1992 Jimmy Diagnostic codes

[valvini]

My 1992 Jimmy, 4 x 4 , 4dr, has had the ABS light on for about two weeks.
Then last night when I parked her, all of a sudden the idle started running very rough. It is fluctuating between 800-1000 rpm and wants to stall.

I put a code reader on it and it gave me 12, 45, 65, 67, 44, 41, 42, 51, 52. I have no idea where to start troubleshooting.

Any help will be greatly appreciated.

[rlith]

Originally Posted by valvini

My 1992 Jimmy, 4 x 4 , 4dr, has had the ABS light on for about two weeks.
Then last night when I parked her, all of a sudden the idle started running very rough. It is fluctuating between 800-1000 rpm and wants to stall.

I put a code reader on it and it gave me 12, 45, 65, 67, 44, 41, 42, 51, 52. I have no idea where to start troubleshooting.

Any help will be greatly appreciated.

44 and 45 are bad 02 sensor codes
I don't have the 65 and 67 listed
42 is a bad EST (ignition module)
51 is a bad prom or memcal in the ECM

First start by taking off your upper plenum and looking for washing. More than likely you are dumping raw fuel because of a CPI and/or nut kit leak.

Replace the ignition module under the cap, swap in a new cap and rotor while you're at it.

Check your fuel pressure at the shrader valve. It should be 56-60 at start, 61-65 at running. If it's not your fuel pump may be dying. (causing the code 44 lean condition)

[valvini]

Hi,

This is my first time working on this vehicle. As you suggested was trying to check in plenum for regulator. However, I could not get the damn top off. All the bolts have been removed but it wont budge.

I dont want to ding up the aluminum with a screw driver. Whats the preferred method to loosen it up?

Thanks

[rlith]

You have 9 bolts to remove, then grab it back by the hose that goes to the brake booster and pull straight up...it will seperate from the gasket