Engine Won't Start - 91 YJ

CANADIANJOKER

MEMBER
1991 JEEP WRANGLER

Just bought a project 91 YJ 4.0 with 155 000k, and it was running fine.

After a few days, the engine wouldn't start. It would turn over, but just woudln't fire. It seemed it would only start if I left it alone for abit. Now it won't catch at all.

I had just replaced the spark plugs, and had the battery checked. I thought it was the ignition coil, and replaced that, but no joy. Air filter is cleaned, and I tried dropping some gas in the carb aswell.

I think there was a problem with the master cylinder, would this have anything to do with it refusing to start?

3 Replies

RASMATAZ

MECHANIC
75,992 POSTS

This Joker is wild, you must be from Whitehorse in the Yukon lol.

Tell me you're joking with the master cylinder.

Lets start, disconnect a sparkplug wire take a screwdriver stick it in the plugwire end and ground it to the engine be careful here it might bite you-have someone crank the engine over while looking for spark on it. Do you have it..

Meantime am gonna have me a

and

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Tuesday, August 21st, 2007 AT 4:35 AM

CANADIANJOKER

MEMBER
3 POSTS

Just trying to give you all the information possible, I didnt think it was the master cylcinder, but im no expert.

The jeeps not at my place, Ill go down today and check for a spark. If I can't diagnose the problem, i'll take it to a shop, but I wanna do as much as I can myself. Learn as I go type deally

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Tuesday, August 21st, 2007 AT 12:41 PM

CANADIANJOKER

MEMBER
3 POSTS

Still havn't got the chance to check the plugs, but heres an update.

The ignition coil may have fixed the first problem. After that, I poured fresh gas in the carb, and it started, now it will start sometimes, and ill have to bum start it others.

No idea why it would start sometimes, and not others though. Not getting enough fuel? Or could it be old fuel still trying to run through it?

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Thursday, August 23rd, 2007 AT 9:45 AM