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1300 RPM at idle, IAC screw at end of adjustment
Posted 11 December 2003 - 10:01 PM
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.
Posted 11 December 2003 - 10:54 PM
Is it cold outside? Time the car at operational temps. Also pull the vacuum advance and plug it before you time it.
Posted 11 December 2003 - 11:04 PM
Posted 12 December 2003 - 12:15 AM
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.
Posted 12 December 2003 - 12:40 AM
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.
Posted 13 December 2003 - 04:38 PM
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