01 2wd 5.9 rough idle, free cam lope?
That's what it reminds me off anyway, a lopey old cam.
It's worse when it's a cold start but it's always there to some extent.
Here's what I have done in the past month. Intake manifold was fixed 3 months ago.
-PCM from Solo
-Crank Postion sensor
- Cam position sensor
- gutted stock cat
The rough idle started about 2 months ago. At that time I did the sparkplugs and it seemed to run better for about a week.
Then about a month ago the truck just died. It ended up being the PCM. When I finally got it fired back up there was a pretty severe lifter noise from the drivers side head close to the firewall. I ran some motor flush through it and changed the oil, added a can of Restore and let it sit. I had a feeling that the cat might be plugged so I didn't want to drive it until I changed it. I ordered a Flowmaster cat from an online place...3 weeks later I told him to cancel that order and I gutted the cat. I've been driving the truck all of this week and there's been no change in the idle quality.
I threw a set of 24lb Ford Mustang injectors on it thinking that maybe one of the stockers was dying since the truck has 160K on it.
There is an exhaust leak on the drivers side as well which I think is at the block/manifold connection. I have a set of gaskets that I'll be install this weekend.
Is it possible that I have a bad lifter that is slow to pump up and even once it's pumped up is still not all the way?
Oil pressure is at like 40psi at idle and 60 psi rolling down the highway.
Could the exhaust leak be the culprit?
Oxygen sensors? They're still the stock ones as far as I know.
any help, suggestions, offers to help push it off a cliff would be greatly appreciated.