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Old 10-12-2014, 08:28 PM   #16
gec
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not sure if it's relevant but i had the same problem with a 4.3 chev, changed every sensor & o2 & It would surge, turned out to be the coolant temp sensor was sending the wrong message to the computer when it heated up. 20.00 fix after spending 200.00+ on stuff it did not need.
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Old 11-14-2014, 02:22 AM   #17
South
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wasn't Crank position sensor....
going to try coolant temp sensor, air temp sensor (one in manifold).
Maybe its my chip for m50 intake, 91 fuel and 7000 rpm? I guess I could eliminate this possibility by driving with stock chip again...just been too busy with another e36
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Old 11-14-2014, 11:02 AM   #18
cirrusblau
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You're just throwing money away. Do some diagnostic work and you'll spend a fraction of the time and money.
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Old 11-14-2014, 11:39 AM   #19
BmW1819
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It's not chip I've got down to temp sensor or air mass
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