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TBI Whipple HELP!!!

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Old Aug 17, 2004 | 10:53 AM
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Default TBI Whipple HELP!!!

Need some help with a Whipple problem?? 95 TBI 383 Stroker .. Cuts out and
backfires around 4000 rpm's. Has a helper pump, late model tbi big block injectors and fuel pressure regulator. I am guessing the one that comes in the kit. Fuel pressure is steady @ 28 psi until boost and climbs to a steady 35 psi and doesnt change before and after cutting out. O2 sensor shows lean at the time of the cutting out. o2 sensor reads between 900 - 950 just before cutting out the changes to below 20 when it cuts out.

Thanks for any help!
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Old Aug 17, 2004 | 11:34 AM
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Originally Posted by Flipper
Need some help with a Whipple problem?? 95 TBI 383 Stroker .. Cuts out and
backfires around 4000 rpm's. Has a helper pump, late model tbi big block injectors and fuel pressure regulator. I am guessing the one that comes in the kit. Fuel pressure is steady @ 28 psi until boost and climbs to a steady 35 psi and doesnt change before and after cutting out. O2 sensor shows lean at the time of the cutting out. o2 sensor reads between 900 - 950 just before cutting out the changes to below 20 when it cuts out.

Thanks for any help!
What is your plug gap? You might be blowing out the spark due to the increased boost pressure.
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