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Post by olof on Mar 22, 2018 14:02:57 GMT -5
Greetings!
The Justy wont start! After lots of head-scratching and troubleshooting with my friends we are all at a complete loss. So I have decided to venture out into the land of tubes in search of answers. Hopefully someone can help me diagnose this issue! Let me explain.
Maybe I should start from the top. Months ago some friends of mine acquired a 1989 Subaru Justy, this thing is in great shape! But it had no engine. Over the following weeks the search for a donor engine commenced, and eventually a beautiful new engine was dropped into this beauty. We installed a weber carburetor, tuned her in, checked the compression, and fired it up! The Justy ran great for a week or so and then we noticed the engine knock above 3000rpm. Since we noticed the knock so soon, we quickly swapped the crankshaft bearings and viola! No knock! The car ran great and sounded spectacular for about 100 miles.
Then one day my friend goes to fire up the Justy and it just wouldn't start! The engine turns over twice or 3 times then lurches in the compartment. It runs for maybe half a second and then dies. We checked the timing belt, opened the heads and saw no damage, popped the bottom end open and everything looks great. Now we are just stuck. The engine lurches this way with the spark plugs disconnected when we simply try to turn the engine over electrically. But when we pull the spark plugs , it doesn't lurch and turns over just fine.
I don't know what to do next with this thing! SOS
I would be so grateful if anyone could chime in with some advice for what I should try next! I want this Justy to run!
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Post by olof on Mar 22, 2018 18:54:55 GMT -5
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Post by deegore on Mar 23, 2018 0:52:42 GMT -5
Take off the distributor cap and have a look. Sometimes the screw that holds the rotor in place falls out and causes problems. Also check the wires that come from the pickup coil (crank angle sensor). They tend to get brittle and short out or break. Especially where they exit the distributor and around the green connector underneath the distributor.
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Post by olof on Mar 26, 2018 13:40:50 GMT -5
Okay I checked the wires and the bolt that holds the rotor and all that seems in good shape. I replaced the spark plugs and have been messing with the angle of the distributor cap and now I'm getting less lurching but she still wont go! Now it sounds like she wants to start though but it just wont! I'm pretty sure when I turn the Distributor cap counterclockwise thats retarding the ignition fully? Thats what gives her the best chance of starting but I'm just getting backfires, or nothing at all other than the starter going off when I try to crank it. Not sure where to go from here!!!
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Post by olof on Mar 26, 2018 14:18:32 GMT -5
With the Distributor cap turned to 80% retarded, I can gold down the gas pedal and turn the key, and get 4 slow whoomphs out of it now... like whoosh..........whooosh..... whooosh..... then it just dies.
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Post by olof on Mar 26, 2018 16:06:08 GMT -5
And if I feather the gas pedal it will do those slow whoomphs over and over, like every 2 seconds for about 15 seconds.
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Post by deegore on Mar 26, 2018 16:50:44 GMT -5
Maybe the timing belt jumped a tooth?
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Post by olof on Mar 26, 2018 19:28:21 GMT -5
Okay I just took off the belt cover ( somone cranked the wheel on way too hard so that was a pain in the ass ) the timing belt is correctly installed. Could the timing belt be a whole 360 degrees off alignment? I put it all back together because everything there checks out fully. Still no zoom zoom!!! Ideas on where to go from here? I'm just getting all backfires when i try to fire it up.,
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Post by deegore on Mar 30, 2018 1:15:51 GMT -5
Just a thought, I've had the adapter plate for the Weber come loose and cause a huge vacuum leak.
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Post by alex on Apr 6, 2018 12:54:51 GMT -5
Carbs will backfire running lean. Vaccuum leaks will cause the engine to run lean, or timing will cause it to backfire. If your timing is fine, which it sounds like, i would make sure the spark plug wires are in the correct order and there are no cross sparks. Then check all the vaccuum lines attached to carb, unplug 1 by 1 and examine each one throughly. The vaccuum advance to the distributor should be checked as well. I hope this helps
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Post by olof on Jun 7, 2018 18:57:07 GMT -5
Just a thought, I've had the adapter plate for the Weber come loose and cause a huge vacuum leak. just checked and the carb is tight
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Post by olof on Jun 7, 2018 18:57:44 GMT -5
Carbs will backfire running lean. Vaccuum leaks will cause the engine to run lean, or timing will cause it to backfire. If your timing is fine, which it sounds like, i would make sure the spark plug wires are in the correct order and there are no cross sparks. Then check all the vaccuum lines attached to carb, unplug 1 by 1 and examine each one throughly. The vaccuum advance to the distributor should be checked as well. I hope this helps checked all the vaccum lines and they are in good shape distro is electric
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