I have a 89 camaro iroc 350TPI and the car won't ilde unless I hold down the gas and then it will stay running...new fuel pump,new fuel press reg,tune up...pulled some codes and they were 21,33,45..and another was something to do wit the egr valve...almost done putting the new one on..need help wit the other codes...the cats were cut off as well...

 

code 21 - TPS voltage high when MAP reads low pressure

code 33 - MAP reads high manifold pressure (low vaccum) with the throttle angle is <=2% (read from the TPS)

code 45 - O2 sensor reads rich exhaust condition and that can be for a number of reasons

I think the three codes are indicating a TPS Issue. I would start by checking the voltage on your TPS low/high of .54/4.5

 

alright so this would be my first time adjusting it..I know how to jump and all that..so if it's over 4.5 it's to high then bring it down to what

 

I checked the tps and it was .55 to almost 4.5v

 

i had an issue with my TPS also. With the engine idling, try to wiggle the connector, if the idle changes it is most likly a loose connection. To solve this I took a skinny needlenose pliers and pinched the connectors in the TPS a little bit and it took care of the problem.