Driving the car if u go wot or 50% throttle or more it misses once or twice like a missfire then the tach (rpm's) will go to zero yes 0. but the car still drives fine but the guages read 0.

no idea what it is? it has new o2 sensors. and new maf. what could it be. maybe fuel pump?

please help guys.

no ses light or nothin..

 

well the tach going to zero almost sounds like speed sensor. missing could be related to but not to sure there.

 

Check you battery terminals and ground...mine did that before. Took it to Chevy and they replaced my ground wire.

 

number 7 wire wasnt snapped in tight

 

working now?

 

hahah ya. sad thing was i was sprayin like this and it was hesitating then hitting on the bottle.