OK, so Sunday I take the RX out to the mall. No problem starting, etc. When i get back in the car 20 minutes later, it is idling really rough. I put it in drive (it’s an automatic) and it stalls. Try again, bang head on dash, repeat process... I manage to get it home by giving it gas and holding the choke out while braking for stops.

So, according to the threads I saw about these symptoms, I am working my way down the list:

- Changed gas filter
- Checked for vac leaks - none found.

Tonight I will tackle the ignition. So first question; what’s the easiest way to test the ignition, just pull the plug and hold it to the engine body, and check for a spark? I will probably end up replacing the distributor cap and wires anyway.

After that, the dreaded shutter valve. I didn't find anything in the archives describing how to test if it is working (just lots of discussions about ripping it out).

Question 2: So how can I test the shutter valve without removing the whole carb?

Thanks!

 

It sounds like the leading ignitor to me (2 little boxes on distrbutor- 1 leading, 1 trailing). You can swap them out and see if your idle improves greatly (probably will). As far as checking for spark you can pull the plugs like you said but I always shock the crap out of myself that way. Last time I just used my timing light. No light = no spark on that wire. Carb advice should come from someone else....

 

No, you actually nailed it there, ratboy.
The shutter valve shouldn't affect your idle that badly. It's ignition if it isn't a vacuum leak.

 

Thanks guys. So I can just swap the trailing and leading ignitors and see if it still stalls whe i put it into gear? If one is bad, what should I expect to see when I swap them? i.e. doesn't stall anymore but no power at higher RPM or something???

I'll give it a try tonight.