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Old 05-10-2017, 01:00 PM   #17 (permalink)
OleF150
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Join Date: Jan 2016
Location: Virginia
Posts: 1

Shop truck - '95 Ford F-150 XLT 2WD
90 day: 18.14 mpg (US)

Sand Wagon - '07 Ford Expedition 4x4 Limited

Beater Bucket - '02 Saturn SL1 Base, SOHC, 5spd

Beater Bucket - '02 Saturn SL1 Base, SOHC, 5spd
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I can almost guarantee that the ECTS sensor has gone wonky. There is a 1 wire sender for your temp gauge on the dash, but the 2 wire sensor is for the Ecm. The sensor in my 2002 sl1 crapped out and i experienced the almost the same issuse yiure having. Did okay when it was first started, but after about 15-20 minutes of driving, it ran like crap, and F/E suffered greatly.
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