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SS M90 Question...

I changed my coolant elbows this morning. It started up after that. However, after I attempted doing a CASE Relearn (which I don't think succeeded), the car wouldn't start again. Could I have flooded it with the revving? When it finally did start (which took a lot of cranking), I got black smoke out of the exhaust for about 30 seconds, and I could smell gas...

Here's a picture of what came out of my exhaust after I revved it:

Exhaust.jpg
 
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I'm getting the P0300 code, however I noticed my scan gauge is telling me there are misfires on Cylinder 2. I'm going to check the plug and wire.
 
****! 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.
 


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.
 
Bedwards said:
****! 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.
Click to expand...

I think you have a very big vacuum leak
 
FoSHO99 said:
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.
Click to expand...

The coil packs won't work with the ICM? Those connectors are so hard to get at.
 
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I used an Aeroforce gauge to scan. Here are some of the parameters. I'm clueless in this department.

MAP HG/PSI = -20.6
MAP KPA = 28
BOOST = -20.6
MAF LB/M = 0.58
MAF FREQUENCY =2445
IGNITION ADV. = 20.5
LONG TRIM = -25
SHORT TRIM = -14
IAC = 41
CMD A/F = 14.7
INJ FLOW MM3 = 4
BAROM PSI = 12.9
INTAKE AIR DEGREES F = 57
MISFIRES: 40
 
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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 said:
THe coil packs won't work with the ICM? Those connectors are so hard to get at.
Click to expand...

It's one bolt towards the bottom of the coil packs to unplug the connector and 3 nuts under the coil packs/icm to release the icm with the coil packs still connected. Switch them.

Bedwards said:
I used an Aeroforce gauge to scan. Here are some of the parameters. I'm clueless in this department.

MAP HG/PSI = -20.6
MAP KPA = 28
BOOST = -20.6
MAF LB/M = 0.58
MAF FREQUENCY =2445
IGNITION ADV. = 20.5
LONG TRIM = -25
SHORT TRIM = -14
IAC = 41
CMD A/F = 14.7
INJ FLOW MM3 = 4
BAROM PSI = 12.9
INTAKE AIR DEGREES F = 57
Click to expand...

Your fuel trims are telling us that its really rich and pulling fuel to compensate, your inj. pulse is at 4 which is very high for idle, was this a spike during idle or a normal idle? If there was a vac leak, the car would be adding fuel or the fuel trims would be at +16 or so. Its also hard to tell until you get it idling normally. You might even want to give the GT injectors a try. The GT inj. are 33# and the GTP inj. are 36# or so, when tuning a top swap, if they don't put the correct tables in and your using higher # inj now, that would make it run rich. I am unsure if that would make it run THAT rich though.
 


FoSHO99 said:
It's one bolt towards the bottom of the coil packs to unplug the connector and 3 nuts under the coil packs/icm to release the icm with the coil packs still connected. Switch them.
Click to expand...

Ohhh. I meant the connectors down by the pulley.

FoSHO99 said:
Your fuel trims are telling us that its really rich and pulling fuel to compensate, your inj. pulse is at 4 which is very high for idle, was this a spike during idle or a normal idle? If there was a vac leak, the car would be adding fuel or the fuel trims would be at +16 or so. Its also hard to tell until you get it idling normally. You might even want to give the GT injectors a try.
Click to expand...

Hmmm. This was at normal idle. It may be off a bit, as the car was misfiring while I took the readings. I can't use my GT Injectors because I've already spliced all the wires with the new GTP injector connectors. :(
 
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.
 
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