Engine cuts out on highway

Nightclaw · 09-15-2001, 02:37 AM

Okay, this is getting silly. On the way back from MIT tonight, I had a little episode that crops up every once in a while with my YJ. It's done this maybe six times in the 1½ years I've owned it, but I was wondering if anyone else has had this happen, and what they problem/solution was.

I'll be cruising down the highway at a comfortable 70 MPH, straight and level. Suddenly, the engine will stop firing for 1-2 seconds, then pick back up like nothing ever happened. It has ONLY ever done this on the highway, and extremely rarely at that; has never ever happened on the trail or in town. Environmental conditions seem not to matter.

But being faced with an involuntary axle swap, I am now wondering if something else is wanting to crap out on me. Year model and mods in the sig.

I'm sure someone's going to want to suggest replacing normal wear components of the ignition. I've done that (plugs, wires, cap & rotor all <1 year old), and had the injectors cleaned.

Cheers!

Razskidoo · 09-15-2001, 11:07 PM

I have the same problem! The only thing I haven't change yet ,is the catalytic converter.

Nightclaw · 09-16-2001, 11:57 PM

Well, I can safely say it's not the catalytic. I have a Random Tech cat w/ less than 10k miles on it. My YJ did this both before and after I installed the cat. So at least that one less thing you need to replace to troubleshoot, Razskidoo.

MKB · 09-17-2001, 11:03 PM

sounds like on of those 'shorts' that are hard to fine. set the parking brake, start it up, and start wiggling wires. You'll know when you find it.

Nightclaw · 09-18-2001, 11:50 AM

Hey, not a bad idea! Since I won't be driving it anywhere for a while (Broken D35C), I'll have plenty of time to run the engine in the driveway and do exactly that.

lostboy · 09-18-2001, 11:11 PM

well...the same thing happened to me out of the blue while i was 100 mies from base. lol ...now anyway...but it turned out to be the igniton control computer was bad intermittently..the problem would come and go ,until one day the engine started backfiring like anything and wouldn't start again...replaced that module ..it can be tested at the dealership....and haven't had any problem since ..also it increased mileage by about 3 mpg..and it gave no indication beforehand that anything was wrong

Nightclaw · 09-19-2001, 12:15 AM

Well, there ya go - typical Chrysler electronics.

I think the only way they could build an electronic device that didn't suck would be if they started building vacuum cleaners...

Any idea how much a new ICC runs, and can the module be tested off-vehicle? Thanks!

09-15-2001, 11:07 PM	#2
Razskidoo Registered User Join Date: Mar 2001 Location: Warren,Mi.,USA Posts: 38 Profile Gallery Classifieds My Jeeps	I have the same problem! The only thing I haven't change yet ,is the catalytic converter. __________________ 92 Wangler ,I-6 ,3"lift, 32x12.5

09-17-2001, 11:03 PM	#4
MKB Registered User Join Date: Aug 2001 Location: Montana Posts: 14 Profile Gallery Classifieds My Jeeps	sounds like on of those 'shorts' that are hard to fine. set the parking brake, start it up, and start wiggling wires. You'll know when you find it. __________________ 94 YJ 2.5, 5 spd PerformanceAid Throttle Spacer K&N w/ Turbo Tube Swaybar Disco's 2.5" Spring Lift w/1.25" HD Shackle 1" Body Lift 4.56 gears w/ Rear Detroit Gearless 31x10.5 Nankang Radial A/T 15 to 20 Gal tank conversion Warn 9000LBS Dual Batt and 150 Amp Alt Home-made Front&Read bumpers Hard & Soft tops

09-18-2001, 11:11 PM	#6
lostboy Registered User Join Date: May 2001 Location: NY Posts: 533 Profile Gallery Classifieds My Jeeps	well...the same thing happened to me out of the blue while i was 100 mies from base. lol ...now anyway...but it turned out to be the igniton control computer was bad intermittently..the problem would come and go ,until one day the engine started backfiring like anything and wouldn't start again...replaced that module ..it can be tested at the dealership....and haven't had any problem since ..also it increased mileage by about 3 mpg..and it gave no indication beforehand that anything was wrong __________________ 89 yj w/ mopar mpi and 4.0 head.94 ax-15 tranny and t-case, more mods comin.