ECU programmable?

[bgd73]

I inadvertantly burnt a resistor and replaced it with one from radio shack on my ECU (resistor R1). There is no pings now, and from cold to warm is better and responsive. Is there a way to tinker with the curve of stuff without changing resistors on a 93 loyale?

[idosubaru]

you disassembled the ECU down to the board and soldered in the burnt out resistor? that's pretty sweet, nice job.

 

messing with the ECU is not profitable, it's been discussed a number of times. the amount of $ and effort would be better spent towards a stand alone like MS. unless you're highly efficient with computer hard ware and software.

 

how did you burn it out?

i recall this last week and you picking up another ECU, but don't remember what you did to burn it out.

[bgd73]

I went to junk yard after they told me they had a 93 loyale ecu. I show up, it is diff part numbers and for an 88 GL. So I drove home on the Zalman resistor (and then some) to take a guess at what would be good. I was impressed by no pings the zalman gave me, and also proved my hunch about this 2wd taking off too fast for the ECU and gadgets to loop around for the throttle curve.Only problem with the zalman 56ohm was the cold starts were bad. So, Radio Shack had a 10 ohm, 1 watt gold tolerance resistor. I wanted 5 ohm or less at 1 watt or greater, but that is as close as they had for 99 cents.

 

As it turned out, it was very good. No pings and ran great when cold too (unlike the zalman). Upon smelling the computer circuits after first run and knowing how slow the layers change from building pc's, I parked the whole front end of the car at the end of a boat ramp in the river to help it along to the new settings.

 

So Far it is excellent, no errors and improved ... got lucky on a hunch and saved some dough in the process. If it was a 4x4 I would have sought the faster responding oem ECU.All I did was slow and filter more...

funny thought is even these 2wds manual trannys brand new pinged for many years blaming the gas on a 9.5:1 engine (another reason I went with my intuition to hack at it a bit)There should have been no pings on this compression and proper air/fuel for the throttle.I got lucky with the resistor swap.I even went to the local notorious for bad gas station and all i got was hesitation , no pings.I did many other things to stop pinging such as letting air in to engine more, but this fix was the grand finale (in a very good way)