Sputtering engine.

TOYOTA COROLLA
Avatar
NICKNITRO
  • MEMBER
  • 2 POSTS
Hello,
I have an '89 toyota corolla station wagon, 101hp, 150,000mi, and recently every time I turn off the engine the car continues to run/sputter (not quite sure how to describe it). When I first bought it used, it used to do it once in a while, but now it will run for almost 10sec after I turn off the engine, and rumble as the rpms drop, then rev back up, then finally die. The car still runs alright, but i'm concerned that this is indicative of an eventually significant problem. Any help would be greatly appreciated.
Thanks,
NICK
Aug 26, 2007 at 2:07 PM
Avatar
DSPLC
  • ✓Experienced Mechanic
  • 220 POSTS
First, check your ignition timing. If it is too much advance, this is one cause of the engine running even when the ignition is off. If the ignition timing is correct and still the same problem, then the top of your piston is full/thick of carbon. Carbon is like a charcoal, it still got ember when lighted. The ember of the carbon burns the gas even when the engine is off. The ember of the carbon is acting like the spark in the spark plug. Buy a gasoline additive that removes carbon. As per instruction, I think add one can of additive per full tank of gas. Do this for few times. This might answer your problem.
Aug 26, 2007 at 5:56 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle