Exposed wiring, what to do?

[Z.m4v]

The problem
having lots of fuel issues and throttle hesitation, looked under the hood and the front 02 wiring harness has rubbed to bare wire touching the exhaust manifold where it meets the fuel rail, how to go about this?

 

[phydeaux33]

Follow the wires back to spot away from block and splice in new, put new GM weather pack connector on end install new O2 sensor and go on. By the pic I see you're pre "97" what year?

 

[mewz99]

Make sure your new O2 heater and ground wires are appropriately sized. Based on the 1990 FSM (I believe it should be the same wire gauges for all years, but colors may differ) the heater is 14ga yellow, ground is 14ga black and the sensor wire is 18ga green.

 

[Z.m4v]

Follow the wires back to spot away from block and splice in new, put new GM weather pack connector on end install new O2 sensor and go on. By the pic I see you're pre "97" what year?

It's a 1996 country. Very late production, 10/96 which is weird to me because it is still the old body style. Also a factory 2wd so the whole thing is strange. It seems like a hybrid between the 96 body and some but not all 97 electronic stuff. I know this is a transition year and super late 96 so I'm guessing the changes were implemented over time

 

[Z.m4v]

It's a 1996 country. Very late production, 10/96 which is weird to me because it is still the old body style. Also a factory 2wd so the whole thing is strange. It seems like a hybrid between the 96 body and some but not all 97 electronic stuff. I know this is a transition year and super late 96 so I'm guessing the changes were implemented over time

Was bought by my dad used in 2000 and he always had trouble with electronic stuff, sometimes he'd have to opt for 1997 stuff, other times 96

 

[Z.m4v]

Make sure your new O2 heater and ground wires are appropriately sized. Based on the 1990 FSM (I believe it should be the same wire gauges for all years, but colors may differ) the heater is 14ga yellow, ground is 14ga black and the sensor wire is 18ga green.

Could it be possible that the heater wire is bad, causing it to run so bad until it's up to temp?

 

[lawsoncl]

Yes, if the O2 heater or the wires are damaged it will run poorly. I don't recall which fuse the heater is on, but you might have blown that too.