302 EFI backpressure ???
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New User
Joined: Jul 2003
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302 EFI backpressure ???
I have an 86 302 EFI truck engine and im runnin bbk headers shortys and glass packs and no cats and 2 1/2 stop under the cab straight glass packs, it sounds good and all, but im getting hesatation in the throttle, is that from lack of back pressure ?? and It is true dual
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New User
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no, what i mean is that it is like a lean spot in the engine when i cruz at any rpm it fluxuates the tack dosent move enogh to see it but u can feel the hesatation, sort of like a skip, think im gettin to much flow, and the computer is not agreeing with the exhaust ?
Elder User
Joined: Jul 2003
Posts: 586
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From: South Dakota
It may be your O2 sensor is having a hard time getting a reading now because of the free flowing exhaust, with the cats in the exhaust was slowed jus enough for the O2 to work, a new one may help you out.
Lead Driver
Joined: Feb 2003
Posts: 8,140
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From: Oak Harbor, OH
you could use an h-pipe to try and gain some of the backpressure back without restricting the flow as much as the cats. It's probably just a bad o2 sensor though, try mounting it closer to the engine.
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RobStrunk
1987 - 1996 F150 & Larger F-Series Trucks
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Feb 23, 2013 07:12 AM
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