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Re: I have a problem I can not solve. confused smiley
Posted by: red64vair ()
Date: March 15, 2017 07:32PM

Tomorrow I will run it with the vacuum advance unhooked and tube plugged.

Larry Blaylock
Saltillo, Mississippi
64 convertible
66 customized Corsa coupe


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Re: I have a problem I can not solve. confused smiley
Posted by: 63turbo ()
Date: March 15, 2017 07:43PM

Isn't there a simple way to at least roughly check the lift on each valve?
lord know's engines can do some funny things when the cam is going bad, or has gone bad, as I discovered!

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
engine less 62 Spyder
Canadian 64 Monza Parts car



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Re: I have a problem I can not solve. confused smiley
Posted by: red64vair ()
Date: March 17, 2017 11:42AM

Driving with vacuum advance disconnected and tube plugged did not effect engine miss. Same connected or not connected.

Larry Blaylock
Saltillo, Mississippi
64 convertible
66 customized Corsa coupe


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Re: I have a problem I can not solve. confused smiley
Posted by: MattNall ()
Date: March 17, 2017 12:08PM

What a bummer!! This is frustrating for all of us!! But you especially...I'm sure..


Reminds me of 2005.. Rich Shepard's 140 had a 2500 rpm miss.... tried everything... even Ken Hand and a few other racers were there prepping their cars...

Rich said "screw it" I'll run it 'til it blows...

On the 60 mile drive to PIR... it cleared up!

Had to have been a sticking valve??? Engine lived with 3 drivers until the input shaft snapped in the afternoon... still runs fine today!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: I have a problem I can not solve. confused smiley
Posted by: jcorvair ()
Date: March 17, 2017 12:15PM

Are your plug wires okay or were they replaced with the other ignition components?

James
Maple Ridge, BC

1965 Monza Coupe 140/4spd, Factory '66 headrests, rear antenna
2013 Hyundai Santa Fe Turbo
2013 Hyundai Elantra (daughter's future car)
2009 Silverado HD Crew Cab 4x4 (for haulin cars, trailers, fifth wheels, quads, etc.)
2013 Victory Car Hauler (enclosed)
2015 Polaris 570 EPS
2016 Polaris 570 SP

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Re: I have a problem I can not solve. confused smiley
Posted by: 63turbo ()
Date: March 17, 2017 03:54PM

I think the next thing to do is richen some more, and check that all the plugs are the same color.

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
engine less 62 Spyder
Canadian 64 Monza Parts car



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Re: I have a problem I can not solve. confused smiley
Posted by: Richard ()
Date: March 17, 2017 06:29PM

Last week.
>>I have had a miss and suck-back at the exhaust.... Driving at a steady speed it produces a lunging effect. The problem goes away with heavy acceleration at any speed but returns with steady speed or deceleration.<<

Today
>> tube plugged did not effect engine miss.<<

Did the lunging go away?

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Re: I have a problem I can not solve. confused smiley
Posted by: red64vair ()
Date: March 17, 2017 08:36PM

Lunging did not go away.

Larry Blaylock
Saltillo, Mississippi
64 convertible
66 customized Corsa coupe


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Re: I have a problem I can not solve. confused smiley
Posted by: vairygood ()
Date: March 18, 2017 05:29PM

Larry, I don't know if this is your problem but my "miss" was a weak spark I guess, I pulled my coil wire out and the end of the coil was corroded and had rust dust in it, I removed the sleeve in side the coil and cleaned it up and there went my "miss". I'll get another coil.
Buster

Buster Tindel
Gulfport Mississippi
63 vert

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Re: I have a problem I can not solve. confused smiley
Posted by: Ratt643 ()
Date: March 18, 2017 07:28PM

2. Replaced all components of ignition system.

Are you running points or electronic ignition? Its possible the point plate could be worn, do you have an electrical connection between the pivot place and the base? Do you have a ground between the engine and the rear frame?


1964 Monza Coupe

Maryville, TN
U.S. 129 The"Tail Of The Dragon"

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Re: I have a problem I can not solve. confused smiley
Posted by: red64vair ()
Date: March 18, 2017 08:26PM

Buster
The coil I am running is new but I will inspect it.

Richard
I am running points. Grounds are good.

Larry Blaylock
Saltillo, Mississippi
64 convertible
66 customized Corsa coupe


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Re: I have a problem I can not solve. confused smiley
Posted by: Brizo ()
Date: March 19, 2017 05:07PM

Red64vair, I don't have any magic answer or encouragement for you except to re-check everything and let someone else test drive it for their opinion. Every time I've had a strange or elusive problem like yours, the cause usually turns out to be something that I was "absolutely sure" was OK - but it wasn't. Or a symptom was misinterpreted.

