NorseKode Posted December 12, 2003 Share Posted December 12, 2003 1991 ea82 loyale 4wd 5spd. Its been running at or above 1500 at idle since I have owned it (3 weeks) but I figured the IAC was bad. It isn't. Pulled IAC connector at idle and lost 500 rpm. So much for that. Put the green connectors together, pulled the stopper from the bell, hooked up a timing light and let her rip. At the end of its' adjustment (clockwise) the IAC screw gives me about 1200 rpm with green continuity and 1300 without. And the timing marks walk, jump and skip all over the place, more or less at random, to the tune of about 10 degrees. Or more. Hard to be sure when they won't stop moving. So.... timing belts? ideas? Kalo Quote Link to comment Share on other sites More sharing options...
NorseKode Posted December 12, 2003 Author Share Posted December 12, 2003 Disty is bolted down tight. So, no easy outs there. Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted December 12, 2003 Share Posted December 12, 2003 vacuum leak - that's what I would be looking for. GD Quote Link to comment Share on other sites More sharing options...
TheSubaruJunkie Posted December 12, 2003 Share Posted December 12, 2003 With the idle higher, your timing marks will jump around. Once your idle gets lower, you will notice the timing marks stabilize. Is it cold outside? Time the car at operational temps. Also pull the vacuum advance and plug it before you time it. -Brian Quote Link to comment Share on other sites More sharing options...
myossfeece Posted December 12, 2003 Share Posted December 12, 2003 GeneralDisorder has the right idea, I to would suggest looking for a vacuum leak. Quote Link to comment Share on other sites More sharing options...
NorseKode Posted December 12, 2003 Author Share Posted December 12, 2003 OK. I have leaks at the EGR valve and the injector cap. I took the EGR off, cleaned the valve body and seat as well as the mating surface, gasket, and intake surface. Damned thing still leaks at the valve seat. As for the injector cap, there's a lead (injector?) running out the radiator side, just under the gasket. I can see (now that I'm looking) this lead has been acting as a fuel 'channel' for some time, giving airborne fuel an escape path. I don't know a lot about injectors or carbeurators, but shouldn't all the fuel be trapped on the other side of the injector o-ring? There was a fairly thick film of fuel "varnish" built up on the injector cap yesterday. I cleaned it off with carb cleaner, q-tips, and a blue towel. Is this varnish indicative of a failing injector or it's o-ring. Thanks so much for your help so far. This board is a phenomenal resource. Kalo :santa: Quote Link to comment Share on other sites More sharing options...
NorseKode Posted December 12, 2003 Author Share Posted December 12, 2003 Ok. So I walked out and looked down in the injector assembly just after posting that last. Obviously (now) since the injector is completely isolated (at rest) from the intake by that butterfly plate, airborne fuel is not necessarily cause for concern. Hmmmm.... in the process of pushing my luck, I chose to remove the injector cap. Naturally, the gasket cracked and broke. Luckily, I have yards of gasket material and a great shop. Here's the thing, though: there was a live ant right at the injector mount. I have noticed ants in the engine compartment a number of times in the past week. I thought they were from my apartment complex, but now I am starting to wonder. Is it possible something in there is food for an ant? Anyhoo, the leak is running through the injector gasket bushing. That is, two wires go into a rubber thing which mounts in a pocket under the cap gasket. On the other end of this bushing, the same two wires continue on to their destination. Fuel is running down the two wires, through the bushing, and out of the housing (still down the two wires) and allowing air to flow the other way. I'm going to try a dab of RTV to seal the outside, I guess. Thanks agian for all the help. Kalo Quote Link to comment Share on other sites More sharing options...
NorseKode Posted December 13, 2003 Author Share Posted December 13, 2003 Uhhh.... it occurs to me somewhat belatedly that the EGR valve is located directly above my head gasket leak (see attachment). So the 'smoke' I pressurized my vacuum system with for to find the leaks may just have been rising from the head to the EGR. Now that my valve mating surfaces and gasket are cleaned of carbon, maybe I should concentrate on the _real_ vacuum leak, no? :brolleye: Kalo Quote Link to comment Share on other sites More sharing options...
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