New-to-me '02 Navi Package - some questions

1. Kinda useless to guess before you get the codes. But...the violent shaking sounds like the steering wheel issue, but you would have probably mentioned the wheel shaking. It also sounds like a car of mine that had a rusted fuel filler neck (from cap to the tank). That happens to cars where it snows a lot. You can see it inside the passenger rear wheel well. Reach up and feel around the back side of the filler neck and especially up over the top right at the body/cap. Snow gets crammed up in that small place and rusts through eventually. Causes a vacuum leak in the tank and can also get water in the fuel.

2. Re: 3...if your AC isn't turning on, which it sounds like, not sure how you could do much about the smell unless you want to take the inside unit out. If you don't know, you don't want to do that if you can avoid it. You'll splinter the dash bezel. Instead, fix the AC and just pump fresh air through. I also pull the entire interiors out of each car I buy, down to the floor metal. Clean everything up.

3. Seems pretty clear that your compressor isn't kicking in. Most likely cause is it's low on freon. Techstream will give you the codes. If you want to know immediately, you can jumper two pins in the OBDII port and the AC controls will blink out the code numbers. I'm sure the instructions can be found searching the archive. Compressor is easy to get to if you remove the plastic cover, which is a little bit of a pain. You can hand spin the clutch, or put 12v on the connector to hear the clutch kicking in. Look for cloudiness in the meter. All the typical stuff. Could be as simple as replacing clutch shims - a few dollars and a few minutes.

 

I've used an ozone machine to get rid of smells and it worked great. I had agreed to carry several boxes of dates from LA to Houston not knowing what those smelled like. Don't ever do that. After two weeks of the odor not dissipating, I borrowed the neighbor's ozone machine and it was gone a few hours later. I've used their machine in my house too. works great.

Looks like they range in price considerably. Theirs looks about like the $80 models, buy it does a big room. Looks like there's a small, $30 model that could work for a car interior.

ozone machine - Google Search

 

Even as early as gen 1, we had the famous Prius drivetrain that turns any misfiring for any reason into violent jackhammering, because of the way the engine and transaxle interact. This article is a classic on the topic, being about a gen 1 that the owner let go for scrap price thinking the violent jackhammering could only be something really bad. With that car, it turned out to be one bad spark plug. In yours it'll just be something among the many things that can cause misfiring.

If this were the gen 3 forum somebody would probably have posted by now that it has to be your head gasket and because of the gen 3 EGR, but as you've seen, even an earlier gen without EGR, and without any reputation for head gasket issues, can still develop misfires for various reasons and still go all jackhammery.

When it happened to my gen 1 I never ended up finding the cause. It only happened every so often and I got 60+ thousand more miles on the car before a Dodge Dakota drove into it.

Yup, that makes sense. The cause will turn out to be any of the things that can cause random misfires. It's just, that's a lot of things.

I've also used chlorine dioxide, as described here, with very good effect. No machine required, just a little packet that gives off the gas.

Find a way to hang it from some string or something in midair in the cabin, not right next to some upholstery where the color could get bleached.

Unless I misremember, the gen 1 HVAC controller doesn't talk on the diagnostic bus, so its codes don't show up in Techstream. You can only ask directly from the HVAC controls and count the blinks. Details on this page:

Blink (a/k/a Flash) Codes – How to. | PriusChat

when you scroll down to "Codes from the heat/air conditioning system" and follow the procedure for gen 1. Code 23 would be a refrigerant pressure issue. Code 22 would be slipping of the magnetic clutch (which only gen 1 had). It only costs about a buck to adjust that clutch and if it hasn't been done by now in a gen 1, it's likely ready for it.

 

Of course, you can always try some simple things, like swapping around the plugs, coils, and injectors to confirm whether the misfire codes follow any of those. Just make sure you clean/blow around those holes so nothing falls in the head when you pull them out.