no-start '93 960

Check for codes & post back

Did you reset the codes after the O² fix? Recheck the codes fix any indicated faults then reset the codes to 1-1-1 for all code indications.

Make sure that the coils were replaced on the proper plugs and that the coil harness isn't pinched anywhere.

Bob

Before and after replacing the O2 sensor, the following faults codes would be captured with just a few minutes of driving: 231 (long-term fuel trim, part load) 511 (long-term idle air trim) 512 (short-term fuel trim). I've been fussing with these codes for many weeks and miles. The engine has been running a little rich so I suspected faulty O2 sensor. The new one did not affect the problem. Then I suspected an air leak and fixed one of those. It idled a tad smoother. Still the fault codes would keep appearing. This past attempt, the codes were cleared, plugs inspected (newish 4 prong Bosch platinums) and the compression checked (roughly even 160 lbs). It was at this point the engine would barely idle for a few seconds and has since ceased to fire. I have voltage on all six coils. All are in their correct places. I see spark on #1 and smell gas in #1. I hear the fuel pump when turning the key to the run position. I've tried resetting the fuel trims to the default by disconnecting the battery for 10 minutes. That did not help either. I hate to jump to the conclusion that the ECM or MAF sensor is damaged. I was hoping someone would recognize these symptoms and point me toward the guilty component.

Thanks, Ric

"Glenn Klein" wrote in message news: snipped-for-privacy@hotmail.net...