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Forum namePerformance/Engine
Topic subjectWhat is "limp-in" mode in regards to the ECU?
Topic URLhttps://forums.2gnt.com/dcboard.php?az=show_topic&forum=i5&topic_id=60100
60100, What is "limp-in" mode in regards to the ECU?
Posted by tim97rs, Sep-24-03 02:59 PM
First time i heard that term was from my recent dyno outing. they said it was a default fuel/timing map the ECU reverts to if you have to many codes. That it was designed to get you off the road and into the dealer for servicing when to many codes came on to much.

Anybody have anything to say on the topic?
60103, RE: What is
Posted by DarkOne, Sep-24-03 04:07 PM
yeah, it's a myth. The only "limp in" on our cars is on the ATX, when it has an electronic issue - it just stays in second, so it doesn't kill the trans. Trust me, i have like 10 codes right now, if there were a limp mode, i'd be in it.
60108, RE: What is
Posted by Diceman19, Sep-24-03 04:35 PM
i heard the same thing as you but the dino has spoken.
60131, RE: What is
Posted by tim97rs, Sep-24-03 06:27 PM
Dino, your like a nice soft cuddly teddy bear on a bad day. Always there to comfort us and make us feel warm and fuzzy when things are down!!! :+
Thanks!
60176, RE: What is
Posted by HiOnPSI, Sep-25-03 02:10 PM
Um, there is that 4000rpm mode that I was stuck in all summer long because i couldn't figure out what the problem was with my map sensor.


Jon

1997 Eclipse RS

13.887@104.648 5/30/03

www.haiokuracing.com
60186, RE: What is
Posted by DarkOne, Sep-25-03 03:53 PM
Yeah, what do you think is going to happen if the ECU can't determine the amount of air going into the motor? it's gonna lean out, and sputter and pop. That point is around 4000RPM.. it ain't limp mode, its "i don't know what is going on so i can't provide fuel" mode.
60219, RE: What is
Posted by DSMRoadster, Sep-26-03 05:53 AM
I go into limp mode when I had too much to drink.
60237, RE: What is
Posted by Dave_FL, Sep-26-03 12:34 PM
I have lots of CEL codes also. Our cars always get CEL's when we build the engines and run different fuel systems and remove cats and egr's etc etc. Its all a part of going fast. No limp mode in my car at all.
60240, RE: What is
Posted by docta doom, Sep-26-03 12:55 PM
My car feels faster when I don't have the Catalytic Failure CEL cuz of my test pipe, but then again it could be my imagination as I have no #'s to back that up.