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Question: ..85 c4 l98 can the 'limp home mode' be disabled.?
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1. ...What is the most common l98 operations failure to send it to 'limp home mode'.?
2. ...Can I reset ECM to run fuel only.?
See the current results of this survey
Click one of the following choices to submit your response. (NOTE: Be sure to select the correct response, once you make your selection you can not change it!)
1. ...What is the most common l98 operations failure to send it to 'limp home mode'.?
2. ...Can I reset ECM to run fuel only.?
See the current results of this survey
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
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Short answer...No. More info on your particular issue would help.
Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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Send PMNORTON, OH - USA
Joined: 7/9/2012
Posts: 111
Vette(s): 1985 C4 red,
1985 C4 Black and dark gray
I never knew there was such a thing as limp home mode ? The only time any of my C-4s had been on a trailer was the first time they came home with me, I never bought one that ran LOL thats just me
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...RV85...hi...sounds like like we fell from the same tree..I landed on my head...paid $1000,,,drove it home ...it ran pretty good this 85 c4 l98 numbers match / doug nash 4/3...190,000 mi.don't know how many owners...bare wires under dash..AC disconnected..wiper motor in a box...head lites don't budge...this is my first computer vette...the ecm is fed by many sensors...if any of them fail the computer/ecm shuts the fuel down thinking that further travel will cause serious damage...this c4 starts fine..throttle it and the ecm shuts the motor down....hits on all 8...it may idle fine for quite awhile...but under load the ecm takes over and you're not going any where.....'Limp Home Mode'.......I guess I was hoping to disable this function.....thanks for any help...not to ruin your day but all of your C4's have this.. j.
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Posts: 690
Vette(s): Black 1979 L-82
Black 1996 LT1
Black 1999 Coupe
with all the electrical problems you just listed, may as well start with a complete rewire and wire trace.
And that will cost you........
GL
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Lamar is testing all the forums. He's received plenty of answers!!
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w
fairly unlikely, as the ECU enters emergency procedures eg if a sensor failure occurs. if the ECU wouldnt, for instance, use "best guess" data if the ox sensor fails, the car wouldnt run at all.
do you have a specific problem?
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Wolfuser had so far the most accurate response. There is NO "Limp Mode" for the engine control. The only sensors that can keep it from running if they fail normally are the Mass Air Flow and the Crank Position Sensor.
You need to first check for codes. If this reveals no clue, manually check to see what your losing when it stops running, IE check for spark then fuel pressure.
The only limp modes on ANY GM vehicles (and Chrysler too BTW) is in the transmission control. If something fails that causes this feature to engage usually youll only have reverse and second gear to use.
ASE Master Certified, L1 Certified, Owner/Tech
Track Day Rat
80 4Speed
96 LT4
If you're never out of control you're not driving fast enough
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in Forum: C4 General Discussion
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