1987 gmc s15 engine disturbed will distrubuter was out. cant find poshoin of rotor at top dead. its a 2.8 by the way

How good is the compression ?

Your supposed to make a mark all that before you pull the distributor. Did you mark the relationship between distributor body and engine? Then you note where the rotor is pointing, make a scratch mark. When you reinstall the distributor, line up all the marks.

If engine was turned with distributor out, You need to put the #1 piston on tdc of compression stroke. Stab the distributor, which ever spark plug tower the rotor is pointing at/turning into, becomes number 1. Then you follow the firing order around the cap in clockwise direction.

Best bet, go to your local parts store and pick up a haynes manual, but i can offer my advice if you dont want to do that, first make sure your ignition parts are all good, coil cap rotor, then make sure your firing order is correct, (again haynes manual would be helpful,) then if that fails loosen the distribitor enough you can turn it but not loose enough it would turn on its own, bring your number one cyilinder up to TDC (TOP DEAD CENTER) <(the top of the compression stroke, you do this by getting a buddy to help you, remove the coil wire take the number one spark plug out and USE ONLY YOUR FINGER, cover the hole and have your buddy bump the key untill the compression blows your finger out of the hole, then verify the rotor under the distributor cap is pointed at the number one plug wire on the cap. Again the haynes manual would be a great investment as it explains all this in detail and even has pictures too. good luck and let me know if that helped

Check for play in distributor rotor shaft as they get worn out and need replacement. Remove distributor cap and hold the rotor from top and try to move it, ideally it should not move sideways.

you can get a wiring diagram from the chilton repair manuals.FYI they are free through any public library online

This could be air or fuel, if you are getting a mass air flow code then make sure there are no vacuum leaks around the intake also if the distributor is in wrong depending on how far off it is it could run but will run bad and will stall out, did you mark the distributor housing and also where the rotor was pointing as it is very important that the distributor rotor is point in the same spot as it was coming out if not then you will need to set the engine at top dead center and then locate the #1 cap location and install the dist rotor to be pointing to that wire,,top dead center is with #1 cylinder at the top of the compression stroke, make sure before you do that that there are no leaks try to keep it running by holding the gas pedal while someone look for a vacuum leak, you will hear a hissing sound for a vacuum leak, good day.

Remove the wheel on that side. Remove the motor mount bolts and jack up the engine. You will be able to get it out.

check the fuel pressure this year truck known for bad fuel pumps especially after 80k

I don't know that specific vehicle, but if its a hydraulic clutch it sounds like either you have a leak and your clutch fluid is low, or the master or slave cylinder could be bypassing internally. Check the fluid level in your clutch master cylinder. If its low, you should top it off with brake fluid and will probably have to bleed the system. Also look for leaks. You can probably find info or a video online of how to bleed the system. Its a bit hard to explain without illustrations or pictures. Not really very difficult to perform. Good luck.

Jeep Wrangler/YJ 1987-1995 Repair Guide

DISTRIBUITOR
REMOVAL & INSTALLATION

2.5L Engine
1987-90 VEHICLES
See Figures 1, 2, 3 and 4




Fig. 1: Exploded view of the distributor-1987-90 2.5L engine






Fig. 2: Positioning the oil pump shaft for distributor installation-1987-90 2.5L engine






Fig. 3: Positioning the distributor rotor and shaft for installation-1987-90 2.5L engine








Fig. 4: Rotor position with the distributor properly installed-1987-90 2.5L engine

1. Disconnect the negative battery cable.
2. Remove the primary lead from the terminal post at the side of the distributor.

The wire connector will contain a special conductive grease. Do not remove it. The same grease will also be found on the metal parts of the rotor.

1. Disconnect the vacuum line if there is one.
2. Remove the two distributor cap retaining hooks or screws and remove the distributor cap.
3. Note the position of the rotor in relation to the base. Scribe a mark on the base of the distributor and on the engine block to facilitate reinstallation. Align the marks with the direction the metal tip of the rotor is pointing.
4. Remove the bolt that holds the distributor to the engine.
5. Lift the distributor assembly from the engine.

To install, if engine was not disturbed:

1. Insert the distributor shaft and assembly into the engine. Line up the mark on the distributor and the one on the engine with the metal tip of the rotor. Make sure that the vacuum advance diaphragm is pointed in the same direction as it was pointed originally. This will be done automatically if the marks on the engine and the distributor are line up with the rotor.
2. Install the distributor hold-down bolt and clamp. Leave the screw loose enough so that you can move the distributor with heavy hand pressure.
3. Connect the primary wire to the distributor side of the coil. Install the distributor cap on the distributor housing. Secure the distributor cap with the spring clips or the screw type retainers, whichever is used.
4. Install the spark plug wires. Make sure that the wires are pressed all of the way into the top of the distributor cap and firmly onto the spark plugs.

If the engine was turned while the distributor was removed, or if the marks were not drawn, it will be necessary to initially time the engine. Follow the procedure below.
To install, if engine was disturbed:

1. Rotate the engine until the No.1 piston is at TDC compression.
2. Using a flat bladed screwdriver, in the distributor hole, rotate the oil pump gear so that the slot in the oil pump shaft is slightly past the 3:00 o'clock position, relative to the length of the engine block.
3. With the distributor cap removed, install the distributor with the rotor at the 5:00 o'clock position, relative to the oil pump gear shaft slot. When the distributor is completely in place, the rotor should be at the 6:00 o'clock position. If not, remove the distributor and perform the entire procedure again.
4. Tighten the lockbolt.

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