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Old 06-14-2011, 01:00 PM   #1
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Spark blow out

Hey I have a 99 gt super charged dyno tuned recently at 5000 rpms at 5 psi it starts bucking basically 2 and 3 gear It won't let it see full boost which is 9.7 any ideas.
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Old 06-14-2011, 03:31 PM   #2
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Re: Spark blow out

what plugs and what range, have you pulled the plugs to look for signs of detonation or anything out of the ordinary?
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Old 06-14-2011, 03:45 PM   #3
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Originally Posted by SpectorV
what plugs and what range, have you pulled the plugs to look for signs of detonation or anything out of the ordinary?
I'm using Ngk tr6s.. I have not pulled them yet what should I look for? Nothing out of the ordinary it runs great other than this issue.
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Old 06-14-2011, 03:55 PM   #4
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Re: Spark blow out

check the gap, not sure what it should be but it shouldnt be like 50 or anything I dont think.

check the base for dimples or messed up areas.
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Old 06-14-2011, 04:08 PM   #5
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Re: Spark blow out

S/C You should close the gap up , probably like 028
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Old 06-14-2011, 06:43 PM   #6
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S/C You should close the gap up , probably like 028
Ok I'll check it out let you know how I make out thanks
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Old 06-14-2011, 07:39 PM   #7
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Re: Spark blow out

Why are you assuming the lack of full boost is spark based?

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Old 06-15-2011, 07:54 AM   #8
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Why are you assuming the lack of full boost is spark based?

-Will
Because the motor it self what achieve the rpms it needs to hit full boost. Centri superchargers full boost is achieved all up top
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Old 06-15-2011, 07:58 AM   #9
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Re: Spark blow out

Quote:
Originally Posted by Knight F Mohawk View Post
Why are you assuming the lack of full boost is spark based?

-Will
I was taking it as he couldnt get up in the rpms (to make boost) due to spark blow out/miss so its not missing boost its he cant get to the rpm level to make the boost under load.
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Old 06-15-2011, 08:03 AM   #10
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Originally Posted by SpectorV

I was taking it as he couldnt get up in the rpms (to make boost) due to spark blow out/miss so its not missing boost its he cant get to the rpm level to make the boost under load.
Yes correct
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Old 06-15-2011, 08:14 AM   #11
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Re: Spark blow out

check all connections for leaks and such as well and as said clean your MAF sensor
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Old 06-15-2011, 08:25 AM   #12
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Can you be a little more specific on what connections I should check.
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Old 06-15-2011, 09:54 AM   #13
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Re: Spark blow out

hoses on intake are all clamped down, no leaks or pipes not connected, maf sensor all sensor connections plugged up, and check any vacuum lines that might be disconnected.
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Old 06-15-2011, 10:40 AM   #14
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Re: Spark blow out

Don't take any chances check all connections.
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Old 06-15-2011, 07:51 PM   #15
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Ok i will check it out this weekend I will let you guys know what's up. Thanks for the help!
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Old 06-15-2011, 09:36 PM   #16
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Re: Spark blow out

What is your setup? All mods/details....

What plugs do you have and what are they gapped to?

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Old 06-15-2011, 10:01 PM   #17
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Vortech v2sq intercooler, 42 lb bosch injectors. Ford focus act fuel pump 255 lph, msd coil packs, 90 mm MAF, Ngk tr6 sparks.. I don't remember what I gapped them at it was a year ago.
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Old 06-15-2011, 10:06 PM   #18
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Re: Spark blow out

Ah, get some fresh TR6's and gap them down to about .035-.040

See how that works before you do anything else.

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Old 06-16-2011, 07:36 AM   #19
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Lol that's it I'm gonna start some where easy. Thanks I appreciate it, l will keep you updated.
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Old 06-17-2011, 12:34 AM   #20
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Re: Spark blow out

That's always the best approach! Let us know how it goes!

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Old 06-17-2011, 08:09 PM   #21
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Yes plugs need to be gapped around .035. Also make sure you dont drop fu pressure as well. Im running a similar setup but a bit more boost and aftercooled and i needed the boostapump even after the 255
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Old 06-21-2011, 07:08 AM   #22
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All set guys changed the plugs gapped at .033 and the car runs mint. I can hit the rev limiter no problem. Thanks!
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