Jerking, bucking when accelerating
Thread Starter
Can Post Only in New Member Section
Joined: Jun 2018
Posts: 1
Likes: 0
From: Asheville NC
Jerking, bucking when accelerating
My 17 yr old son is new to the rotary engine cars . Just bought a 1990 rx7 13b. The car starts great but once you get going down the road, at acceleration the car starts bucking ( sorry, lack of better wording). Thinking it may be a bad TPS or plugs but I need advise. I work on all our vehicles myself but never have had a rotary motor and don't have a clue how to diagnose problems. ANY advise would be greatly appreciated.. Thank You in advance.
Joined: Jun 2006
Posts: 4,815
Likes: 24
From: Columbia, Tennessee
TPS is a common failure component that will cause severe bucking and backfiring. Try setting adjustment on it using the factory service manual method listed on foxed.ca. Second thing I would check is ignition timing.
My mom lets me redline
Joined: Oct 2011
Posts: 600
Likes: 132
From: Cornwall, ON
Last edited by Rotary Alkymist; Jun 26, 2018 at 10:34 PM.
Junior Member
Joined: Aug 2018
Posts: 9
Likes: 0
From: maine
Check the MAF sensor as well (function in addition to just making sure that it’s securely connected). I recall accidentally leaving mine off while doing some other work, and then taking it for a test drive. Was scared that I’d broken something, but turned out that we just hadn’t plugged the MAF back in after a long night of tinkering...