Got the Gen V swap done........been driving it all evening.... At 1st no problems what so ever... I got on it once about 3/4 throttle after driving it about 60 or 70 miles.... and i noticed it sputtering. I plugged in my Powertuner to see what was up..... and im showing a few misfires in Cyl 3 only under boost. Idle and normal driving no misfires at all. Wtf is goen on here?

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-2000 Grand Prix GTP 13.341 @ 102.62
-2003 Grand Prix GT (daily driver)
1991 Grand Prix GTP Getrag 284 5 speed 1 of 787 5 speeds in 91. 15.221 @ 92.46

Spark Blow out. I'de try a new round of plugs with a slightly smaller gap.

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also try replacing ur wires if the arent new

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Yep I had the same dam thing with mine. I put new plugs in and had issues. Put new plugs in and new wires. Fixed all my problems

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LIVE LIFE FULL THROTTLE

Thats exactly what came to my mind last night...... i thought my spark was getten blown out. I should probably go up to a 3.5'' pulley too..... cause ive always had a 3.4 on my Gen 3 no problems..... but its getten WAYY too much boost too quick w/ a 3.4 on the Gen V. If i slowly roll into it from any speed i get less then 1* KR...........but i punched it once from 65 and it spiked up to 11 or 12* really quick and at WOT at 120mph it was at 0*KR.....


I replaced my plugs and wires last spring.....got AC Delco wires in htere and TR6 plugs.....and i think i gapped em at .054....or .055..........what should I gap em at now?? .052 ??

Pulled the plug in Cyl #3 and the gap was at .057 Wen out and bought some AL-104's and im gunna gap em at .054 to start.

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-2000 Grand Prix GTP 13.341 @ 102.62
-2003 Grand Prix GT (daily driver)
1991 Grand Prix GTP Getrag 284 5 speed 1 of 787 5 speeds in 91. 15.221 @ 92.46

Ironically, I was having missfires in cyl 3 when I went more than 3/4 throttle or got into boost. I replaced my plugs, wires, and coils. It was still missing in cyl 3 so i checked the injectors and cyl 3 injector was crack at the end. if the plugs/wires dont work, check the injectors.

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2004 Black GTP Comp-G.... SOLD
NEW RIDE:
-99 Trans am
* midnight blue
*6sp manual
*t-top
* ls1 (305hp 350tq stock)
* B&M ripper short shifter
* hooker long tube headers (not installed yet)
* slp air lid
* corvette Z06 rims 17"/18" staggered

First step, check resistance on your plug wires, for possible issue. For factory wires, normaly resistance is around 50ohm per foot. MSD or similar would be around 30-40 ohms per foot.

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Thanks
Scott McKinney
http://www.motortopia.com/cars/16218" onclick="window.open(this.href);return false;

Just a reminder guys

When i bought my car last Aug. I took it back coz i had a few issues with the service dept. and when they did a scan there was a miss fire on Cyl 3. They told me there was an update for the PCM. They reprogramed it and all is fine.

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LIVE LIFE FULL THROTTLE

So curiously, what did the problem end up being?

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Thanks
Scott McKinney
http://www.motortopia.com/cars/16218" onclick="window.open(this.href);return false;

Pulled the plug in Cyl #3 and the gap was at .057 ....and the rest were at .056. And the increased boost from the Gen V was just blowing it out. Put AL-104's in there gapped at .054.......no more issues

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-2000 Grand Prix GTP 13.341 @ 102.62
-2003 Grand Prix GT (daily driver)
1991 Grand Prix GTP Getrag 284 5 speed 1 of 787 5 speeds in 91. 15.221 @ 92.46