Join Date: Apr 2016
Feedback Score: 0 reviews
Thank you much for the information!
I will check the connection as soon as I get a chance.
I did change the #8 injector, which ended up being a fairly easy fix. The truck had a bad misfire and was bellowing black smoke at idle, so as soon as I saw that I shut it down and parked it until I could change the injector. I got it fixed, cycled the starter a handful of times with the wire on the passenger side to prime the oil rail. Turned the key and it started right away, a few seconds longer crank than usual but not what I expected. Once it warmed up it started puffing grey smoke, leaving a trail behind me so I quit driving it again figuring I messed something up. Talking with a friend we decided that maybe the stuck injector had coated the exhaust with diesel and that was burning off. I took it for a few miles on the highway and it cleared right up. I put about 50 miles on it over the next week and everything was running great! The first 2 or 3 times starting it after the injector it cranked a second or two longer than normal, but that cleared up after a 10 mile drive. I put probably 50 miles on it over the next week. Once it did crank a long time and took two tries before it started, but it did well again for a few days.
The other day I drove it about 5 blocks to the parts store, ran inside to pick up a new degas container I had ordered. I left it run while I was inside, about 5 minutes, then I drover 4 blocks to where my son was doing some mowing. I shut it off for about 20 minutes, went to start it and it just cranked. Got it towed home and plugged it in to my computer with forscan. Before I did that I cleaned the battery posts and checked voltage in each battery. I had the low voltage issue a year or two ago causing a no start.
I checked the numbers on forscan and found I had 48 volts to the ficm so ruled that out. Here are the numbers I got, not sure if it is all what I need.
Key on, engine off,
FICM lpwr volt 12
FICM mpwr volt 48
FICM vpwr volt 12
FICM sync no
ICP Volt 23
ICP KPA 0.0
I got the fault code so stopped there. I was running behind so I didn't write down the numbers for the crank no start. From memory everything was the same as key on engine off except the ficm sync said yes, IPR said 85. I do not remember what I was getting for ICP, but believe it was below 500.
The next morning I turned the key to gather the numbers I had missed. The engine cranked and started like nothing was wrong. I shut it off and restarted it a few times, it started and ran. So I let it idle for 20 minutes, shut it off and it wouldn't start. Again I don't remember all of the numbers but do know the IPR was at 85.
I let it sit 15 minutes and it started again. I cleared the trouble code, and it stayed cleared. I ran a check again,
with the engine running
ICP Volt .82
ICP kpa 4000
ficm sync yes
Since then I have been driving it, and it has been fine. No starting issues. I haven't left town with it just in case. I need to go on a 200 mile road trip next weekend but I am too afraid to take the pickup in case it leaves us stranded!
Is it possible to change the IPR without the special socket? It looks like a fairly easy repair once I decide if that is the problem. I will check all of the wiring tomorrow to make sure it isn't something simple. I have seen many times where a loose connection or a small short in a wire can give off some strange symptoms!
Any input on my numbers posted would be appreciated, or if I have missed checking something. I did finally figure out how to change my forescan from metric to normal, so the JPA now reads PSI. According to Google conversion 4000 kpa equals about 580 psi. Once I switched it to Impeerial from Metric it was showing 500 psi. Not sure what it showed on the crank no start, I did not write it down. I did save the data in forscan so maybe I can replay it if it would help.