Thank you everyone for such an awesome site, I spend some time on this site almost every day reading up on stuff!

Why does my truck idle up even though the EBPV was disabled?

I have a 2003 7.3 f250 FX4 CC SB. I unplugged the EBPV over the weekend but today I walked out to my truck after i left it running for a bit and it had kicked up the idle to about 1000 rpms. I have a TS performance chip with stock, 50hp, 75hp, 100hp, high idle, and no start. The chip was set on the 75hp setting. Does the truck naturally go into a high idle with cold temps even though the EBPV was disabled? I live in central Texas and it doesnt usually get very cold down here but it has over the past few weeks.

Thanks in advance for your info!

 

Yes it does. There are two parts....Idle up, EBPV close. One does not depend on the other...just don't get the same warm up effect like you would if the EBPV was still connected. The idle going up is not just for warm up tho...it also helps prevent fuel stacking on the valves and the cooling system on these trucks will actually cool down the truck if in low idle too long, below normal.

 

Thank you!

 

Disconnect the IAT (intake air temp) sensor in the filter box, and it will not go to high idle, since it uses that along with oil temp to determine if it should idle up.

 

Sounds like you would want it to idle up!

 

You're right, I do. I was just wondering why it did it. I had originally thought it would't once I disconnected the EBPV. I don't mind it at all, just learning why it does it. Thanks for everything! I love this site for all of the information and the willingness for all of you to help each other.

 

Heres another question perhaps ya'll can answer for me.

I usually don't let the truck idle for long, I just get in it and drive (slow on acceleration at first). On most cold days, the truck seems to run higher RPMs while driving at 50 - 60 mph (about 2000 rpms at 60) until it warms up. Is this also normal? As I said above the EBPV is disabled. I am running Rotella T6 5w40 synthetic in the truck right now. EGTs seem normal at about 600 when it does this. Once the truck gets warm the RPMs drop back to normal (1800 or so at 60-65).

Heres some details on the truck

2003 f250 cc sb 7.3, S&B intake, 4 inch diamond eye turbo back exhaust, TS performance chip stock, 50, 75, 100, high idle, no start, boost, pyro and trans temp gauges, hutch/harpoon mod with spin on pre pump filter.

 

I belive frank asked a similar question and the answer was the torque converter slips to help get the trans up to temp.

 

No slip, just no lock-up!

 

Thanks for the info!