'87 XR with MBC, Front mount IC, Super Sequential BOV, stock computer, T-9 Transmission, 3" exhaust. When I drive down the freeway and accelerate to maintain speed lets say to atmospheric pressure, 0 on the boost gauge, then decelerate slowly I get a violent jerking reaction through the drive line. (I don't get it when I quickly decelerate then press the gas pedal down to cruise speed. This leads to uncomfortable driving.)
I think it might be the BOV isn't releaving pressure and causing a pressure surge.... Any ideas?
P.S. This didn't start until I installed the FMIC and BOV.
Jerking on slow deceleration
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Definitely look at/check the complete IC system. I'm reminded of a post some months ago (can't recall the exact description of the problem...) where after lots of sleuthing and head-scratching, the poster reported he found a small hole/leak in his IC which when fixed also resolved his problem. Point being that that's worth at least keeping in mind.
YMMV
YMMV
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Mike I had that once on my Talon, and it was the BOV for sure, swapped it out for another stocker and it ws no problem. Try another BOV and/or try to fix/setup yours?
John
86 Xr, lowered, cossie rear sway bar, wheels, intercooled, big vam, PE superchip.
91 Talon TSi, well modified, 5spd all wheel drive, runs 11's.
86 Xr, lowered, cossie rear sway bar, wheels, intercooled, big vam, PE superchip.
91 Talon TSi, well modified, 5spd all wheel drive, runs 11's.
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Re: Jerking on slow deceleration
An easy test is to simply clamp some 1" dowel rod in place of the BOV and head out for a drive. If the problem goes away, you know it's the BOV. BOV issues are cake to diagnose.