Hi everyone, for the last week or so when my truck is cold it lopes for a bit until the coolant temp gets up to about 100 degrees. At idle the rail pressure bounced around from 4.1 to 4.6. I've noticed that at WOT it won't hold full rail pressure either. I changed the fuel filter and had my balance rates tested at a shop. They all tested within spec. It had been in the 40s and 50s in the morning when I start my truck so it's not all that cold outside. Any ideas???
LBZ: Loping idle
- Thread starter Jon7891
- Start date
3 days ago. I filled the filter with sea foam when I changed it. It didn't seam to make a difference.
Says he just changed it.
Op, I had a sticking fpr that would cause max rail pressure at idle. I ran 2 cans of sea foam through the tank and a quart of 2 stroke oil and that cleared it up. Held the rpms at 2000 for about a minute and haven't had any issues in 3 years.
Treed... try some 2 stroke oil next
Op, I had a sticking fpr that would cause max rail pressure at idle. I ran 2 cans of sea foam through the tank and a quart of 2 stroke oil and that cleared it up. Held the rpms at 2000 for about a minute and haven't had any issues in 3 years.
Treed... try some 2 stroke oil next
I have some sea foam in the tank right now.ill keep running it and try some 2 stroke next. Thanks for the tip!
Ok so today I went to start it and it wouldn't start. It had lost its prime. After priming it a couple of times I got it to stay running long enough to move it in the driveway.
They aren't too bad. I don't see any leaks or anything. When it did finally fire it blew a bunch of white/ grey smoke
As the truck is loping the fuel pressure is bouncing from 5.2k to 7.1k. According to the cts the desired rail pressure is 6.2k