Thank you, but I have had to unplug it for now as the guy I got the car from took most of the lines off cause of dry rotted and the car was running terrible when I got it. He removed the evap or charcoal canister as well, I finally hooked the pcv valve back up with the two lines on it, he had it plugged off as well. The car is running good now but I will look and see if any more plug offs are anywhere, but without the evap charcoal cannister there probably nothing I can do. thanks again for your helpIf that is the purge valve, there should be a spot on the intake manifold that you hook the vac line up to. The valve is hooked up to the evap canister and opens and closes to burn off gas fumes from the tank when the car is running, also when filling the car with gas, it pushes gas filled air into the charcoal canister to adsorb it for use later instead of venting it to the air as pollution.
Here is some diagrams hope they help!
View attachment 218896
View attachment 218897
Where do I plug the scan tool in? this is a 94 model and I can't find anywhere under the dash to plug anything in. My wife's 2000 does have a spot but not my 94 model. thanksIf you have access to a scan tool you can plug it in and drive with, you should check the fuel trims. If you have open tubes on the vehicle it could be sucking in extra air causing it to burn lean causing the engine to run bad. Any leak past the mass air flow sensor will be un-metered air that is not accounted for causing the computer to adjust the fuel mixture and use more fuel to try to compensate for the leaked air. However it can only adjust it so much, so if it's a really bad leak it can't compensate.
Also the missing evap canister could cause you to lose a little MPG also. Leaking fuel tank fumes to the air instead of capturing them and burning them later adds to your cars MPG, not sure how much MPG, probably not much. You can buy a new canister for around $60-$150 which depending on how long you keep the car and gas prices could save you money in the long run.