Question about 1996 GMC Yukon

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Changed intake gaskets and had to remove distributor. made all marks for rotor and base. got all back together and oil pressure is all the way past 80 and doesnt move. it will start but rough and wont idle just dies. any info would be helpful.

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Hi :) It sound like you are off by a tooth on the distributor gear or the rotor is completely out 180 degrees that will increase the oil pressure because the hose in the cam and crank are not lining up with the pumps pressure timing(there are hole in the crank and cam that have to line up with the block at a certain time.And the motor will run when the rotor is out by 180 degrees but it will backfire up through the intake and run really rough. try dropping the rotor back in at 180 degrees fromwear it is now if it doesn't work put it back and try one tooth out either way.If not you will have to bring number 1 cylinder up to top dead center and set the rotor to number 1 on the distributor buy taking the distributor back out and move the rotor to the proper spot then putting it back in.To find top dead center on number 1 take the drivers side valve cover off and the front two valve spings will have no rocker pressure on them when cylinder 1 is at top dead center.

Posted on Mar 15, 2011

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Sounds to me like your oil sending unit is out. Might want to replace that and that should fix you up.

Posted on Mar 15, 2011


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How to remove distributor on a 1998 gmc pick up with 5.0 engine, do I have to mark anything or just take off bolt and pull out.

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The problem sounds like you did not prime the oil pump before you finished putting everything together. Turn the engine over to were the rotor on distributor is at #1 to fire. Mark the location of distributor base to intake manifold. Pull the distributor out of the intake. With a small pin light look inside the hole and insert a long screw driver into the distributor extensin shaft or use a homemade allenhead wrench welded to a extension rod to turn the pump extension rod. Turn the pump several times until it starts to get hard and the pump will be primed. Turn the distributor extension clockwise to prime pump. Hope this will help you.

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How to change a distributor

Remove the wires and cap making note of which wires go where. Make a reference mark where the rotor is pointing on the intake. Usually a crayon or something similar is pretty effective. Unplug the two distributor connections and loosen the distributor hold down bolt. Move the hold down out of the way and remove the distributor. Reinstall the distributor making sure the rotor points where you marked and that the distributor is seated fully and into the oil drive.

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How do you replace the distributor on an 89 jeep wrangler YJ

Jeep Wrangler/YJ 1987-1995 Repair Guide



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.

Remember rated this post; I hope help you with this.

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