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What the HELL is this about?

posted by  surfindude on  Tue May 3 15:54 CST 2005
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last visit: Wed Jul 2 02:00 CST 2008
[RELATED]

My 93 960 won't start. Valve timing is correct. Tried WOT cranking for a few minutes (30 sec max at once)to no effect. It's on the verge of running but just won't start. Fuel pressure 43#. Tried resoldered fuel relays no effect plenty of fuel pressure so no problem. I checked for spark, seems somewhat erratic to me and tach occasionally drops to 0 while cranking. THEN IT STARTED AND RAN WITHOUT 1 SPARK PLUG in # 2 or 3 or 4 (I was checking for spark with a old plug, removed 1 from engine and tried, don't ask me why I did this I don't know, didn't check all didn't seem necessary) although compression was blasting out - this is a coil on plug motor so NO sp wires. What the hell why won't it start with all plugs in (recently replaced bosch platinums). The flame trap was clogged replaced it. Changed cam sensor no effect crank sensor 304 ohms -in spec. Added plenty of gas to tank, tried dousing card cleaner into TB no effect. No other codes, wiring seems intact cleanned groud under manifold, engine wiring seems to be in good shape - no burns - cracking. I'm thinking power stages or ECM now. Any comments / suggestions?






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