Question about 1986 Chevrolet Chevy
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Posted on Jan 02, 2017
This is a major prob!! Sometimes it is best to remove the pipe and take it to a shop and have a new thread piece welded in! I have seen where you do manage to turn it, but the threads get stripped anyway. This should be changed once a year for top performance and do not tighten the new one in with great force. OK Frankster016
Posted on Oct 23, 2008
SOURCE: O2 sensor problem
I have a 97 gmc sierra .This truck is the same as the chevy ok.Its a 350 5.7 liter 4x4 Z71.I took it to auto zone which was my first mistake.They put it the scanner and said bad O2 sensor.Ok so which one is it i said.They dont know.Well there four (4) O2 sensors in this truck i hope you know that.I had to replace all four of them before i had to take it to a real shop.It seems the fuel pump i replaced a week earlier with an auto zone fuel pump was bad.Ive changed my feul pump 4 times now and have 235000 miles on still running.You need to get your fuel pressure checked.It should be 65 psi to start it and 55 psi to run it.If the pressures are good it could be a different O2 sensor or maybe the mass air flow senor.My last option would be the fuel pressure regulator because it seems to be a waste of time and money.I would get that fuel pressue checked first.Good luck.
Posted on Nov 25, 2008
On the front O2 Sensor, the signal wire s Purple. On the rear O2 Sensor, the signal wire is Purple and White. (You will probably have to look at the wire colors on the main harness side of the O2 Sensor connector, not on the sensor itself.)
Posted on Nov 19, 2009
SOURCE: diagram of the location of
Downstream sensor is screwed into exhaust pipe after the catalytic converter on most models. Depending on your exhaust configuration, your code will say bank 1 or bank 2 or no bank designation. Some have converters coming off each cylinder bank (exhaust manifold off cylinder head) if only 1 converter in system (no bank) there will only be the one O2 sensor downstream.
Posted on Jun 20, 2011
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