My freind here has a 92 Galant DOHC. It has some idle issues. Unfortunately my crates full of galant stuff are back home. I however did bring my logger.
When the car is turned on the idle goes to about 2500 then sinks to an oscillation from 1,200 to about 2000. Sounds like the ecu but please read the following.
1, all connections in the engine bay are good.
2, idle switch functioning and set correctly
3, TPS set using the logger correctly
4, CAS is good
The ECU was capped by me about 9 moths ago and there was no damage on the board.
ECU communicates with the logger. There are sensible redings coming out of all sensors except the ISC. That is flatlined at 0 on the logger. But MMCD shows no error codes in the ECU memory.
I tried a Hyundai ecu I brought over from the UK, that runs, but again the car suffers from a high idle. ISC readings fluctuate on theat one. The servo is good, but here's where the questions start to formulate in my head. It looks a little different than I'm used to seeing a rim around the outer face, this is a smaller thing. Masuring the depth of the bore vs the height of the servo with a vernier looks to be ok. PN MD628051 Is that OK? It's not listed in the Jap parts book I have here.
I popped the ecu apart and traced and belled out the traces back to the ISC drivers and these are all good (all4)(def no cap damage) so I'm a little stuck. This is for both ECU's
One last thing. No knock sensor. No lambda sensor, only basic emissions kit as std equipment here.
Can anyone help with some ideas?