Question about 1986 Jeep CJ7

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1986 jeep cj7 4 cylinder engine timing

How do you by-pass the computer to set the timing on a 1986 jeep cj7 4 cylinder?

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As far as I know, timing is "fixed" and cannot be adjusted on that one. To verify see if your distributor has an integral holddown not a seperate piece as you would find on an adjustable one.

Posted on Feb 26, 2009

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Spark plug gap setting for a 1986 Jeep 258 ci straight 6 engine.


a blast from the past... 1986 jeep , with no name, 1 of 7models....
ill roll the dice for yah. J10 jeep, 4.2L
i think NGK covers that, did you look i there free on line eCAtalog.
0.035"

as seen here.
http://www.partcat.com/ngk

id look it up in mitchells but no car stated,
CJ7 and Grandwagoneer show same,
35 THOU

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Timing on a 1986 Pontiac Parisienne


It depends on which distributor you have. If you have one with a vacuum line going to it, simply remove the line from the distributor and plug it off so it won't leak. start the engine and time it the conventional way with a timing light hooked to #1 cylinder wire, which is the front one on the driver's side.

If you have the HEI set-up, with the coil in the top of the distrbutor, then connect a Tach to the TACH terminal on the distributor and the other lead to battery negative, UNLESS the instructions for the tach you are usung specify different. Some tachs will specify Tach term inal and battery Positive.

Oct 18, 2014 | 1986 Pontiac Parisienne

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Ask where is asd fuse located on 90 jeep cherkoee


old post and is key question on old jeeps
no engine stated. guess 4L
the ASD began 1990 to present.
the ANSWER IS BELOW.
the car did not have and ASD until your car was 100% Chrysler EFI. The goofy French EFI has none .
ASD and the 3 second rules and 6 to 8 failure classes to trip it.
none. some jeeps changed in 1993,


  • 1986 - Renix TBI available on Jeep 2.5 L four-cylinder engines.
  • 1987 - the new Renix controlled 4.0 L six-cylinder engine was rated at 173 hp (129 kW; 175 PS) and 220 lb·ft (298 N·m) of torque.
  • 1988 - 4.0 L output increased to 177 hp (132 kW; 179 PS) and 224 lb·ft (304 N·m) of torque, due to higher compression ratio. Renix still TBI
  • 1989 - Changed to Renix MPFI. (4 injectors now)
  • 1991 - Chrysler Corporation (then the owners of the Jeep brand replaced the Renix control system with OBD-I-compliant control electronics, the Chrysler HO EFI) with check engine light.(and flash codes)

Jul 02, 2014 | 1990 Jeep Cherokee Limited

1 Answer

Timing proceedure 1986 ford mustang 5.0


To set the ignition timing on 86 mustang, get a white crandon or white paint. Find dampener on the crankshaft behind the serpentine bell. Between to 0 and the 20 there is a 10 mark. Use the white crandon or paint to mark this. Hookup your timing light, to the battery and to cylinder number one on the distributor. On this side of the distributor where the wiring harness goes in there are two more wires hanging down from the harness. This is your spout plug connector. Remove it because with this in the computer will keep adjusting the timing by itself and you will not be able to set the timing. So with the spout connector removed and the engine warmed up adjust the timing with the engine running and the timing light pointed at the dampener aligned the pointer up with the number 10 that you have marked. Do this by turning the distributor back and forth until you achieve the correct timing. To do this you must loose and the half inch bolt on the distributor hold down, when you're done retighten this bolt. Good luck.

May 07, 2010 | 1986 Ford Mustang

1 Answer

Set timiing


You have a "locked" distributor. There is no adjustment. All timing "decisions" are made by the computer after reading the info from the sensors on the engine. Ones that influence timing most are the throttle position sensor and Manifold air pressure (MAP) sensor, though all play a part.

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Is there a diagram showing the location of the slave cylinder on a 1986 jeep cherokee / 2.5I4?


Follow the line from the clutch master to the slave. Its within a 3 foot distance.

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1986 Ford LTD 5.0 engine; Failed HC emissions. Did tune up, new air filter,oil change. 2 bottles of HEAT and 1 bottle of Guarantee to pass. HC came back 2.90 passing is 2.50. What could it be.


Heat is pretty much methanol...it will counteract the effects of the other additive you used. Run that stuff out of there and try using 3oz of acetone per 10 gals of fuel and possibly adding a couple of degrees more advance to the timing. If you know anyone with a gas analyzer, perhaps they can help you get it set up.

Jul 09, 2009 | 1986 Ford LTD

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2000 Jeep Cherokee engine light stays on


HAVE YOU REPLACED THAT PLUG AND PLUG WIRE,FIND NO3 CYLINDER AND PULL THAT WIRE OFF SEE IF ILDE OF ENGINE CHANGES IF NO THEN YOU MAY HAVE BIGGER PROBLEM BUT DEFINITELY CHECK FOR SPARK WITH WIRE ON PLUG ITSELF.

May 07, 2009 | 2000 Jeep Grand Cherokee

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