56k warning! burnt ecu, is this normal?

[nyne]

Here's my ECU, i was wondering what the hell happened my car was parked in my shop (window tint shop) here in Las Vegas, my boss went to start my car, heard a big POP from around the dash area... i pulled the ecu out today, and it smells terrible.. a garbage, fishy smell... anyway. this is what it turned out to look like on the inside...

I'm guessing I should just buy a new one huh.. (if anyone has one out there that will work w/ a 90 GS-Turbo, let me know [email protected], it's my only form of transportation for the time being .

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[Blitzed95Eclips]

no thats not normal

 

[Bohrn]

man, I was going to say, replace the caps, and call it good, but that thing is shot I'd say...

Find yourself an eprom unit

 

[tehehodi]

nyne,your not the only one with that problem,my car has done that twice to me, I just happend to me again this morning, i got a new ecu,put it in..and pop,there she goes AGAIN,i don't know what it is, and its the exact same spot as yours and exact same spot for the second time.there goes $250 down the drain. I was wondering if any could solve this problem. I have a 92' Talon TSi.

 

[Thunderskull]

The chip that burnt is the one that controls your ISC. If your ISC is bad, that may be why you've gone through 2 ECUs. Also, if your caps go and that chip is affected, then you might want to check your ISC for damage to make sure you don't blow another ECU.

I hope this helps.

 

[nyne]

so you think this ecu burning up is related to the ISC rather than the capacitors? I have had problems with idle surge, and the car damn near dying when i turn on the AC, Heat, Headlights, radio, etc. Could that stuff be ISC related? (battery is new, and altenator seems to be doing its' job)

 

[Bohrn]

yep, the isc is what controlls the idle under extra loads such as the a/c, power steering, lights etc.

and if the ecu isc chip is done in, then its not going to be able to control the idle.

 

[nyne]

well, the car won't start period now that the ECU is fried.. i just recently got a new one in the mail (not new, but working anyway) should i check my ISC before i actually install this ECU?

 

[Bohrn]

yea, that would be a good idea.

 

[Thunderskull]

Originally posted by nyne
well, the car won't start period now that the ECU is fried.. i just recently got a new one in the mail (not new, but working anyway) should i check my ISC before i actually install this ECU?

Yes, you should check your ISC before installing the new ECU. When the caps go it can affect the car's idle. I've had leaking capacitors kill an ECU and affect the idle. But, that chip is burnt to a crisp. It's possible that your ISC was bad which was resulting in all of your idle problems. At the same time that ISC was damaging your ECU. Finally, your ISC probably went and took the ECU with it. The same thing happened to me after I replaced my ECU that had leaking caps. The ISC burnt that exact chip right to a crisp. I replaced the ISC about 5000 miles ago along with the ECU (ECU #4), and I've had no problems since.

 

[nyne]

that's what im going to do tomorrow morning then, before i do anything, if it is messed up, I'm just going to have to replace the ISC before i even try putting the ECU back in.. or connecting it to the harness anyway, do you happen to have a working 90 gst ISC around just in case?

 

[Knoob]

WoW amazing , thats insane.

 

[Thunderskull]

Not one that works. Try going on dsmtrader.com or look around on ebay. I got a whole throttle body with the ISC and sensor for like $30 off ebay. You can get a rebuilt ISC from crebotech.com for $89 plus shipping. I think they charge a $15.00 core on top of that too. It's cheaper than the $200-$250 that Satan will charge you for it. Plus, they have a warranty too.

 

[nyne]

crebotech doesn't do ISC's for 90 model's.. just 91-99.. just got an email back from there.. blah

 

[tehehodi]

could it be anything else besides the ISC?

 

[nyne]

i don't know for sure, i wish there was a decent shop out here, im pretty much relying on the stuff i find online, the forums, IRC chat, and a haynes manual.. dsm.org definatly rocks for info too.. but man, i dont want to roast another one.

 

[Thunderskull]

Originally posted by nyne
crebotech doesn't do ISC's for 90 model's.. just 91-99.. just got an email back from there.. blah

I wonder what's different between the ISC for a 90 and a 91? Did they mention it? It doesn't say anything about it in the service manual.

 

[nyne]

i have no clue really, they didn't indicate any changes in the haynes manual *shrugs*

 

[nyne]

well, damn it.. it happened AGAIN, this time it is burned somewhere else. i bought another ecu off of dsmtrader for 101.00$ (shipped) and even opened it up and looked at it before hand.. it had been opened recently and 'cleaned' apparantly.. (not original case screws, etc) anyway, this is what happened after driving once, (with the ISC connector unplugged, since the ISC motor came out bad... anyway.. here it is.. is this what a leaky capacitor should look like? is this salvagable, or am i stuck buying ANOTHER one, that is already broken ?

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[Thunderskull]

Yep, that capacitor leaked. If the guy cleaned it, he probably cleaned off the acid from his previously leaking capacitors. There's no other reason I can think of why you'd have to clean off an ECU. It's not like gunk can get in there since it's sealed up so well. It sounds like you got gipped either intentionally or unintentionally. You may be able to get away with replacing the capacitors and cleaning up the board if that acid didn't eat up anything on the board. Try cleaning it off with some alcohol and see if that gunk comes off. Also, check that riser card right next to the acid spill. It may have actually burned something out on it. Personally, I'd try to get my money back.

 

[nyne]

what a pain in the ass. ugggh the car wouldn't even start, i pulled the ecu and that's what i found... real nice. Most likely have to get another one... ah well i'll try to clean it up

 

[AWD2Liter]

Those look like the original capacitors. You'll have to replace the caps since they leaked, don't just clean it up. Hopefully the surrounding surface mount caps weren't affected, traces weren't damaged, and the daughterboard is intact.

 

[tehehodi]

I took out my ISC today and it was completely burnt. Smelled just like the ECU too. It's horrible and I checked it and it was way above 33 ohms. Is t here suppose to be some oil in it when you take it out?

 

[tehehodi]

My car idles funny again..maybe its cause my ecu is still burnt?but it worked fine till my car got hot?

 

[nyne]

open up your ECU and take a look at it, you may be able to get away with just replacing your capacitors, and cleaning up the burnt portion of the board, but then again ya never know till you look. take and post pics of the burnt ISC and ECU im interested.