[ShadeTree93]

Hello, well I failed the smog test. I kinda knew I had a fuel consumption problem but didnt realize how bad. Typical fuel consumption during the test is 1%. I pulled 14%. Ouch! They said there was a leak in the emmisions system somewhere so I'm trying to track it down. I cant find a very good schematic of the sys but upon looking under the hood i did find this.

the white and black tips were unplugged and there was a hose going into the throttle linkage then tee'd off into the dash just above the foot brake that was disconnected and rather deteriorated. What is this, and should both be plugged?

Also,

I removed the A/C unit and there was a hose that looped into the spot that currently has the small piece of tube with the screw in it. Should I continue to keep this plugged or let it breathe free?

More questions to come...!!!!!

Thanks, guys

 

[rufant]

Not sure what the first picture is of. My 94 doesn't have it. Possible part on the cruise control from your description, just a guess though.

The fitting in the second picture is just a blanking plug on mine.

What i can say is that any hose/fitting post air filter and MAF should not 'breathe' freely. It will suck in un metered and un filtered air. If it sucks in air while the engine running it should be connected to something.

 

[ShadeTree93]

Not sure what the first picture is of. My 94 doesn't have it. Possible part on the cruise control from your description, just a guess though.

The fitting in the second picture is just a blanking plug on mine.

You are right, it is the cruise control module. So that one is out.
Well, it looks like i'll be cracking open the rear end to get to the rest of the emissions stuff. Any likely spots to look at for leaks once im in there?

Also, the rave manual says if you pressurise the evap sys to check it, only use compressed nitrogen and not compressed air. Is this because the air will create static in the lines? (kaboom!)

 

[Laurie]

Also, the rave manual says if you pressurise the evap sys to check it, only use compressed nitrogen and not compressed air. Is this because the air will create static in the lines? (kaboom!)

Probably so you can use a nitrogen detector to find leaks.

 

[bandit86]

take the pvc out and clean it, it's probably clogged, the gray canister on the valve cover. also clean the little filter in the other valve cover.

look for a post on steam cleaning your engine, did wonders for my rover.

basically I hooked up a hose to the one yours is blocked off, and when the endine is hot I dipped the hose in water. it will want to stall so give it gas while doing it. it will steam clean any carbon from tyhe engine, cats and o2 sensors. left a puddle of black much behind my truck.

you can also add half a quart of ATF into the oil when hot and run it for 10 mins before changing oil. check your air filter. your MAF can be cleaned with pure alcohol contact cleaner.

 

[ShadeTree93]

Alright, I bought a new flame trap a couple weeks ago so its not that. I removed and cleaned the other small filter but was only able to get the plastic cover off. Does the whole tee shaped stem come off for cleaning?
I sealed off the small hole in the manifold. in doing this the motor drops in idle and seems to run better. I didn't realize how much air that little hole sucks in. I also went ahead and did a little "internal steam cleaning". Don't know fo' soure' but it feels a little smoother. While I was in there I also adjusted the TPS. It was off by 100 volts. (230'ish vs, 325)
Next is the timing. The smog shop said they were unable to get an accurate reading because the RPM's were flucuating too much. How do I fix this?
Thanks guys!!