs, just to make sure 100% that it is not a spark issue. Definitely definitely think it's an injector leak though, so you should at east pull your fuel rail and replace your o-rings and make sure that your injectors are properly seated in the rail. They are a pain in the nuts to get in but make sure you do it right. I highly doubt it's your FPR, and you should know if it's an injector leak as soon as you pull the fuel rail. When I pulled mine I had fuel sitting in my lower intake manifold and injector #2 was dripping fuel so it was pretty obvious that I had found my problem.

...then I lost one of those stupid black little plastic oring spacer things for the rail so I had to make a ghetto one out of a couple washers lol it sucked, still in there though

Hahaha, nice. They are not really extremely important anyway, as long as there is some sort of busing there for the injectors to press against it should be fine.

[frankies1390]

ok so i went to nissan ang grabbed a set o new upper and lower o-rings last night... i replaced all of them lubed em up and threw them in. Still the same problem is occuring!?!im super lost? i will borrow my buddys coil packs tonight to rule a bad coil. i cant beleive this crap!

[Stripes]

Just switch your own coil packs with each other, that would be easier than borrowing your friends. Also, are you sure you pressed the injectors in right? Have you checked for fuel on top of your piston and in the manifold? Maybe check the o-ring on your FPR, although I still don't see this being an issue. Hope you fix it though... let us know.

[frankies1390]

ok ive got 550cc brand new injectors and i know ive seated the o rings correctly cause i pulled the plug ech time it started to see if it was soaked with fuel... and when you say switch them what does this mean like just swap mine around cause ive targeted cyl #3 as my problem... cause this was in cyl #2 and that particular cylinder gave us problems when it was installed on # 2. Now that ive switched its causing problems to number 3 but is not soaking the plug anymore.

So now i will move on to the coil packs to see if this is the problem!

[Stripes]

Are you tuned? Just making sure.

[DLYNNW]

im having ecu prob.s to all my wiring right in the harnesses and everythings got power but my light is not coming on to show the ecu is getting power anyone know wht could b going on.