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po101 po103 codes engine missing
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timszr2
Novice
Oct 17, 2006, 4:07 PM
Post #1 of 2
(6940 views)
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po101 po103 codes engine missing
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 4.3 1999 s10 replaced plugs wires fuel filter crank sensor coolant temp sensor. 101 is mass air flow will replaceing it stop the missing
99 zr2
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Guest
Anonymous Poster
Mar 26, 2008, 5:19 PM
Post #2 of 2
(6724 views)
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Re: po101 po103 codes engine missing
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I have had the same problem with my S-10. It is a 99' 4.3 vortec, and i replaced may things. The fuel filter, punched out the cat, fuel pump, throttle position sensor, cap, rotor, plugs and wires. Still it was cutting out and would die going down the road. I took it to a garage and got the P0101 code. So then I pulled my mass air flow sensor off and saw that there was build up on the transistors. I took it inside and cleaned the transistors with rubbing alcohol. Let it dry, then put it back in and it has made a 100% improvement. The Service Engine Soon light was on for awhile after, but then went out on its own. This may be your solution unless transistor are damaged or broken
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