[RESOLVED] Is my ECU bad? Help please

[PIMking]

Well my car did something today that scares me. It basically just shuts off. it will idle fine and run fine then all of a sudden when trying to take off it spits sputters and shuts off. The Tach goes nuts and then the radar detector goes trought its beep beep start up faze. both times I just press the clutch in and give it some gas and slip the clutch and its back to normal.

So far no CEL's or anything like that.

 

[robbo185]

open up your ecu and check. Sounds exactly like when my isc part of the ecu died. Here is a pic of what happened to mine.

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[PIMking]

well the ecu was repaired less than a year ago. The guy that did it told me that he had to run a trace wire for one of them. What sucks is I really dont have cash for an eprom.

 

[DSM1G90]

I had to replace mine via Motoguy. Paid $200, plus shipping with the core exchange. Even though when I turned on the key, the CEL light came on and the boost gauge went to 'zero", then CEL light went off after 10 seconds, I was experiencing basically the same until it totally went.

Turned out that my coil and CAS were toast along with the ECU. My car really did the number on the igniton/ electrical area and figured it was just age - 20yrs old, somethings gotta give.

 

[steve]

Check your battery terminals and voltage before ripping into anything.
The check the ECU and post a picture of it.

 

[PIMking]

Steve,

I put a new battery in the car when it did this to me last fall. since then no problems. But when it did it to me last fall I couldn't connect to DSMlink.

 

[steve]

Steve,

I put a new battery in the car when it did this to me last fall. since then no problems. But when it did it to me last fall I couldn't connect to DSMlink.

That's great but that was last fall. What you describing now sounds a lot like your loosing power. Since DSMs don't have a voltage gauge you don't know if the alternator is bad or you have a bad connection.

I could still talk to the ECU with my logger after the car started misfiring under load because the voltage was dropping below 10v. If it drops below about 8v the ECU shuts down.

If that's not it you can move onto the next possibility but check the easy and cheap things first.

 

[PIMking]

That's great but that was last fall. What you describing now sounds a lot like your loosing power. Since DSMs don't have a voltage gauge you don't know if the alternator is bad or you have a bad connection.

I could still talk to the ECU with my logger after the car started misfiring under load because the voltage was dropping below 10v. If it drops below about 8v the ECU shuts down.

If that's not it you can move onto the next possibility but check the easy and cheap things first.

sure thing, I will probably still buy another eprom to be on the safe side but I have to install an LC-1 tomorrow so I will check everything.

 

[steve]

If you really think it's the ECU have somebody try it or send it to me and I'll check it out.

 

[PIMking]

If you really think it's the ECU have somebody try it or send it to me and I'll check it out.

when the guy socketed it for me (he has done numerous ECU's for other DSMers on here) he told me that a trace was bad and replaced the caps and ran a trace wire under the board.

He was close (30 mins away).

I just would like to have one for a spare laying around if you know what I mean.

 

[PIMking]

I think I found the problem.

The batt is not tied down (yes I know I got to get one) but the rubber cap wasn't all the way on and arched on the hood. But thank god I didn't fry the ECU.

 

[steve]

I'm glad it just turned out to be a power problem after all.

 

[DSM1G90]

I had to put new lead cable connectors on the battery leads so I'm rock tight on the battery and no electrical connection problems.

Now you can go up to your thread tools and do the "Resolve" thing...