20 Most Recent 1992 Jeep Wrangler - Page 4 Questions & Answers

No photo, but if you follow the line from the master cylinder for the clutch down to the drivers side of the bellhousing, you will either find a slave unit with a bleed valve (looks like the one they use on brakes) or the line will go right into the bellhousing with another line with a valve on it coming back out right next to it.
Check the master for seepage into the passenger compartment at the firewall, check the line and check the slave cylinder for leaks. the only way air can get into the system is if something is leaking and permitting air to get in.

Here's a link to the vacuum diagrams.http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0900c152800a9b87

it does happen that the bulbs burn out and you never noticed the first one burn out so check for power to the bulbs and then check the fuses the head lights are on a different fuse then the parking lights

could be relay or a 4x4 fuse bad ground damaged wires

If the check engine light does NOT come on when cranking, at the times when it won't start, and the relays are clicking and buzzing, then your ECU is in need of repair. The engine will only start after the check engine light comes on and the ecu is what controls that. ECU is likely going bad, causing the delayed start problem typical of early 90's jeeps. Reasonably priced repair or replacement services for your jeep ECU are available on ebay.

It will not keep it from cranking, but it will prevent the engine from starting.

run a mechanical oil pressure test, if it agrees with gauge then it is a mechanical condition, if nor check for defective sending unit. typically sending units go out more often than guages go out.

maybe earth strap to chassis from engine. put a multi meter from battery neg to engine, set it to DC volts and crank the engine. should read 0 volts if ok. will read about 12 volts if earth is knackered.

Most likely the coil pack, check your ignition fuse first and then ensure you have good power and ground first, then look at the pack.