ICP Issue

Reply Subscribe

Thread Tools

Search this Thread

Apr 13, 2019 | 12:57 PM

brianford problems

Thread Starter

New User

Joined: Apr 2019

Posts: 7

Likes: 0

ICP Issue

2004 6.0 F350; Had bad injector #1 so i tore it down and replaced it. Well, now with ICP plugged in it turns over hard and seems to make the starter jump. With it unplugged it starts fine just has low power from the start, no boost.

I replaced the ICP and pigtail and have the same issue. Has left me scratching my head, any ideas?

Apr 14, 2019 | 07:18 AM

bismic

Fleet Owner

Joined: Nov 2003

Posts: 27,916

Likes: 3,636

Get a scan tool so you can post some numbers. We need to know actual ICP pressure and voltage. Also would be good to see the codes. Recommend ForScan Lite on a smart phone.

Apr 14, 2019 | 11:15 AM

brianford problems

Thread Starter

New User

Joined: Apr 2019

Posts: 7

Likes: 0

Quote:

Originally Posted by bismic

Get a scan tool so you can post some numbers. We need to know actual ICP pressure and voltage. Also would be good to see the codes. Recommend ForScan Lite on a smart phone.

Here are the numbers obtained;

KOEO
ICP voltagew is 3.82

With ICP connected cranking:
ICP desired 976
ICP Actual 3350
IPR 45

ICP Disconnected
ICP Desired 940
ICP Actual 966
IPR 35

Apr 14, 2019 | 11:55 AM

bismic

Fleet Owner

Joined: Nov 2003

Posts: 27,916

Likes: 3,636

Your ICP sensor and/or wiring is STILL bad. No way your cranking ICP pressure is that high.

Apr 14, 2019 | 12:12 PM

brianford problems

Thread Starter

New User

Joined: Apr 2019

Posts: 7

Likes: 0

When the ICP is plugged in and I try cranking the starter spins for about two seconds and then it skips on the flywheel like it is locked up.. If the the ICP is bad now with the second one in with the same issue, and nothing other than replacing the #1 injector, I don't get it. Could the IPR not be opening enough to bleed the oil down to manageable range?

Thank you for your thoughts on this as I have not had this issue before. Had many others including not enough pressure but never too much.

Apr 14, 2019 | 12:16 PM

brianford problems

Thread Starter

New User

Joined: Apr 2019

Posts: 7

Likes: 0

Another thought, if the ICP or wiring is still bad and the number is incorrect, why would the cranking issue of skipping on the flywheel occur?

Apr 14, 2019 | 01:42 PM

bismic

Fleet Owner

Joined: Nov 2003

Posts: 27,916

Likes: 3,636

Make sure you wired up the ICP sensor connector properly. Typically the IPR will fail open when it fails, but it would be worth an inspection.

It may be that you have a base engine issue as well as the ICP reading being bad.