What is Limp Mode?

[rancheroo]

What is it & how can you tell if you're in it. The term seems to be tossed around for Rangers that run poorly.

Rick

 

[Fast Fords]

depending on the severity of the situation, you could loose alot of power to your engine (your injector will actually shut down). I was driving a brand new expidition once and it went into "limp mode" and wouldn't move at all..this was because the tranny went wonky, but ya. If your vehicle goes into limp mode, its usually pretty bad.

 

[Jason]

It is a safety feature that prevents unwanted operation. I have often encountered it when I have drank a great deal of whiskey and no longer have good judgment in womens' attractiveness.

 

[Earl43P]

From: http://www.fordfuelinjection.com/index.php?p=64

Failure Mode
Failure mode is a stand in strategy in the EEC designed to maintain vehicle operation should one or more sensor inputs fail. When a sensor input is perceived to be out-of-limits by the EEC, memorized data from the computers KAM memory will be initiated. EEC continually checks the sensors against its records of normal readings during operating conditions similar to its current state. Hold on that sounds hard! Not really, randomly EEC looks at the past to see if the engine is somewhat where it usually is. If for some unknown reason a sensor is off the charts, it can’t be trusted. So instead of tuning the engine to a possible faulty sensor reading and harming the engine and drive-ability; EEC replaces the sensor reading with a best guess from a past memory. This is why unplugging the battery to fix something works against you. Unplug the battery causes EEC to memorize all the sensor data as base line and normal. If it memorizes a bad sensor it will take it longer to call it a liar. Ford did however give EEC a very broad idea of what the sensor should be reading in its permanent ROM memory, so it will catch on to failed equipment sooner.

 

[rancheroo]

Thanks very mych fellas. Earl...Great web site...Used to pass through E-city on the way home from the OBX.

Rick

 

[skyy_4life]

off topic. were at obx? i stayed there for 1.5 weeks with my girlfriend in hateras islands in july. place called Avon. ssen some hella 4X4 rangers there. and 2x toyota supras.

 

[myold96]

limp mode

my friends would go out drinking all night long and their significant others would complain the guys had that problem from to much booze and they didn't remember it the next day but boy was the old lady pissed.

 

[myold96]

i have heard of limp mode but the doctors gave him pills and now everything is good

 

[Mark_88]

I just discovered that gabapentin, the pain medication that I've been taking, causes, ahem, erectile dysfunction...aka limp mode...

I'm going to cut back on this drug...there must be something that kills pain and enhances erectile function...I think her name is Rhonda Rousey...no, wait, she causes pain and can crush your erectile motives in a single flip and pin...