jeff1953
OBS Enthusiast
Put the o2 sensor in but have not drove, my other problem is the ESC and I replaced it not to long ago because it set a code and it still sets a code after putting a new one in. got any ideas on that, and thank you.
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Did you check your Knock Sensor and connections to it and the ESC module? The ESC module and KC must be mated and designed for the specific year/engine.is the ESC and I replaced it not to long ago because it set a code and it still sets a code after putting a new one in.
Inside a 700R4, the 1-2 accumulator is a piston that, under increasing fluid pressure, compresses a spring inside a chamber. This controls the firmness of the 1-2 shift. Due to age, the piston often breaks off the center shaft and tilts off-center. The somewhat stuck piston causes the fluid pressure to build to a much higher level (and delay the shift) before it gives way and allows the shift to occur suddenly (to say, hard).My truck like to randomly idle very high while in gear (not in neutral) and hard shift 1-2 gear with 700r4 (4l60 non-e). However, most of the time its fine and runs smooth as silk. I've recently replaced the tbi gasket, fuel pump, and tps. I've gone through all of the vacuum lines and replaced any that seemed suspect. I'm not sure where I should be looking anymore. Any tips?
1st thing I'd check is your fuel pressure, it s/b 9 - 13PSI per GM specs but, if it's lower than 10 you'll have issues. Then get a scan tool and see what's going on.Anybody have an idea of where I should start trouble shooting next?