Hey guys, so my car will start up fine and if i give it gas it will run fine. But when i let it idle it will stall. Also, the revs drop substantially when i take my foot off the gas at speed. Everything I've looked at so far says to start by checking the vacuum lines. Is there any other advice you can give me, or has anyone else had this problem before?

 

Recent tune-up? Clean the MAF, IACV, and throttle body? Is your check engine light on?

 

no, will do, and yes.

 

Make sure to keep the motor end (the end with the electric connector) up when you clean the IACV. Don't want carb cleaner to run in there.

It may help if you could get the codes read (autozone etc) and post them.

 

Being a '93 is not very likely that you have an OBDII connector on the center console above the shifter to the left of your cigarette lighter but it doesn't hurt to look. If you don't have it then you won't be able to get any of the part stores to read your codes as they don't have a connector. You'll need to use the diagnostic panel under the hood to pull the codes yourself.

If you clean the throttle body make sure you don't use general carb cleaner. The throttle bodys throttle plate has a protective coating to keep it from corroding as the tolerance between the throttle plate and the bore of the housing is very close. Carb cleaner will eat the coating off and clean it so well it can either rust or corrode and then it can stick or seize in the housing bore. Use a cleaner that's safe for throttle bodies.

First picture the self diagnostic panel you do have that you'd have to pull the codes yourself.
Second picture is where the OBDII port would be just above the shifter on the left (under a coin holder).

 

I did not know that. I've always bought throttle body cleaner, 'cause everything I have is fuel injected (well... crappy TBI for the Jeep haha) and that's what the label says it's for.

 

The one I'm not as clear on is the MAF cleaner. They make yet another single purpose chemical for cleaning MAFs but I'm not sure how different it is from carb or TB cleaner. I've used TB cleaner and I know a lot of people who do also for cleaning MAFs and so far without any adverse affects (that we know of !!).

 

I will admit that I have a can of MAF cleaner as well. It evaporates immediately with no visible residue. It would probably be great for cleaning all sorts of electronics.

Mechanic friend of mine cleans them carefully with simple green in their shop. Seems they are pretty resilient.

 

Ok, now we're going to have words

I'd be really leery of using something like Simple Green or anything that is an aqueous solution. That just seems more thrifty than smart. Two reasons, one it might leave a film that would attract dust and dirt and the other is it could promote rust or corrosion from the solution finding it's way to metal and especially circuitry.

The aerosol cleaners are solvents and dry quickly. They also have an acceptable pressure to blast away the dirt without blasting the component as can be done with an air compressor and nozzle to "blow it out".

I think we lost Mushypeanuts ??

 

sorry guys i've been really busy and forgot about the thread. thanks for all the info and ill keep you updated when i get to fixing it. thanks