Backfiring issue under WOT - Saturn Sky Forums: Saturn Sky Forum
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post #1 of 17 (permalink) Old 07-10-2012, 02:47 PM Thread Starter
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Backfiring issue under WOT

Hello again, I am having backfiring issues under full throttle and it is really annoying. It started right after I installed the new SOLO Exhaust. It seems to be doing it right after i hit 24psi. It starts popping and its embarrassing when you are trying to pass people. I starting having miss-firing issues but I believe I solved that with a larger fuel pump. My Tuner (Vince) has told me that I either have an exhaust leak or have a lack of back pressure. I went under the car and checked for leaks and I don't hear or feel any leaks coming out of the downpipe or exhaust. Has anyone else had this issue and what can I do to fix it. Thanks

'09 Redline
  • Hahn Intercooler
  • Dejon IC Pipes
  • Snow Performance 20010
  • Precission 5557 DBB
  • Greddy BOV
  • 3" Catless downpipe
  • Trifecta Tune
  • Solo Performance Mach Shorty
  • High Flow Fuel Pump (700hp rating)
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post #2 of 17 (permalink) Old 07-10-2012, 03:56 PM
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I had this the first week I installed the SOLO exhaust, then the ECU settled-out.
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post #3 of 17 (permalink) Old 11-07-2012, 12:40 AM
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Bump. I have a hi-flow cat, solo mach shorty exhaust, and the trifecta tune. I also notice a backfire every once in a while when I am WOT and changing gears... not sure why. Any ideas anyone?

2008 POLAR SKY REDLINE
trifecta tune
solo mach shorty & hf cat
ddm backbone & pro-beam
blackcat led gauges
k&n CAI
opel gt antenna
rear lp led & trunk led
MGP Red Caliper Covers
Fender led's
LED DRL's
Norm's rear diffuser fascia
pf!
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post #4 of 17 (permalink) Old 11-07-2012, 08:53 PM
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Could be spark plugs. Playing with the gap can sometimes resolve this.
But since you changed out the biggest bottleneck in the stock system, if the ECU and spark plugs dont fix this, you might need to do some logging and adjust your tune

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I'm not short, I'm concentrated AWESOME
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post #5 of 17 (permalink) Old 11-07-2012, 09:13 PM
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Recommended spark plugs?

2008 POLAR SKY REDLINE
trifecta tune
solo mach shorty & hf cat
ddm backbone & pro-beam
blackcat led gauges
k&n CAI
opel gt antenna
rear lp led & trunk led
MGP Red Caliper Covers
Fender led's
LED DRL's
Norm's rear diffuser fascia
pf!
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post #6 of 17 (permalink) Old 11-07-2012, 10:07 PM
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Stock ones [AC Delco 41-108] gapped between .028 to .032

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post #7 of 17 (permalink) Old 11-10-2012, 11:45 PM
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one step colder than stock is better.

GM Stage 1 Tune|Solo Street Race Exhaust With Magnaflow Mufflers|GMR 8K HIDs|Parking Light Leds|License Plate Leds|Little Chromies|3rd Brake Light Vinyl:REDLINE|GMR Pulsating and Sequential Taillights|
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post #8 of 17 (permalink) Old 11-11-2012, 01:29 AM
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I tried that and my car hated the colder plugs
The AC Delco 41-108s work great on mine
I just gap them different depending on my fuel
.035 for E47
.028 for 93 Octane

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post #9 of 17 (permalink) Old 11-11-2012, 09:25 PM
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I recently upgraded to the Hahn Super 20g and am having the same problem at WOT. Hits 24psi and starts backfiring. I sent the logs to Vince, hoping he can solve.

Last edited by Jaysmith2000; 11-11-2012 at 09:40 PM.
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post #10 of 17 (permalink) Old 11-11-2012, 10:48 PM
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You might be running into fueling issues.

LUSIFER

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post #11 of 17 (permalink) Old 11-12-2012, 05:56 AM
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or it might be vince...

GM Stage 1 Tune|Solo Street Race Exhaust With Magnaflow Mufflers|GMR 8K HIDs|Parking Light Leds|License Plate Leds|Little Chromies|3rd Brake Light Vinyl:REDLINE|GMR Pulsating and Sequential Taillights|
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post #12 of 17 (permalink) Old 11-16-2012, 12:34 AM
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Any update on that Jaysmith?

2008 POLAR SKY REDLINE
trifecta tune
solo mach shorty & hf cat
ddm backbone & pro-beam
blackcat led gauges
k&n CAI
opel gt antenna
rear lp led & trunk led
MGP Red Caliper Covers
Fender led's
LED DRL's
Norm's rear diffuser fascia
pf!
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post #13 of 17 (permalink) Old 11-17-2012, 01:57 PM
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Quote:
Originally Posted by w00theyyou View Post
Any update on that Jaysmith?
Nope, still waiting, I've sent 3 different logs to Vince, it also threw a P2216 on the second log. I cleared and ran the 3rd without it hitting again. I do have the Dejon CAI, I keep reading that might create issues, should I just put on the stock?

Vince said he would look through the logs and get back to me. I'll post here when I get an updated tune.
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post #14 of 17 (permalink) Old 11-18-2012, 01:26 PM
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I have the stock intake. Was thinking about doing the K&N or GMPP if I can find it....

2008 POLAR SKY REDLINE
trifecta tune
solo mach shorty & hf cat
ddm backbone & pro-beam
blackcat led gauges
k&n CAI
opel gt antenna
rear lp led & trunk led
MGP Red Caliper Covers
Fender led's
LED DRL's
Norm's rear diffuser fascia
pf!
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post #15 of 17 (permalink) Old 11-19-2012, 02:56 PM
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I have the K&N CAI.. I like it.

07 Redline
Team Hybrid San Antonio Chapter Director

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