I'm having a problem with my 95 PSD where it seems to be missing a bit. Still lots of power, no smoke, no codes. It was just missing on acceleration and pulling at first but now it's pretty much all the time. I took it to the Ford dealer they scanned it and did diagnostics including an injector self test (which I assume is a buzz test). They wanted to do a compression test for $700 so I brought the truck home and did my own compression test and all of the cylinders but one had over 400 pounds. Cylinder six has about 360. I put a tablespoon of oil in the cylinder and the compression shot right up to over 410. According to my book all is within tolerance compression-wise but I'm wondering if this could still be causing the unbalance in my engine. I've read somewhere that an injector shooting too much fuel into a cylinder can wash it down and cause this loss of compression but I would've guessed I would see some smoke if that were the case.
Another thing I've noticed my DC voltage drops pretty low when I turn on the key and down to 10.5 V when I turn the ignition. It takes a little while but after it started the voltage goes up to a nice healthy level. It does shake pretty bad when I first start up.
So far I have replaced all the glow plugs, cam position sensor, fuel pump, fuel filter, air filter, alternator, battery, thermostat(the truck was never warming up into the normal range and now it is). The glow plug relay seems to be working. I pulled the pressure sensor connector and it did not seem to have any profound effect. It does need a water pump as I can feel the fan rocks back and forth a bit.
When I first opened the valve cover on the driver side I found number eight glow plug had broken open and the innards were shorted against the head. The glow plug was not screwed in all the way and I thought I'd found my problem but fixing this really didn't help. I replaced the valve cover gasket and VC wiring harnesses on that side as they were melted a bit at the glow plug connection. I did not replace the incoming side of the VC harness as there was only slight melting on the glow plug connection. They did come with my valve cover gasket. I assume you have to snip off the old one and use crimp connectors to splice it into the old wiring harness. Didn't want to do that if I didn't have to.
This is my first diesel truck and I really like it. It's in perfect condition except for this one thing and I'd sure like to get it running smoothly again. Would appreciate any suggestions or things to try, but being in 1995 model it's probably not worth throwing too many dollars at.
Another thing I've noticed my DC voltage drops pretty low when I turn on the key and down to 10.5 V when I turn the ignition. It takes a little while but after it started the voltage goes up to a nice healthy level. It does shake pretty bad when I first start up.
So far I have replaced all the glow plugs, cam position sensor, fuel pump, fuel filter, air filter, alternator, battery, thermostat(the truck was never warming up into the normal range and now it is). The glow plug relay seems to be working. I pulled the pressure sensor connector and it did not seem to have any profound effect. It does need a water pump as I can feel the fan rocks back and forth a bit.
When I first opened the valve cover on the driver side I found number eight glow plug had broken open and the innards were shorted against the head. The glow plug was not screwed in all the way and I thought I'd found my problem but fixing this really didn't help. I replaced the valve cover gasket and VC wiring harnesses on that side as they were melted a bit at the glow plug connection. I did not replace the incoming side of the VC harness as there was only slight melting on the glow plug connection. They did come with my valve cover gasket. I assume you have to snip off the old one and use crimp connectors to splice it into the old wiring harness. Didn't want to do that if I didn't have to.
This is my first diesel truck and I really like it. It's in perfect condition except for this one thing and I'd sure like to get it running smoothly again. Would appreciate any suggestions or things to try, but being in 1995 model it's probably not worth throwing too many dollars at.