Hey everyone. I am having a slight problem with my ZJ. It seems to sometimes have a hard time finding idle speed after coming down from a higher rpm, for instance letting of the gas to decelerate or after revving in neutral. When it comes down to idle it goes to a too low of an rpm and takes a second to find idle speed. Sometimes it stalls out completely. I'm pretty sure its not a vacuum leak and I tested fuel system pressure just to cover my bases and its spot on at 49 PSI.
Does anyone know the proper procedure to check TPS, IAC, MAP sensors with a multimeter to see if the are bad or going bad. My service manual is pretty vague.
Also CEL will not illuminate on start up (good bulb i checked) but there are no codes anyway. Just another problem.
Thanks for the help. Any other ideas are welcome!