do i need to reset my ecu
09-02-2012, 07:23 PM
#1
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Location: butternut wi
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Year: 1995
Model: Cherokee
Engine: 4.0
do i need to reset my ecu
i had a cracked manifold so i replaced it with a new one and through in a new o2 sensor while i was at it, after doing this should i reset my ecu or should it be close enough to self correct the new air/fuel mixture the the non leaking manifold
09-02-2012, 07:44 PM
#3
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
I gather that it will just continue to learn as you suggest. I guess if it was running really bad, you'd leave the battery disconnected overnight to reset to default's.
I'm no expert! Just been following the forum for awhile. Btw, ECU till 90, then PCM 91 on.
I'm no expert! Just been following the forum for awhile. Btw, ECU till 90, then PCM 91 on.
09-02-2012, 08:31 PM
#4
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Year: 1995
Model: Cherokee
Engine: 4.0
thanks for the info and also does anyone know how rich it will run if i reset it, i dont want to ruin the millage i have now waiting for it to re learn the new fuel map
09-02-2012, 10:27 PM
#5
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Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
Just drive it, the PCM will adjust instantly. Actually, up until 96 Chrysler called the engine computer an SBEC. It stands for Single Board Engine Controller.
Last edited by Bustedback; 09-02-2012 at 10:30 PM.
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