Jeep Wrangler Forum

Jeep Wrangler Forum (
-   YJ Tech Forum (
-   -   does a 89 YJ have a flywheel position sensor (

89JEEPYJ 10-29-2010 02:52 PM

does a 89 YJ have a flywheel position sensor
hello i have a 1989 jeep wrangler with a 258. automatic transmission. recently everyone once and a while the truck will not accelerate. it starts and idles perfect. but once u put it in gear it just becomes messed up. when it starts acting up it gets wurse as it gets warmer. yesterday it ran super fast after i did a full tune up. i was smoking the tires witch i have never done before(cant even spin the tires a tiny bit usaully). and than 10 seconds later the truck would instantly die if u touch the gas. i was thinking it could either be the flywheel position sensor or a bad coil, any ideas. at this point it is running good again, but i dont want to have another relapse of this when i am not at home.

89JEEPYJ 10-29-2010 03:45 PM

i dont think it does i dont see one on the transmission

warment 11-08-2010 11:07 AM

Not sure about an 89, but my brother's 88 2.5L has a crank position sensor on the trans...

kik 11-08-2010 01:39 PM

An 89 4.2 doesn't have one. It could be the coil, but most likely it's a bad Ignition Control Module.

89JEEPYJ 11-09-2010 08:07 AM

Its running ok know. I've come to realize that with all the upgrades, I am not getting hot enough spark to allow it to drive the way it should. I have 8mm wires and high performance stuff, witch doesn't help. So know I am gonna try the HEI kit. When mu past coil was cracked it was arcing out allowing more voltage to flow to spark plugs, and the truck temporaraly turned into a race car. It was sooooooo fast (can't be driving around with those huge sparks coming out of the coil though

warment 11-10-2010 08:42 AM

I should have clarified brother's Jeep is a 1988 Wrangler 2.5L with AX5 trans.

All times are GMT -5. The time now is 10:55 PM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.