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85 Fleetwood Brougham
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34 Posts
Discussion Starter · #1 ·
ok when i start my car it runs fine until i get on the high way then it dies .
when i turn on my head lights the car wants to die and then the idle jumps up when i adjust the brightness of the dash lights it starts to die again.

i checked all fuses and replaced the alternator and fuel pump,
i took out my ECU and it looks like it has water damage in it the circuit board is bubbling in side of the ECU case.

i had the ECU tested and the dealer said it was throwing to many codes and it may be bad .

what do you think is it bad ?

what else could it be ?
 

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chevy 350 powered 86 FWB, 00 safari h.t. 66 toro, 83 lesabre
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6,397 Posts
theres an easy way to test the ECU. go to a junkyard and get another 4100 ECU. shouldn't cost you more than $20.
 

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84 Coupe w/500
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5,671 Posts
If you can control your idle with your headlight switch, I would say the computer is a good place to start.
 

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Registered
85 Fleetwood Brougham
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34 Posts
Discussion Starter · #4 ·
ok thanks guys like i said i did notice water damage around the harness that connects to the ECU and on the inside it looked suspect so i went ahead and bought a used ECU on ebay ill keep you posted on what happens .
 
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