Technical Coupe 16vt rev issue

[vern]

The chip in the ecu...

http://i16.photobucket.com/albums/b23/vern2/8d31e730.jpg

Thought id unclip the harness from the ECU and refit to make sure it was fitted correctly/tightly, started the car up and good news it Rev'd to 7k so yes i thought my fault was fixed.

As i let the car tick over i jumped back and rev'd it again only for the 4-5k missfire to have returned......

I undid the ECU harness again and left it then refitted and started the car once more, the fault had gone and i Rev'd to 7k nicely.

This is the only the way the fault disapears ie uncliping the ECU harness and plugging it back in momentarliy it goes.

Any ideas as to why this happens? ECU at fault poss?

Would a dodgey Lambda sensor do this?

 

[Ziggy122]

Not a basic Phlonic wheel learn is it? that also self tests?

Ziggy

 

[BravaNorway]

Hi

You can try this out:
disconnect the battery and leave it for 20 minutes.
Reconnect the battery
Start the car WITHOUT TOUCHING THE ACCELLERATOR
Leave it running on idle, still without touching the accellerator or anything else. The Idle can go up and down a lot while the ecu is recalculating parameters etc. Leave it running until the radiator fan has been running and stopping two times. Stop the car.

This is what to do on a -90's FIRE engine when it starts acting strange with no apparent reason, so given this is a Fiat and they tend to use similar setups, it just might work on yours? Worth a try, anyway...