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well i have a problem. i just got done rebuilding my engine. i put it together, it's timed properly, and it backfires. about every 15 seconds. it's got new points. new wires new plugs. i haven't timed it with a light yet but it runs fine where i've got it accept for the backfires and a lack of power. i'm getting a timing light tomorrow. but i don't think that will help. could it be my vac advance? i'm at a los. help!

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1980 luv 1.8 finally running!!!...... and then like a moron i sold it
got another one!!! 1980 mikado. v8 swap here we come... nope divorce and cross country move happened.
got another one!!! 1980 4x4 mikado sport. rusty beater for now...

Is it backfiring out of the exhaust or the carb?

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Certified pilots, looking down on people since 1903.

the carb. but not huge backfires just a little bit and if i try to drive it it lacks alot of power. and it backfires more.

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1980 luv 1.8 finally running!!!...... and then like a moron i sold it
got another one!!! 1980 mikado. v8 swap here we come... nope divorce and cross country move happened.
got another one!!! 1980 4x4 mikado sport. rusty beater for now...

well i guess nobody has any idea's so i guess i'll just try putting this thing in there

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1980 luv 1.8 finally running!!!...... and then like a moron i sold it
got another one!!! 1980 mikado. v8 swap here we come... nope divorce and cross country move happened.
got another one!!! 1980 4x4 mikado sport. rusty beater for now...

If your talking about putting in that electronic distributor You will need a cap for it. The older cap wont work and when you get it watch out for the firing order on the new cap it shows a rotating the opposite of the old one. Keep the wires on the old one and transfer them to match. The 2 and 3 are reversed.

What is your advance set at?

Did you do a lean idle adjustment?

how do you do a lean idle adjustment? and i don't remember what i set the timing at i think it was 6 degrees b-tdc i'm not sure i check again though. i've tried changing it but it does the same thing.[/quote]

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1980 luv 1.8 finally running!!!...... and then like a moron i sold it
got another one!!! 1980 mikado. v8 swap here we come... nope divorce and cross country move happened.
got another one!!! 1980 4x4 mikado sport. rusty beater for now...

You said lack of power, and I bet when you get on it hard the backfiring gets even worse.

I've driven 5 miles this way after a rebuild once since the engine seems to do okay at idle.

The wires for 2 & 3 are probably swapped now.

-DK

Yeah, I think 6btdc is book. That's a good place to start. You had the distributor disconnected when you set it, right?

Someone else here (and I apologize I don't remember the author) had a post about running the engine up to 3000 rpm, and then setting it for about 30 degrees with an advance timing light. I just tried that yesterday. I was about 6 to begin with, and now I think I'm about 9 btdc.

As for lean idle, each carb has a sequence to go thru. My truck still had a cherry decal on the inside of the hood for instructions. That went out the window when I got the Weber, cause it has it's own instructions. The tech manual will give you an idea of what you should be shooting for.

It's what is says it is--"lean" idle. Basically, (and I mean basically) you turn the idle mixture screw in until the engine starts to die, and then back it out until you get a smooth idle. Then, you fine tune the idle with the idle adjustment screw.

Keep us posted--

firing order clock wise 1342 right? if so it's not the wires. and i noticed today that it ran ok when it was cold and didn't start sputtering until it warmed up. maybe it is running too rich at idle. i'll check the timing again monday. i gotta work this weekend

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1980 luv 1.8 finally running!!!...... and then like a moron i sold it
got another one!!! 1980 mikado. v8 swap here we come... nope divorce and cross country move happened.
got another one!!! 1980 4x4 mikado sport. rusty beater for now...

The firing order is right, b-u-u-t, I thought it was counter clockwise. Now you've got me curious. I'll have to go kick the engine over and see.

hmmm that would put my 2 and 3 backwords and the 1 and 4 would still be right. i'll have to check that monday

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1980 luv 1.8 finally running!!!...... and then like a moron i sold it
got another one!!! 1980 mikado. v8 swap here we come... nope divorce and cross country move happened.
got another one!!! 1980 4x4 mikado sport. rusty beater for now...

counter clockwise

well i got it figured out but now she's running really rich. but it did that before. i think the idle richer thingy is stuck at richer or something. thanks for all your help. i feal really dumb. it wasn't the 2&3 but the 1 and 4 were backwords. man i'm a moron.

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1980 luv 1.8 finally running!!!...... and then like a moron i sold it
got another one!!! 1980 mikado. v8 swap here we come... nope divorce and cross country move happened.
got another one!!! 1980 4x4 mikado sport. rusty beater for now...