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A strange tail

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jlaird

jlaird

Great Pumpkin
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My carbs are the same numbers but they are different.

My rear carb is 1/8 thinner than the front one. It seems to be in the flange that bolts to the intake manifold.

This does not allow the shafts to line up and in fact causes them to bind a bit down at the idle position.

Tomorrow I will add a couple of gaskets to align them and then see how the idle works with out that bind.

Comments?
 
The float bowl Tags can be BOGUS!

DPO could have messed them up. Who knows?

Good Luck

Steve
 
Yup, this is surely a who knows.
 
Could you use different thicknesses of insulator/spacers to line them up?
 
Aye, actually I could cut down the thicker one. However, I think I will add two gaskets. Seems the easier way to do the job and check results.
 
Not too fast this morning. Had to make three gaskets to get it to line up. I had lots of HS2 gaskets but no H1s. Can not immigian how that happened.

Man is it humid out there.
 
Ok, all back together, operates smooth, carbs balanced but still idles too high.


Am I correct. Only thing I can think of now is that the mixture is too rich, way too rich thus the high idle. Guess that's next soon as I dry out. If I cannot get the jet up flat with the bridge in the throttle body maybe I need to drop the needles just a bit? In fact the jet is preaty deep in the throttle body at the present setting which I have not changed since I started this.
 
Ha, front carb open 24 flats, rear 18 flats. Wonder it ran at all. Just goes to show how forgiving these carbs are.

Guess one turn open for a start would be a lot slower idle. Think there are only 6 flats per turn.

That's for next trip out. Man is it humid, also thunder storms in area, about 10 min is all I can take.

You notice I tell all the nasty dumb things I do.

Just looked at shop manual under Falt Diagnosis, Fast Idling. First item is Rich fuel mixture. Maybe I should look at the book more often.
 
A caliper measurement with the dashpots removed is a good starting point.
 
Ok, I can make it run with one turn down on the mix adjusting nut.

Next trip out will be seperate the carbs and open the rear idle one turn and back off the front till it is closed.

Then do the same with the front.

Then balance.

Hasn't cooled off a darn bit.
 
Two words Jack. BIG FAN. Just don't let any animals get their "tail" caught in it. It would make for a funny tale. :wink:
 
I have a big fan in fact, wife insisted do I got it out of the overhead. Helps a bit but not a lot.
 
Ok, did all the above, still remaining is final mixture tune. Still can not get idle below 1K. Maybe I need to drop the needles 1/64 inch and try that. They are standard GG needles.
 
Noop, that does not work.

Have everything back to spec. still idles with screws all the way out at like 1500 rpm.

If the buterflys are closed how is fuel getting in that engine to make it run?

What the heck?
 
Overnite I have come to the conclusion that I must have an air leak someplace.

That's todays plan in any case.
 
That was what I was just about to post Jack, you have to have some air coming in somewhere where it shouldn't!!!!! Have you ever used the propane trick to find a vacuum leak?
 
No, but I tried the carb cleaner. It seemed the intake/exhaust manifold bolts were loose some. Tightened em up and tried running it again. Seemed better for sure but too hot/humid here. Will go back in a bit and try tuneing again.

That is after I check with the carb cleaner again. If still problems new manifold to head gasket will be in order. Just happen to have one.

Hope I have this on the run. Hehe, speeking of running Miss Agatha never before ran like she was at the Loto. Guess I should also check head bolts and valves as well. Along with anything else I can get a wrench on.
 
Yup, Carb cleaner just as good!! Probably time to do a once-over on everything being tight now that you have run her a bit Jack!! :wink: :thumbsup:
 
Yes. Agree, now that I am dried off again.
 
Whenever I've had an air leak the car won't idle at all or requires choke to keep running. I've never seen vacuum leaks make my car idle fast.

Jack, I know you've done this a million times. However, did you release the choke linkage completely during your adjustments, including backing off the fast idle screw? It's also been a while since I've looked at H1 carbs, but is there a chance that something is holding one of the jet tubes "down" a bit when the choke is pushed in... so that you're letting in a bit more gas than you expect?
 
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