rough idle

[290 Acar]

I haven't disconnected the icp since Friday when I changed the ipr, then the icp, with new Ford parts. After that I ran it 20 min home and it acted the same.

I threw the scanner on it and got these numbers at idle.

icp-475 to 480 psi
icp duty cycle-10%
icp volts-.75 to .83
ipr duty cycle-11%
eot-187
map-14.4
fpw-1.7 to 2.2

Probably TMI, but that's what I looked at. I'm just surprised at how well it runs when you put the boots to it, but when you jump out or stop, it is cranky. Thanks!

[rammertide07]

What type of scanner are you using? ICP DC is the same as IPR DC on most scanners I've seen. But they are probably using the same PID. ICP is a little low. I'm having kind of having the same issue. Mine stumbles when I lightly accelerate, mainly after it first starts up. But runs smooth when I get on it... especially with this cool fall air coming in. I'm kinda stumped right now with mine. I'm thinking the IPR or ICP....leaning more toward the IPR though. There's a part of the IPR, screen....filter???, that can cause it not to close all the way if it gunked up.

[290 Acar]

The scanner here at work is a Matco Determinator which is basically an OTC Genisys product. I had run the scanner on the Ex before i started all this work to check the HPOP health. Since it came out great i did not change the pump which has about a 140 thou on it.

The icp seemed low to me also, but I thought I saw on Dieselman's page where he listed idle pressures of 400 to 500 psi?

Thanks