hello,i've just chipped an p28 and when i put the jumper it doesn't take the map and the check engine light stays on,other strange thing is when i take out the jumper to run the stock map,when i put the ignition on the check engine does a quick blink,not like it should do with a stock ecu.i've tried with other chipped ecu and it works.

 

What chip are you using and are you sure of the quality of the socket/solder work?

 

the chip itself works on the other ecu,i've desoldered and solder it again,still the same problem.the single clue is that quick flashing check engine light when i put the ignition with the jumper off.with the jumper on it runs in safe mode and the check engine doesn't go off

 

Are you 100% certian the ecu worked properly prior to the socket install?

 

yes it did...not having a clue about what it might have..

 

What are you using for tuning software and hardware? Do you have any hardware to connect the chipped ECU to a laptop?

Have you tried checking for diagnostic codes on the ECU both with and without the jumper?

 

The ECU is most likely toast. About 10+ years ago during my first socket install / VTEC conversion I screwed up and ruined my ECU. It was doing exactly what you say yours is. Some people say there is no way it could of happened but I learned my lesson and moved on - and I never let it happened again.