How much improvement should I see with the break-in?
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3. Couldn't find any leaks at manifolds. Mating surfaces are cleaned and prepped, gaskets are new. Shouldn't really be leaking anything.
4. I used a piston compression tester, which I know isn't accurate. With valve depressed: front rotor 70, 70, 80; rear rotor 80, 80, 90. These are approximate, mind you. And with valve released max compression readings: front rotor ~110; rear rotor ~120. That was a while ago, though. Maybe it's different now.
3a. what did you block the ACV off with? the ACV has passages to the exhaust and the intake, so it can leak vacuum/exhaust etc and it can do it without leaking to the outside.
4. your compression looks (and sounds) fine.
have you tried shooting a little brake/carb cleaner right into the intake? if it smooths out its lean. i assume the injectors are original and uncleaned?
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I have the standard ACV block-off plate, and I used ACV gasket under the plate, for sealing. I don't think anything leaks between exhaust and intake. This engine doesn't even have the square ports typically used by the ACV. I'm not sure why that is, but that's how it is.
Injectors are original, but I had them cleaned at Carb Conn a few years ago, so they shouldn't be clogged and should flow pretty good. However maybe their electrical is malfunctioning or something, and they misfire. I listened to their clicking, and it sounds consistent... I donno, I think I'll still take them to Witch Hunter and get them tested again, since it's cheap.
I tried propane into the air filter, and honestly I couldn't tell if it did anything at all. Like I literally held a propane bottle over the air filter with some gas flowing, and saw zero effect. Maybe I need to give it more...
Injectors are original, but I had them cleaned at Carb Conn a few years ago, so they shouldn't be clogged and should flow pretty good. However maybe their electrical is malfunctioning or something, and they misfire. I listened to their clicking, and it sounds consistent... I donno, I think I'll still take them to Witch Hunter and get them tested again, since it's cheap.
I tried propane into the air filter, and honestly I couldn't tell if it did anything at all. Like I literally held a propane bottle over the air filter with some gas flowing, and saw zero effect. Maybe I need to give it more...
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I have the standard ACV block-off plate, and I used ACV gasket under the plate, for sealing. I don't think anything leaks between exhaust and intake. This engine doesn't even have the square ports typically used by the ACV. I'm not sure why that is, but that's how it is.
Injectors are original, but I had them cleaned at Carb Conn a few years ago, so they shouldn't be clogged and should flow pretty good. However maybe their electrical is malfunctioning or something, and they misfire. I listened to their clicking, and it sounds consistent... I donno, I think I'll still take them to Witch Hunter and get them tested again, since it's cheap.
I tried propane into the air filter, and honestly I couldn't tell if it did anything at all. Like I literally held a propane bottle over the air filter with some gas flowing, and saw zero effect. Maybe I need to give it more...
Injectors are original, but I had them cleaned at Carb Conn a few years ago, so they shouldn't be clogged and should flow pretty good. However maybe their electrical is malfunctioning or something, and they misfire. I listened to their clicking, and it sounds consistent... I donno, I think I'll still take them to Witch Hunter and get them tested again, since it's cheap.
I tried propane into the air filter, and honestly I couldn't tell if it did anything at all. Like I literally held a propane bottle over the air filter with some gas flowing, and saw zero effect. Maybe I need to give it more...
acv and injectors sound like they should be ok, unless the injectors sat forever while the motor was being built
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They sat for maybe 4-5 months, but then again it's not like I put them into a pile of dirt.
Based on the video, what does it look like is happening?
Based on the video, what does it look like is happening?
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seems like something is making the mixture inconsistent.
have you checked the water thermo sensor yet? what it the exhaust like?
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I have a new a new water thermosensor... The connector seems to be ok, as well, although getting to the point of being brittle. I have a new connector housing that I'm gonna swap on. It's possible the harness itself has a problem, even though I got spec voltage at the ECU with warmed up engine.
What do you mean about the exhaust? It's smelly, but that's because I have no cat. There might be a hint of fuel in it, but I can't tell.
What do you mean about the exhaust? It's smelly, but that's because I have no cat. There might be a hint of fuel in it, but I can't tell.
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Oy, what's the proper way to check if injectors are spraying consistently? I read somewhere that pulling them out, turning on the fuel pump, and then turning the dizzy by hand should trigger the injectors to fire. I tried that, and they didn't fire, and I can't find that thread where it's explained.
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What you can do is take out the fuel rail and injector, hold both the injectors tightly with your hands, and position them over a container to collect the fuel. While your doing this, have another person crank over the engine. Then just look right at the fuel spray pattern. If they're dropping fuel as oppose to misting, then cleaning is due, also if you want to make sure they both flow the same, take 2 identical clear bottles, and run the fuel in there for a while and compare volume.
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If I'm just doing it by myself, I can't really crank the engine AND look at the injectors. I remember something about taking the distributor out and turning it and the trailing igniter triggers the injectors. Is that supposed to work?
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I could, but my friends don't live very close, so to call them over just to crank the car for a few seconds seems kind of rude. Heh. Maybe when there's something else going on.
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Update. Well, not really...nothing new to report.
I replaced the engine harness with a good tested one. I got a new distributor. I tested the ignition harness for continuity. I got my injectors cleaned and tested one more time.
No dice. Same thing. Shakes pretty harsh at idle, when revved it smoothes out but does an occasional jerk, just like in the video.
I can't think of anything else to check/fix.
Maybe it's the engine, after all. But what could be wrong.
I replaced the engine harness with a good tested one. I got a new distributor. I tested the ignition harness for continuity. I got my injectors cleaned and tested one more time.
No dice. Same thing. Shakes pretty harsh at idle, when revved it smoothes out but does an occasional jerk, just like in the video.
I can't think of anything else to check/fix.
Maybe it's the engine, after all. But what could be wrong.
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I would hope Rob knew what he was doing. Unbalanced assembly would probably vibrate all the time pretty evenly, it wouldn't just randomly jerk and misfire, would it?
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Yeah, I took my injectors to witch hunter only couple weeks ago, he serviced them but he said they were in pretty decent shape anyway.
Alright, gonna look for a leak or something...
Alright, gonna look for a leak or something...