CEL - Idle Higher than expected????

denver · Sep 6, 2008, 02:45 PM

I just switched to e85 today, on a pretty much stock car. I have 660cc injectors (which are just barely big enough for the stock turbo and stock boost, Im waiting on some 1000cc to come in) walbro 255HP.

I am getting a repeated CEL - "Idle higher than expected", has anyone else had this?

On a side note, it is running really well, the more I tune it, the better it gets. I did get some very funny looks that the e85 pump while I was scaling the injectors etc

. I just put in 5 gallons then pull off to the side to play with scalings, and once I was sure things were ok, I pulled back to the pump and added the remaining to fill the tank

denver · Sep 6, 2008, 05:07 PM

I solved the issue by turning down the base idle screw about 1 turn, but still curious if anyone else has had this issue?

[EVO]Cookie · Sep 7, 2008, 08:38 AM

Use the SAS actuator in Evoscan to set the BISS to make sure the screw is set right. If you have more than 2 gallons of gas to a full tank of E85 it will through your trims off until you get a full tank. Then when you get your new injectors you will get to start all over. I would have waited until I had my injectors in and scaled properly and trimmed with gas before I switched over to E85 it keeps the tuning simple.

Speaking about funny looks I don't know how people are in Texas but one of the stations I use a lot I can't get in and out of there without someone at the pumps asking me a half dozen questions about my car and converting cars over to E85.

denver · Sep 7, 2008, 09:30 AM

Thanks for the input. Ill look at that.
Yeah i know I should have just done it all at once, but I was getting impatient and I figure this way, I can play with it run this tank out and start with a fresh tank of e85 when my 1000cc come in.

e85 isnt that popular here yet, there is only a hand full of stations, but I was at a GM dealer and the guys at the service center Im sure thought I was about to be in there getting my take drained :-)

skiracer · Sep 7, 2008, 10:00 AM

I ran E85 with 660cc injectors @ 28psi for about 6 months prior to me getting 1000cc injectors. However, EvoScan said my IDC's were at 125% :P

denver · Sep 9, 2008, 09:22 AM

Im at 98.5% now on 25.5psi....... but I picked up my 1000cc yesterday so this weekend Ill be retuning.....