1G 1g clicking behind dash, then dies

[iBoostDSM]

The car starts up perfectly then the motor loses power. Sometimes it's 2 senconds after starting sometimes it's closer to 10 seconds. It seems to have progressively got worse. The first time I noticed it was while driving the motor would just stall. Did that about 4 times then it hasn't been able to make it out of the driveway without stalling. It all started to happen after installing a boost gauge by the way.

So I read up on this before I decided to post but now I'm stumped. At first I thought it was the ecu. I replaced the caps and upon doing it I found that one of them was actually blown. Just a little bit not enough to leak. Replacing the caps did not help. So I also replaced the MPI relay, same thing, didn't help. I can still here the clicking coming from behind the center console. What else would be causing this?

 

[cliffkemp]

May sound funny but, check your battery connections...even a little corrosion can cause all kinds of junk. If you have any gauges in the car, watch them and see if it is leaning out or richening. Another possibility is the coolant sensor. Check the usual stuff like fuses and relays as well. Make sure all of them are good and connected well.

 

[bryanwheat]

I'd be willing to bet that there is a damaged trace on the board or you didn't get the cap soldered in good enough. That is the exact symptom of an ecu with a bad cap.

 

[tsi209]

Yup like stated look at your ecu

 

[iBoostDSM]

Okay, I know someone with a ecu that I can try. Hopefully it's not that since I already have an eprom

So I tried out the new ecu that is from a galant and here's what happened.

At first it took a couple cranks to get it started, but once it started it had a perfect idle right at 750rpms better than my ecu. But here it is, when I pressed on the gas the rpms would drop so I'd let off the pedal and they'd rise back to 750. If I slowly pressed on the pedal it would rev up normally. Then after about a minute the cel came on. Then I shut it off. Is there something different about the galant ecu?

 

[bryanwheat]

Was it a vr4 ecu or just a n/t galant?

 

[92AWDHX40]

I had that problem on my fwd ecu was shot, had to replace it.

 

[LandoAWD]

Is there something different about the galant ecu?

It's for a Galant.

 

[iBoostDSM]

Was it a vr4 ecu or just a n/t galant?

It's from a vr4.

It's for a Galant.

Would it make a difference though? The plugs are the same?

 

[LandoAWD]

It's from a vr4.

Are you 6bolt swapped?

 

[Kapok6]

I'd be willing to bet that there is a damaged trace on the board or you didn't get the cap soldered in good enough. That is the exact symptom of an ecu with a bad cap.

I would second this.

Swap in a known working ECU and see if that changes anything.

I botched a socketing job on an ECU once...car did the same exact thing.

 

[iBoostDSM]

Are you 6bolt swapped?

It for a 92 talon tsi, and it has a 6 bolt.

I'm also in the process of looking for another ecu to try.

Is there something about the vr4 ecu that would make it not work on a talon. This is a known working ecu too.

 

[LandoAWD]

http://www.dsmtuners.com/forums/newbie-forum/180775-does-galant-vr4-ecu-work-1g.html

 

[iBoostDSM]

Found out it was the ECU. Swapped it out with a buddies ecu from a 93 tsi and it works perfectly.