Breaking up from 3500-4000 rpm -

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Breaking up from 3500-4000 rpm

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Old 08-21-2013, 03:22 PM   #1
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Vehicle: 1992, FORD, MUSTANG
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Default Breaking up from 3500-4000 rpm

I have a 92 GT with a 351W, Msd pro billet dist. 42lb injectors, 70mm tb matching mass air and trick flow upper and lower intake and trick flow heads. My problem/ question is under normal acceleration its ok but if I get in the throttle hard it breaks up from 3500 to 4000 rpm then clears out and then flat out runs great. any suggestions?
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Old 08-21-2013, 04:58 PM   #2
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Have you had it tuned?
1995 Mustang GT
1999 F150 Lariat 4x4

Soon to come: 393 stroker
351w bored .030, Probe Industries forged internals, Trickflow 205's, FTI custom cam, Trickflow R 90mm intake, Accufab 90mm TB, FRPP 42lb injectors, 1 3/4" custom Accufab LT's, 3" exhaust, MS2
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Old 08-22-2013, 08:59 AM   #3
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You gotta tune your fuel map, it's got a nasty hole.

F&F reference points
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Old 08-23-2013, 09:35 AM   #4
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I would look to see if the timing is advancing right when you smack the gas. What is timing set at what plug gap? what is F/P set at?
Just another turbocharged Street Mustang, yes its fast. when it runs. But never fast enough
Few things for sale Most parts are OBO
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Old 12-26-2013, 08:52 AM   #5
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yeah the stock ecm is tolerable but not for all that you got man

347 , 11:1 Compression,Knife Edged Lightened Crank,AFR 185,Ported Trick-flow Intake,Ford X-CAM,Under-drive pulleys,aluminum drive-shaft, 3:73 gears,Fender Cold Air Intake,Long tube headers,MSD Digital Ignition System
Lightened chassis.

444 HP 436 FtLbTrq. high 10 second car !
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