Hey friends,
I bought an '85 Brat with an EA81 in it a week ago today and immediately had some adventures (due in a large part to my own stupidity) that I've mostly gotten worked out, but they helped turn up some other issues that I need help with. Apologies for my tendency to write essays, hopefully it's not too rough for people to get through, it seems like you are all a really helpful bunch(I've been reading a lot and the forums have already helped me solve some problems.)
1. Right hi beam lamp doesn't turn on, but the low beam lamp gets really dim when I switch on the his is there a relay that controls the switch, I only have a chilton's manual so far and combing through the circuit diagrams would take a magnifying glass so I'm hoping people will have some thoughts. I'm going to go back out in a bit a check with my multimeter to see if the hi beam lamp is getting any power at all, but it isn't putting out any light.
2. The stupid problem that I caused was by pulling the dizzy to replace the coolant hose through the intake manifold without marking the dizzy. I learned A LOT about engine timing this weekend I have the timing set a hair past 8* now and had to up the idle speed quite a bit (stock hitachi carb) to get it in the 800rpm range, and it's running pretty happily except that it backfires when you let off the accelerator if you open the throttle up more than 1/2 or so. Looking at the timing while working the throttle it looks like the vacuum advance isn't working, (the timing goes back across TDC and keeps retarding the more you open the throttle) but there's definitely vacuum pressure on the line. I was wondering if it's possible to do any maintenance on the vac advance or if I need to just plan on hitting the junk yard (not going to pay $300+ for a whole new dizzy just to get the advance which is the only option I've found so far.) I sprayed carb cleaner around and haven't found any vacuum leaks so I don't think it's just an issue with insufficient vacuum pressure, but I could certainly be wrong.
I don't think it could have any relation to an advance problem, but I haven't checked the valve adjustment yet, I should be getting the valve cover gaskets tomorrow so I'll do it tomorrow or Sunday along with compression testing the cylinders and I think that'll mostly conclude the pantheon of basic timing/carb related diagnostics. Guide me if I'm wrong about that please.
3. I got a weber 32/36 bolted to an intake manifold with the brat when I bought it and I've ordered a rebuild kit for the weber but I'm wondering if there's any way to tell if the intake manifold is for an EA82 or an EA81 by looking at it. I know that the 82 is supposed to be more free flowing so if that's what it is I'm inclined to swap that too, but if it's the same thing then it doesn't seem worth the work to swap both the carb and the manifold for no gains from the manifold(except new manifold seals.) I know I could just look at the manifold and compare it to what's on the engine right now, and I have, but the stock carburetor really obscures the manifold and I'm not totally sure of what I'm looking at, I don't see major differences, but I'm thoroughly uneducated.
4. It's kind've piddly, but the dome light isn't working. I replaced the bulb and no dice, thoughts on other things I can check?
I'm really loving the brat, I have a 05 Forester that I like a lot, but there's something that really makes me grin about driving around with the t-tops up. It has a lot of character.