Well boy's im in need of some help again.My truck has been (running off) kinda stumbling when i am driving. Got a buzz test done and good news is all past the test. Did the cylinder contribution test and not good news. Cyliners 3,4,and 7 are not helping the motor run (failed the test). The truck has 360,ooo mi on her but does not burn oil and does not smoke out tail pipe. Any help? I hope it is not rings,could the injectors be bad but pass the buzz test?
I'm having the same problem as you. Just bought another powerstroke last week. It's a 96. Was driving it on the highway yesterday and went to put the hammer down and didn't get anything. It almost feels like I'm not getting any power from the turbo. Mechanic told me to check the warm up valve incase it's stuck close but it seems to be working fine. Was thing It might not be getting enough fuel. Or was thinking the injectors are ****ed. But it still seems to be running okay. Thought it would run pretty rough if it was Injectors.
^^not likely the warm up valve. Normally if it was you would be having problems right from a stand still. Feels like your towing a anchor because its acting like an exhaust brake. Could be a clogging FPR screen easy to check and make sure to add it to your bi-yearly truck inspection. Could also be map sensor, boost leak, weak HPOP and/or IPR valve, weak/clogging injector/s, and slight chance CPS.
yes!!!! Sorry I should have updated this thread. Cleaning the fpr screen made NOTICEABLE difference in the starting, idling, reving, and driving characteristics of the truck. I think mileage went up a bit also.
I know this was old news and brought back but thought I would comment since I noticed it on the recent list.
If you check this thread out that I started, I put in there some info from Ford (An old TSB) about injector O-rings. If you go about 1/3 of the way down, you will notice a post on this page from me with some vids in the post but at the bottom of the post you will notice the TSB bulletins I am referring to.
Although this may not fix your issue, it could be a possibility. The O-rings were notorious for having issues back in the day when I was a Ford tech.
Thank you, but I am one of many on here that do their best to lend idea's and information to those that ask. Sometimes I'm on the ball other times I'm not so great. I'm happy that you are happy with your truck.
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