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#1
03-10-2005, 06:05 AM
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Runs on 3 cylinders when cold
I have a 95 S-10. A couple days ago I started it up in the morning, runs on 3 cylinders. Get on the road, after about 10 minutes it starts running normal, misfires here and there. Same thing next day. The only thing I had done was the oil changed the day before this started happening. Checked for loose s/p wires, they seem ok. Fouled plugs? Any ideas?
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#2
03-10-2005, 09:20 AM
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Re: Runs on 3 cylinders when cold
Could be bad plugs, bad CPI unit, bad wires, bad cap and or rotor..
__________________
  95 s10 Blazer, EGR Mod, ZQ8 Steering box mod, 99 Center console shifter mod and more... See everything at www.pghconsulting.net/teal
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#3
03-10-2005, 12:08 PM
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When my head gasket went and my head was cracked my truck ran on 3 out of the 4 cylinders, but it was definitely not as long as 10 minues, probably about 30 seconds. If my oil pressure guage is correct, everytime I change my oil the pressure is a bit higher for a few days (no, it doesn't leak), so maybe yours is the same way and your boost in oil pressure caused something to fail. Just a guess.
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#4
03-10-2005, 06:41 PM
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Re: Runs on 3 cylinders when cold
Check to see if you may have knocked any wires off of any sensors or maybe a vaccum line. start off simple. any codes??
__________________
1985 V8 S10 1974 NOMEGA (Chevy-Olds hybrid 1/2 nova 1/2 omega)
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#5
03-15-2005, 03:53 PM
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Re: Runs on 3 cylinders when cold
I beleive the 95's were HEI weren't they?
I had a similar problem, ended up being the of the coil packs starting to fail.
__________________
1996 Chevy S-10 STD bed, STD Cab / 2.2 4cyl Stock 5 spd. 123k "Ultra-Lux" Manual window / door lock actuators. Sony CDX-M9900 Head / Sony XM-2150GSX Kicker 03CVR10 10"x2 Boxes, built by hand / Dash speakers.. well.. "Chevy craft" paper kickers. The master cylinder *was* dying. It wasn't normal. So pffft. :-)~ As always, thanks for the advice though.
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