Pelican Parts Forums - Jerky deceleration

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Quote:

Originally Posted by jlex (Post 12057077)

I have an '88. The '85 I had before that had the bucking issue at deceleration, but it went away after installing a Steve Wong chip.

On the '88, I had no bucking issue to begin with, but decided to install the SW chip for the added performance. That's when I had a bit of bucking.... not severe, but noticeable after not having the problem w/o the chip. Emailed Steve Wong about it and he said maybe I have a vacuum leak. Checked for a leak, but found nothing.... so... I decided to simply reinstall the original chip. Bucking gone. Must have something to do with the timing which I suppose is what the chip modifies. Would rather have a smooth ride vs better performance. Is funny that it was a cure on the '85, but caused a bit of a problem on the '88. Weird. Anyone out there want to buy a barely used standard SW chip?

Which motor is the chip for - 231hp, 207hp or 217hp?

Sent from my SM-G988B using Tapatalk

It's the stock 214 hp engine with the catalytic converter. Chip is 28 pin.

Sounds to me like engine is still being fueled on overrun condition. I would recommend checking the microswitch on the throttle body to be sure it's adjusted correctly. This switch signals a closed throttle condition to the ECU during overrun which shuts off fueling to the engine, eliminating any bucking or exhaust popping. Also assists in engine braking.