PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Help-big injector bog off the line!!!!

Old Jul 2, 2007 | 06:02 PM
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Default Help-big injector bog off the line!!!!

Guys-i recently installed a set of 96lb injectors in my car and now i have one glaring problem. The car bogs off the line. All I did on the fuel tables is adjust the IFR table, multplied the whole offset table buy 90% and turn the fuel pressure down to 45 psi. It never did this with the 60's but it's doing it with the 96's. Any help would be greatly appreciated-thanks!
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Old Jul 3, 2007 | 01:24 PM
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Are you logging the A/F ratio?

Is it dipping rich as you just BARELY touch the throttle?
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Old Jul 3, 2007 | 09:43 PM
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If I wack the Throttle when the car is parked at idle it goes lean right after-I'll have to log it in drive and see what it does.
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Old Jul 4, 2007 | 08:26 AM
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Originally Posted by eb02z06
If I wack the Throttle when the car is parked at idle it goes lean right after-I'll have to log it in drive and see what it does.


what #s did you input on your IFR? i assume your running referranced.
is the car running ok everwhere else?
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Old Jul 4, 2007 | 08:29 AM
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Nick right now I'm trying a #86 swing per Slowhawks advice-that's up from a the #74 swing I had before. I am running referenced but boost only-I have a check valve inline and do not pull vacuum. The car drives fine everywhere else-it goes like snot-after the bog.
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Old Jul 4, 2007 | 09:34 AM
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Do you have a way to log fuel pressure?
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Old Jul 4, 2007 | 01:27 PM
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Well I went home at lunch to see what the AFR does. As soon as I touch the throttle the car goes from 14.5 to 16-17, so it's going lean. Could this be causing my stumble? Should I correct this in my VE table or my MAF?

thanks!
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Old Jul 5, 2007 | 03:31 AM
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Originally Posted by eb02z06
Well I went home at lunch to see what the AFR does. As soon as I touch the throttle the car goes from 14.5 to 16-17, so it's going lean. Could this be causing my stumble? Should I correct this in my VE table or my MAF?

thanks!
disable your maf and tune your VE. With your combo I would ditch the MAF entirely. But thats me
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Old Jul 5, 2007 | 07:54 AM
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Originally Posted by macca_779
disable your maf and tune your VE. With your combo I would ditch the MAF entirely. But thats me
I've been trying to get him to go SD for awhile now. He won't turn
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Old Jul 5, 2007 | 09:11 AM
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Originally Posted by Slowhawk
I've been trying to get him to go SD for awhile now. He won't turn
I'm going to order the upgrade today Don-if you say its the way to go then that's all I need to hear. BUT for now I'm going to do a VE/MAF calibration. I need to get to the track this weekend. How long would it take to get a SD 3 bar tune up and running for the track?

Also what's the GM part # for the 3 bar map that plugs inot the manifold?

Thanks guys!
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Old Jul 5, 2007 | 10:06 AM
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SD SD SD SD ...i love my olsd combo though i was dragged kicking and screaming to it.
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