ICP & EOT

***907DAVE*** · #1 Sat, January 1st, 2011, 09:53 PM

Recently I was having some issues trying to adjust ICP when the engine was cold. I was having problems dropping ICP, no matter what I did it did not seem to have any correlation to what I was asking it to do. As soon as the engine warms up I have no problems getting things where they need to be.

I see there is a ICP offset VS EOT function. This could explain why I was not able to get the ICP where I wanted it, but the temperature range it works in does not seem to be right, and it raises more questions.

According to the function the ICP will be offset 1300 psi when the oil temp is above 54*F.

Is this a problem with the definition, or am I missing something here?

Pocket · #2 Sun, January 2nd, 2011, 03:58 PM

What exactly are the issues? How far is your ICP dropping? Or specifically, is it being limited to a maximum pressure that is below the max you would see on a fully warm engine?

F-127 · #3 Sun, January 2nd, 2011, 10:38 PM

Hmm, I haven't really done any cold weather and/or engine tuning but just had a thought. What is MFD at when at an idle when cold? Could that possibly be raising itself up past a the normal 'idle area' of the ICP desired map?

I've wondered about the ICP offset vs. EOT myself but hadn't had a reason to question it before.

***907DAVE*** · #4 Sun, January 2nd, 2011, 10:42 PM

Quote:

Originally Posted by Pocket

What exactly are the issues? How far is your ICP dropping? Or specifically, is it being limited to a maximum pressure that is below the max you would see on a fully warm engine?

There is no real big issues, I was experimenting a bit and noticed I could not drop ICP any lower than 550-575 PSI on a cold engine.

These injectors are not too stable at low PW, so I was attempting to drop ICP a tad to see if it would help smooth out the idle......which is actually pretty smooth, but just seeing if I could get it any better.