Dan Brizendine,
'64 8door Greenbrier 140 PG. "In beautiful Wanamaker Indiana...with one stop light and 5 pizza shops"

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Re: I have a problem I can not solve. confused smiley
Posted by: Ratt643 ()
Date: March 20, 2017 07:09AM

Wow Larry, this is baffling... It could be a vacuum leak. Does the surge go away while you are acclerating and come.back at cruise? If the carburetors ran fine on the.engine before, I would rule that out unless they sit with gas in them for the duration of the engine rebuild, then the carbs may need to be rebiult.


1964 Monza Coupe

Maryville, TN
U.S. 129 The"Tail Of The Dragon"

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Re: I have a problem I can not solve. confused smiley
Posted by: red64vair ()
Date: March 20, 2017 09:15AM

The missing/surging or whatever does go away on acceleration and returns at a steady cruise. There is no vacuum leak.

Larry Blaylock
Saltillo, Mississippi
64 convertible
66 customized Corsa coupe


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Re: I have a problem I can not solve. confused smiley
Posted by: Ratt643 ()
Date: March 26, 2017 09:24AM

Any updates, Larry?


1964 Monza Coupe

Maryville, TN
U.S. 129 The"Tail Of The Dragon"

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Re: I have a problem I can not solve. confused smiley
Posted by: red64vair ()
Date: March 26, 2017 03:16PM

Richard

The only thing I have done is take the car to a retired mechanic that worked on Corvairs at a dealership when they were in production. He said he always got the Corvairs because others did not want to work on them. He is considered to be one of the best old school mechanics around here. Considering all the things I have done, he said if the carburetors are balanced then there is a vacuum leak or a internal problem with the carburetors. Before talking to him I had already tried two sets of rebuilt carburetors and thoroughly checked for a vacuum leak with no improvement. At this point I am so confused I don't know whether to scratch my head or wind my watch. Maybe I should have come to your Frozen Tuna.

Larry Blaylock
Saltillo, Mississippi
64 convertible
66 customized Corsa coupe


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Re: I have a problem I can not solve. confused smiley
Posted by: Ratt643 ()
Date: March 26, 2017 06:23PM

Wish you could have made it, we had plenty of Corvair guys here during the Tuna. I have some other ideas but we need to talk over the phone. Give me a call when you can.



red64vair Wrote:
-------------------------------------------------------
> Richard
>
> The only thing I have done is take the car to a
> retired mechanic that worked on Corvairs at a
> dealership when they were in production. He said
> he always got the Corvairs because others did not
> want to work on them. He is considered to be one
> of the best old school mechanics around here.
> Considering all the things I have done, he said if
> the carburetors are balanced then there is a
> vacuum leak or a internal problem with the
> carburetors. Before talking to him I had already
> tried two sets of rebuilt carburetors and
> thoroughly checked for a vacuum leak with no
> improvement. At this point I am so confused I
> don't know whether to scratch my head or wind my
> watch. Maybe I should have come to your Frozen
> Tuna.


1964 Monza Coupe

Maryville, TN
U.S. 129 The"Tail Of The Dragon"

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Re: I have a problem I can not solve. confused smiley
Date: March 26, 2017 07:06PM

Agree with your well experienced Corvair mechanic:
I'd suggest that you swap a set of carburetors from a known great running car on to yours, and also put your carburetors on the known car for additional comparison.
While doing so, fully examine the gaskets and heat isolator at the base of the carburetors. A vacuum leak there is sometimes tough to find.


Dan Davis - Pierce County, WA ~ CORSA Western Director + Corvairs NW + North Cascades Corvairs + Corvanatics
1966 Corsa Turbo coupe ~ ~ 1966 140 Corsa ~ 65 Monza 140/4 'Vert Sierra Tan/Fawn (my current driver!!)
~ 1964 Monza 'Vert ~ 65 Monza 140/4 Evening Orchid w/ ivory/black int ~ 1962 Monza Wagon 102/4
1963 Rampside/Scamper ~ 1963 Red/Greenbrier ~ 1969 Ultra Van #468

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Re: I have a problem I can not solve. confused smiley
Posted by: Chilly Willy ()
Date: March 26, 2017 07:55PM

I'd also look at the mechanical advance. I'd be concerned with no change with the vacuum advance disconnected.maybe swap the distributor from your 140?



Will
Northern California

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