Misfiring engine?

Remove the pin holding the brake light switch on the master rod. The switch will come off when the pin and bushing is removed.

Roy

You can buy seperate plug wires at soem auto parts stores might be a good place to start

If the coolant is missing, we need to determine where it has gone. Is there any evidence of a leak? Have you checked the motor oil to make sure it isn't getting into the engine? Also, has the check engine light come on? Have you refilled the coolant? If so, how long does it take for it to get low again? Finally, is the exhaust from the truck white or light gray in color?

Let me know.

Joe

Ok how did the spark plugs look? Have you checked the spark plug wires? If not ohm them. What was the compression?

Ok so are we talking about the plug wires or the spark plugs themselves? As for the compression not good. What I would like you to do is redo the test one dry and one wet. Now this must be done with the engine warm ok. Now first check compression as normal write down the findings, then do a second compression test with a squirt of oil in the cylinder (through the spark plug hole) write down the findings here too. Get both readings back to me. With compression that low and that spread out you will have a miss that can not be fixed. Just for your info minimum compression is 130 per cylinder, I think we are going to find that the engine is just tired.

Is this compression test done cold or hot? If it is done hot then the engine is just tired as the compression is below 130 which is minimum compression to run correctly. With the compression bumping up that much when wet just confirms the engine is tired. The reason for the random missfire is because of the drop in compression. I can give you test procedures if you like but it will not change much with the low compression. Cam shaft sensor- first check power to it- first disconnect it and then (using the diagram below) check for power at the VPWR term should be 10.5 or better with key on engine off. If it is then computer is doing its job and sensor is getting power. Now check resistance between pwr gnd and ground should be 5 ohms or less. Let me know what you find.

Sorry I must have forgot to include it. Here is the diagram. Again the customer needs to understand that less then 130 psi per cylinder indicates the engine is needing either replaced with a remanufatured engine (better choise) or rebuilding the one in it. Here is your diagram.

Ok OBD2 started in 96 not 95 with a two prong cam sensor then you do not have a hallofect type that all. So if you would give me the production date it may be a late model. Also on an OBD2 system the camshaft sensor is used to determine camshaft position and when cyl 1 comes to tdc for start up. Now using the diagram below for the 96 model year check the restance on term 91 and term 85 between camshaft sensor and pcm connector should be less then 5 ohms.
Now if resistance checks out ok then check sensor output. To do this truck must be able to start and run. Set you volt meter on AC voltage and check while running voltage between pin 85 on the sensor and term 51 and term 103 at the pcm. If voltage vary's more the .1 volt then replace pcm if voltage don't change more then .1 volt then change the sensor.
Also I must ask why did you drain the antifreeze to check the crank and cam sensors? From what I can tell you only need to drain coolant to remove the crankshaft sensor and it can't be tested that way as it needs to be pluged in for some of the tests. Let me know what you find.

Camshaft sensor

PCM