beatersubi

I started this a long time ago, but haven't had enough time to work on the car. I had gone over everything and I just had a feeling it was the gasket for the intake manifold. After getting most everything off the top of the intake, we could see where the gasket had blown out. Got her fixed up and she's purring like a kitten now. Reasonably easy fix. You just need to be mindful of how to take things off and how to put them back on. Two guys makes it go a lot easier when placing the gaskets and putting bolts back in.

All the same I checked out the hose, and I really thought I had it, but there is no change. I'm still hearing air sucking. Did some more research. I'm getting very small miss fires occasionally and read about leaky o rings on an injector. I'll probably pull off the intake manifold and replace all gaskets and replace the o rings on the injectors. It;s going to be on the back burner now though. I have to start work again.

yeah, Ifeel kinda stupid now after seeing what the brake booster is. I checked last night after talking to my Dad.

I guess I could have been more specific. The "smoke" was the cigar smoke I was trying to blow into the vacuum lines to find a leak. The engine was off and cool so I don't think it was oil burning off. Never had that problem in the past. I disconnected about a 1" hose off the main air intake which lead to the IAC. Lots of smoke came out from under the intake manifold, (just replaced the gasket on the IAC) but as the smoke was coming out from underneath it was hard to see. I am trying REALLY hard to figure out the vacuum lines with my chilton manual but just get more and more confused every time. I can hear air sucking like crazy but can't see what's going on short removing a bunch of the hoses and other stuff that's in the way Another note: In my search of vacuum hoses I've been reading about a brake booster. When I go to brake and I get the severe idling issues when slowing down I can feel the brakes losing it. I have read about a check valve on this break booster which is there so that when vacuum is lost it should keep your brakes functional. First what the heck is the brake booster? Is it the same as the Master Cylinder? Is there potential of a vacuum leak there? Is that entirely unrelated? Please pardon my lack of knowledge in regards to overall vehicle function, I am new to this and sorta flying solo. Thanks for the responses!

I was just playing around with it again and took it for another drive. I can hear a very distinct whistling sound up to about 2k rpms. I am hardly a mechanic, and correct me if I'm wrong, but wouldn't a leaking valve lead to overall poor performance? Would it be possible that it would only affect the idling. Since I saw all the smoke coming out from underneath the intake manifold I feel like I should get the new gaskets pull it off and see if anything is going on that I can't see from above. I've been all over the net trying to find answers. Similar symptoms on same model cars have all said the IAC or a vacuum leak. After taking off the IAC and seeing it was working, I guess I'm forced to look over the vacuum system and look for leaks before moving on.

hello again. Did some looking on you tube and found a guy who said you could check for vacuum leaks using a cigar. I tried it out and found a lot of smoke coming out from underneath the intake manifold. Looking at the chilton manual there doesn't appear to be any gaskets under there just the right and the left sides where it attaches. Maybe that trick doesn't even work. Is air supposed to come out somewhere under there? Even just blowing on the hose you can hear a good amount of air coming out on the drivers side half of the intake manifold. I notice that it sounds like a lot of air is being sucked in somewhere when it's running Just trying to get someone to bite on this if they have had anything similar or any other ideas. I'm tempted to take off the intake manifold or at least some stuff around it to get a better look to see if I can see more smoke coming out

Hello All, New to this forum. Relatively new to subis and am a relatively new DIY "mechanic" My 93 legacy is idling bad. Runs down highways fine. Will idle enough to keep engine running until fans kick on then its just to much and she stalls. I have read a lot of similar stuff on here but I'm still stuck. I have checked and cleaned the IAC and replaced gasket. Got the code (35 i believe) for the canister purge solenoid and replaced it. Upon replacing the later idle became a little worse maybe more pronounced. Currently have no CEL codes coming on. I'm fairly convinced it could be a vacuum leak or poor gasket somewhere. I "checked" around with the propane bottle but didn't get any spikes in the idle. I really want to know how I can check the vacuum system but don't know how. Any help would be very much appreciated.