ECU problem

[chinslip]

I tried to adjust the ignition timing but can't get the ECU in base mode! Yes I tried to jump the little plug above the ECU and still no go! The engine runs very rough when cold but better when warmed up. I'm thinking the ECU is prolly only reading as a fully warmed up engine or something!!! I tried to read the fault codes by jumping the ECU plug but again no go. OH...it's a 93 del sol s...1.5 sohc non VTEC. Does anyone have any clues?

[Geo VP]

I tried to adjust the ignition timing but can't get the ECU in base mode! Yes I tried to jump the little plug above the ECU and still no go! The engine runs very rough when cold but better when warmed up. I'm thinking the ECU is prolly only reading as a fully warmed up engine or something!!! I tried to read the fault codes by jumping the ECU plug but again no go. OH...it's a 93 del sol s...1.5 sohc non VTEC. Does anyone have any clues?

Not a lot of information to go by, but I try giving it a go. It could be a vacuum leak, map sensor going out, IAC problem or out of adjustment (all these can affect cold idle). Also check you air filter, plugs, rotor and wires (when was the last time they were changed?). Even go and check your grounds.

That should give you a start. By the way did you change your timing at all or did it just start before changing anything?

Geo
President
Team Del Sol of Washington