How can I tell if my ECU is shot? - Page 3 - JeepForum.com
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post #31 of 37 Old 03-31-2010, 05:27 PM
jeepinmichguy_
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2003 TJ Wrangler 
 
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just look for the hole


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Jeepinmichguy is a jerk.
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How about this, if you had the Jeep Spirit, you wouldn't abuse the rest of us trying to enjoy a nice day out wheeling by bringing your brokeass broken down junkyard crap out to play where it can't handle it?
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you all have nice rigs, stop being f****** a**holes.
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post #32 of 37 Old 03-31-2010, 05:30 PM
msprooch
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Your voltages aren't that bad but remember that a high current could be present with that low voltage.

OHM's law ---> V = I R

Therefore if the resistance is very low and the voltage is low then the current could still be high.
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post #33 of 37 Old 03-31-2010, 07:56 PM Thread Starter
lexinator02
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1995 YJ Wrangler 
 
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well instead of fusible link wire all I could find was inline fuses with 12 gauge wire so I installed these in place of the fusible links... 4 total I beleive with 30 blade fuses in each. I know this was the wrong way to do it but I couldnt risk blowing my new ECU. Do you think 30's are too high? Could this be making false readings in the PCM for the sensors? All I know is that before the issues arose it idled fine. It was like pegged at 3,500 once the engine warmed up and nothing except pressing the gas pedal or opening the throttle. I think its electrical bc that would be a giant intake leak to idle that high.

When I installed the ECU, I disconnected the negative battery terminal. That was it. Should I reset it again or what should I do? I need to drive my car home from work tomorrow so I need to get this sorted out.

Thanks in advance guys!
Dave

Low Output 4 Cylinder Jeep Club Member # 187
1995 YJ
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post #34 of 37 Old 04-01-2010, 11:22 AM
Que89YJ
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1989 YJ Wrangler 
 
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Did you have any luck. It sure sounds like a vacuum leak
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post #35 of 37 Old 04-01-2010, 12:11 PM
Que89YJ
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1989 YJ Wrangler 
 
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I'm not sure of the values of the fuseable links without a schematic so I cant help you with that right now. It is important to have the correct value though. No, it will not effect the PCM readings so the idle issue doesnt have anything to do with the fuses. The bad news is that because of the way that ECU cooked you could have and probably did take out one or more of your sensors. I would bet that since your high idle from the start that the engine temp or TPS is bad.
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post #36 of 37 Old 04-01-2010, 07:04 PM Thread Starter
lexinator02
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How can I test these sensors? I know the TPS is on the throttle body but where is the start sensor?

Low Output 4 Cylinder Jeep Club Member # 187
1995 YJ
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post #37 of 37 Old 04-11-2010, 02:15 PM
JOExFROMxNY
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1988 YJ Wrangler 
 
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Location: Long Island, NY
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how did this turn out?
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