SS M90 Question...

**Bedwards** · 03-02-2010

Originally Posted by minichopper6hp

You check the plug?

I'm about to go check. I'm just eating and resting my back. I don't know how mechanics do this for a living haha.

**Bedwards** · 03-02-2010

I'm replacing the wires right now. Hopefully this fixes it.

**Bedwards** · 03-02-2010

****! I'm getting more misfires. They are random and are jumping around to nearly every cylinder. Could it be the coil? Can I replace my GTP coils with my GT coils ontop of the coil bracket plate, or are the coils different altogether? By the way, my fuel pressure is sitting around 45 psi at idle.

**FoSHO99** · 03-02-2010

What are you scanning with? Any way you can post up a scan? I don't think 1 wire is your issue, i think its either multiple wires/coils or running way too rich, possibly due to the wrong ifr tables in the pcm or wrong maf table? I would not drive it or rev it until it idles well.

Switch the whole ICM+coil packs from the gt to the gtp.

**silverstreak** · 03-02-2010

Originally Posted by Bedwards

****! I'm getting more misfires. They are random and are jumping around to nearly every cylinder. Could it be the coil? Can I replace my GTP coils with my GT coils ontop of the coil bracket plate, or are the coils different altogether? By the way, my fuel pressure is sitting around 45 psi at idle.

I think you have a very big vacuum leak

**BwolfGT** · 03-02-2010

What's your cat looked like? My old one was horrible and that picture looks like that black **** that came out of it when I took it off.

**Bedwards** · 03-02-2010

Originally Posted by BwolfGT

What's your cat looked like? My old one was horrible and that picture looks like that black **** that came out of it when I took it off.

Its a brand new downpipe from ZZP. Maybe has 5000 km on it.

**silverstreak** · 03-02-2010

Start with the coils packs and icm. Swap them out and see what happens.

**BwolfGT** · 03-02-2010

Did you ever chck the vac lines? That would make it run rich.

**Bio248** · 03-02-2010

you need a TUNE.

**Bedwards** · 03-02-2010

Replaced the coils and ICM, didn't help it. Can I just keep these coils and ICM on, or should I change them back to the GTP ones? I don't think it makes a difference. I'm having trouble identifying if there is a vacuum leak or not.

**Bedwards** · 03-02-2010

Originally Posted by Bio248

you need a TUNE.

The Intense one isn't capable of even running the car decently enough to drive? I could understand a loss of power, or problems with shifting, but to cause this type of rich condition, alongside this many misfires... That is BAD if it's the PCM. HUGE waste of money.

**BwolfGT** · 03-02-2010

Originally Posted by Bedwards

The Intense one isn't capable of even running the car decently enough to drive? I could understand a loss of power, or problems with shifting, but to cause this type of rich condition, alongside this many misfires... That is BAD if it's the PCM. HUGE waste of money.

99prix has been running an intense topswap tune for a good year now with no problems. Even the stock GT tune should be running the car better than this honestly. Unless they ****ed something up BAD on your particular PCM, the tune is not the issue here.

**Bedwards** · 03-02-2010

Originally Posted by BwolfGT

99prix has been running an intense topswap tune for a good year now with no problems. Even the stock GT tune should be running the car better than this honestly. Unless they ****ed something up BAD on your particular PCM, the tune is not the issue here.

Hmmmm... If I fix these vacuum leaks tonight and it still runs bad, I'll be out of ideas.

**Bedwards** · 03-03-2010

Any possibility this could be a faulty 02 sensor?

**FoSHO99** · 03-03-2010

Originally Posted by Bedwards

Any possibility this could be a faulty 02 sensor?

Well the engine goes into closed loop 30-60 sec after startup. But you are scanning, what does the 02's read? It might read or stay at a constant number if it was bad.

Not necessarily saying the intense tune is junk, somethings not right. It seems like its dumping way too much fuel. Where did you get this pcm from? Directly from intense? What year was it for? What year of maf are you using?

**Bedwards** · 03-03-2010

Originally Posted by FoSHO99

Well the engine goes into closed loop 30-60 sec after startup. But you are scanning, what does the 02's read? It might read or stay at a constant number if it was bad.

Not necessarily saying the intense tune is junk, somethings not right. It seems like its dumping way too much fuel. Where did you get this pcm from? Directly from intense? What year was it for? What year of maf are you using?

I'll have to read the O2 reading tomorrow. What should it be, approximately?

I got the PCM directly from Intense. He asked what I was doing and what mods I had done. I told him everything I was doing to it. It's for a 2001 Grand Prix GT. The MAF sensor in my car is stock, I haven't changed it.

**minichopper6hp** · 03-02-2010

What kind of fuel pressure regulator did you use.

**Bedwards** · 03-02-2010

Originally Posted by minichopper6hp

What kind of fuel pressure regulator did you use.

I have the ZZP billet fuel logs. I requested the L36 SS M90 ones, but I see they say "black only" in brackets, and mine is blue. I hope they sent me the right one... Unless they just have other colors now...