1997 6.5 runs rough when cold
#11
6.5 runs rough when cold
With the optical sensor unplugged the engine would not start. It yielded codes P0251 and P0370. When I plugged it back in the engine started and ran rough, as before.
With the engine running at idle, 740 rpm, I unplugged the IAT sensor. The rpm increased to 840, but no codes. When I tried to increase the rpm it was very rough, as usual at around 1500.
---AutoMerged DoublePost---
Correction. It was the coolant temp sensor (the one on top of the engine) that I uplugged, which resulted in the 100 idle-rpm increase, not the IAT sensor as I wrote above.
With the engine running at idle, 740 rpm, I unplugged the IAT sensor. The rpm increased to 840, but no codes. When I tried to increase the rpm it was very rough, as usual at around 1500.
---AutoMerged DoublePost---
Correction. It was the coolant temp sensor (the one on top of the engine) that I uplugged, which resulted in the 100 idle-rpm increase, not the IAT sensor as I wrote above.
Last edited by rcrossf; 04-18-2012 at 05:45 PM. Reason: Automerged Doublepost
#12
I'm beginning to think its the IP but not ready to say for sure yet.
Have you checked the electrical grounds on the passenger rear of the intake yet?
Long shot, but it costs nothing more than about 5-10 mins to check.....
Sent from my iPhone using Tapatalk
Have you checked the electrical grounds on the passenger rear of the intake yet?
Long shot, but it costs nothing more than about 5-10 mins to check.....
Sent from my iPhone using Tapatalk
Last edited by great white; 04-18-2012 at 08:18 PM.
#13
6.5 runs rough when cold
When I replaced the fuel injectors I "discovered" that the #8 fuel injector was "stuck" to the fuel line, so I was compelled to pull the intake manifold so as to be able to replace the #8 fuel line [after I cut the line to get the injector out]. So I made sure to securely reattach all the grounds that were connected to the intake manifold.
I too am getting that feeling that the IP needs replacement, though I am surprised that it's not throwing a code. If I do replace the IP I will replace the timing chain and gears as well.
Thanks for your input. I appreciate your help.
I too am getting that feeling that the IP needs replacement, though I am surprised that it's not throwing a code. If I do replace the IP I will replace the timing chain and gears as well.
Thanks for your input. I appreciate your help.
#19
What was the fix?
Did a new injection pump solve it?
I'm having the same problem and I'm still testing stuff. My problems get worse as the outside temp decreases. 20f or below gets real bad, below zero it's pretty much un-drivable as I cannot get it to rev over about 1800 rpm. That makes for a very slow ride 12 miles to/from work.
Did a new injection pump solve it?
I'm having the same problem and I'm still testing stuff. My problems get worse as the outside temp decreases. 20f or below gets real bad, below zero it's pretty much un-drivable as I cannot get it to rev over about 1800 rpm. That makes for a very slow ride 12 miles to/from work.
#20
Join Date: Oct 2012
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What was the fix?
Did a new injection pump solve it?
I'm having the same problem and I'm still testing stuff. My problems get worse as the outside temp decreases. 20f or below gets real bad, below zero it's pretty much un-drivable as I cannot get it to rev over about 1800 rpm. That makes for a very slow ride 12 miles to/from work.
Did a new injection pump solve it?
I'm having the same problem and I'm still testing stuff. My problems get worse as the outside temp decreases. 20f or below gets real bad, below zero it's pretty much un-drivable as I cannot get it to rev over about 1800 rpm. That makes for a very slow ride 12 miles to/from work.