Thread: V-6 craps

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bear with me, new to this, need help, have 4.3 L. chevy (V-6) T.B.I. on start up runs great for a few minutes then turns crappy (rich) get comp. code for O/2 sensor, replaced twice still same. I installed the sensor in the header just below the flange is it too hot (too close) to the head there???

to Denny in Illinois, thanx for your comments, I will proceed to re-locate that )/2 sensor and see what happens, makes perfect sense, will report back on it later. thanks again.
Wayne in B.C.

what codes are you getting T-Rod ?

presently not getting any codes, was getting code 45. Car has been sitting for couple months. Has persistent problem after a few minutes warm-up, it starts to crap and run rich and back-fire, smooths out on rev-up, but fumes "ll rip your eyeballs out.

ive put the o2 senser in the exhaust in front of the flange and behind it and they worked ok. the LT1 o2 is in the hottest part of the stock manifold. 6" fromm the head. im not say it cant be but id look at the temp. sensor and map senser also. make sure you got vac. to you map sensor.