-service engine light comes on (p1oo maf or vaf circuit malfunction). i replaced the maf and cleared cleared the code, started it up and drove it and it still came on!
- next in the fuse block in the engine bay the engine sensor fuse was blown i replaced the fuse, cleared the computer drove the car and everything seemed alright for 2 miles then the same code came up! and the fuse was blown again!
- so next people told me to trace the scematics for that fuse i probably have a bad ground, well that fuse goes to all 4 o2 sensors, i had a tune down wich they eliminated the back o2 sensors and the fronts i have long tube headers with my homade o2 extensions. well i thought that my extensions was my problem so i ordered 2 new extensions and 2 new o2 sensors. put a new fuse in cleared the computer drove the car, and guess what same code came up and blew the fuse again!!!!!!!!!!!!!!!!!!!!!!!!!!!!! please help!!!!!!!!!

 

anybody ?

 

Did your try and trace all of your O2 wires. Could there be a chance that some where in the wiring that a few wires were to close to the headers and melted together? I would try and probe all the wires for resistace to make sure you dont have a short.

 

thankyou i'll look into it!

 

It probably has one of the heaters shorted in the front o2s

 

were are the heaters? in the o2 sensor itself?

 

yeah the heaters are built in... trace all of the wires down and you'll find it... allways check wire BEFORE replacing sensors

 

i already replaced the front o2 sensors and still blows the fuse. i didnt check the wires first, i got in a hurry so the heater is before the o2 sensor then?

 

No the heaters are in the o2s. Check the wiring for the 02 on the passenger side especially down by the starter where it break out of the harness by the dipstick.