Attention: TDR Forum Junkies Heres the story:
A couple of weeks ago I installed a stage II CP3, it made noise and didn't provide good rail pressure. Sent the pump back and installed another one (Stage II).
The second one would not maintain rail pressure during high fuel loads. Changed the FCA, and then the pump would provide good rail pressure except during a hard run in O/D. I changed the rail relief valve from a good running truck with no change.
I then put the stock pump back on, and now when I start it when it is cold enough to have the grid heater run, it stumbles at idle and the rail pressure fluctuates from about 3k-8k PSI. If I don't let it warm up for about 5 mins it will usually die at least once.
As soon as the truck is warm it runs fine, however, if I really feel for it I do notice the rail pressure fluctuating while cruising and the truck just slightly surging.
Any ideas? FCA still? CPS? something else?
Thanks in advance.
A couple of weeks ago I installed a stage II CP3, it made noise and didn't provide good rail pressure. Sent the pump back and installed another one (Stage II).
The second one would not maintain rail pressure during high fuel loads. Changed the FCA, and then the pump would provide good rail pressure except during a hard run in O/D. I changed the rail relief valve from a good running truck with no change.
I then put the stock pump back on, and now when I start it when it is cold enough to have the grid heater run, it stumbles at idle and the rail pressure fluctuates from about 3k-8k PSI. If I don't let it warm up for about 5 mins it will usually die at least once.
As soon as the truck is warm it runs fine, however, if I really feel for it I do notice the rail pressure fluctuating while cruising and the truck just slightly surging.
Any ideas? FCA still? CPS? something else?
Thanks in advance.
