I thought I had my tune nailed down. But every once in a while I get a SES light. It usually happens before the engine is warmed up. I finally got a datalog of the error. In the attached file, the ses light comes on at 3:40. PE mode turns on just before. TPS is only at 22 so PE shouldn't have come on. Also uploaded is my current bin.

Thanks.

 

OK, what malfunction code is being set???????

RBob.

 

42

 

Good 'ole code 42. Could be from a slew of different items. Basically the malfunction is caused by a miscount of outgoing EST pulses (from ECM) and incoming DRPs (from distributor).

The condition of the distributor is paramount, then the wiring between the coil and distributor, and the wiring between the ECM and distributor. Then of course the ECM itself.

RBob.

 

Wiring looks fine. It did it again today. At 2:33 and 5:39 on attached csv. It's like the engine shuts down for a split second.

 

lol I'm sure they look fine... but did you ohm them?

- Rob

 

the pick up coil has caused me to chase my tail twice over the years with tpi cars. I now change then when I have a dizzy out if the look really old