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#1
09-25-2004, 09:35 PM
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open loop operation
Still trying to figure my old truck out, but I did run across something. I was checking it with a snap on scanner, when started up it ran open loop until about 125 degreesthen went closed , but while at operating temp (185-190) it switched back to open loop. I was told by another mechanic he did not think that it was supposed to do that. Anyone know what loop it should be in and if it is wrong what would cause it? No codes are present, 88 1/2 ton 2wd 350 tbi. Thanks for any help!!
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#2
09-26-2004, 01:37 PM
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Re: open loop operation
what ran open loop?
__________________
Matthew Brough  1997 Geo Prizm -- 301,000 miles 2000 Honda Accord -- 225,000 miles 2004 GMC Yukon XL -- 223,000 miles 1987 Jeep Comanche -- 116,000 miles 
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