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Re: Misfire above 1/4 throttle
Posted by: joelsplace ()
Date: January 30, 2019 09:40PM

I only had about 30 minutes to work on it today. I ran it with the lights out and doors closed and didn't see any stray sparks.
Took the top off of the RH carb and blew things out. The venture cluster had been buffed or polished and they had smeared the metal over the tips so they weren't completely open. I fixed that and filed it flat. It was really warped. Checked both fuel stones and blew them out. I didn't really expect this to fix it and it didn't but I drove it about 70 miles and got more information.
Coil is not mounted to engine so it shouldn't get too hot.
Hot soak does make it run significantly worse.
At one point turning the headlights on made it run worse. **I think I'm getting somewhere with this. Lights are bright so I don't think it's a charging issue. I will check the voltage. I'm thinking as suggested that maybe the resistor wire or the coil.
Hopefully I'll have more time tomorrow.

Joel
Northlake, TX
4 Ultravans, Lost count at 100 Corvairs...

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Re: Misfire above 1/4 throttle
Posted by: ac1948 ()
Date: January 31, 2019 03:34AM

X2 on Vairchet's post. I had to bypass the resistor wire and go to the external one.

Jerry Murray
Charleston, SC

63 Rampside, PG,110

63 Greenbrier, PG, 110

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Re: Misfire above 1/4 throttle
Posted by: Lane66m ()
Date: January 31, 2019 03:46AM

If you haven't changed the coil, now is the time to do it. Get a known good one off a running engine and try it.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


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Re: Misfire above 1/4 throttle
Posted by: joelsplace ()
Date: January 31, 2019 01:27PM

Swapped coils with a known good one and it runs 90% better. Still has a misfire at 70mph and the tach still acts crazy but not as much. It will run all the way up to full throttle now.
I'm not sure it was the coil though. When I swapped them I discovered the capacitor on the coil was connected to the negative terminal and the body of the capacitor wasn't positively grounded. It was taped to the coil with electrical tape. I'll try the old coil on the other car and see what it does.
Thanks!

Joel
Northlake, TX
4 Ultravans, Lost count at 100 Corvairs...

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Re: Misfire above 1/4 throttle
Posted by: jjohnsonjo ()
Date: January 31, 2019 02:00PM

Don't overlook the black wire that goes from the points to ground.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa

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Re: Misfire above 1/4 throttle
Posted by: Frank DuVal ()
Date: January 31, 2019 08:59PM

Quote
J.O.
Don't overlook the black wire that goes from the points to ground

I hope you left off the last part of your sentence: from the points to the ground (negative) terminal of the coil.

Also the grounding of the points through the point plate to the distributor body is important, and the pivot wears out, causing intermittent loss of ignition.

You can make a new pivot (repair the points plate) with a short length of 1/4" steel fuel line, center drill to fit the pivot pin OD. Solder or braze this to the point plate. Reassemble.

Frank DuVal

Fredericksburg, VA

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Re: Misfire above 1/4 throttle
Posted by: joelsplace ()
Date: January 31, 2019 09:13PM

Points belong in the glove box.

Joel
Northlake, TX
4 Ultravans, Lost count at 100 Corvairs...

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Re: Misfire above 1/4 throttle
Posted by: vairmech ()
Date: February 01, 2019 06:11AM

So, Are you using the Pertronics replacement?

If so go back to your points and see if your problem goes away.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Misfire above 1/4 throttle
Posted by: joelsplace ()
Date: February 01, 2019 06:23AM

I do need to try that.

Joel
Northlake, TX
4 Ultravans, Lost count at 100 Corvairs...

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Re: Misfire above 1/4 throttle
Posted by: Lane66m ()
Date: February 01, 2019 06:47AM

At least you have seen progress in your actions. But yes, try a points plate system next.

Which Pertronics do you have in the distributor? I would like to assume it is Pertonics I for the PG transmission. Not that PII would have an effect at high rpms that I have been made aware of to date.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


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Re: Misfire above 1/4 throttle
Posted by: joelsplace ()
Date: February 01, 2019 06:48AM

Yes, it's a black one.

Joel
Northlake, TX
4 Ultravans, Lost count at 100 Corvairs...

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Re: Misfire above 1/4 throttle
Posted by: curt ()
Date: February 01, 2019 08:29AM

I have a LM with PG.I am under the impression Points in Power Glides run better than the modern tec electroinics.

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Re: Misfire above 1/4 throttle
Posted by: Lane66m ()
Date: February 01, 2019 09:00AM

Unless you have got Seth'electronic HEI distributor. I have one for my 140 engine, when I get to that project. It will replace the Mouse House 110 engine in a couple of years.

Pertronix II doesn't play well wth PG vehicles. Pertronics I that is a matter of preference.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


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Re: Misfire above 1/4 throttle
Posted by: vairmech ()
Date: February 01, 2019 01:48PM

I have stated many times that the Pertronics does not hard fail! When it goes bad it will give you symptoms of running out of fuel at high speed, hard starting, a misfire issue, and start and run fine but will not rev over X rpm.

I have diagnosed all of those failures on Pertronics, I even had to change out one on a PG a customer had put on and the thing would not idle in gear and it was a 1.

Had you given any clue in the first post the points plate would have been my first suggestion!

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Misfire above 1/4 throttle
Posted by: joelsplace ()
Date: February 01, 2019 03:01PM

Ken,
I'm not sure what you mean by this "Had you given any clue in the first post the points plate would have been my first suggestion!"
I did mention it has a Pertronix 1 in it. Am I missing something?

Joel
Northlake, TX
4 Ultravans, Lost count at 100 Corvairs...

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Re: Misfire above 1/4 throttle
Posted by: Wagon Master ()
Date: February 01, 2019 03:40PM

joelsplace Wrote:
-------------------------------------------------------

> It has a Pertronix 1 and it ran the same with
> points.


From the original post.

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Re: Misfire above 1/4 throttle
Posted by: Seth Emerson ()
Date: February 01, 2019 04:10PM

If you do try points, you will be swapping out the point plate as well, so it is worth making sure the points plate is in good condition, as well as the points, before you swap it in. Since the points cam has not been in use, be sure to clean it off after removing the Ignitor ring. Since you will have them off, make sure the cap and rotor are clean and in good shape. At least you know, since the coil replacement helped, that it is likely a related ignition issue. Not 100%, but likely.

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Re: Misfire above 1/4 throttle
Posted by: 7004doorL ()
Date: February 01, 2019 04:59PM

Just a suggestion. Try a different Coil Wire only and see if problem persists.
The Wire from the Coil to the center of the Distributor Cap.

Mike

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Re: Misfire above 1/4 throttle
Posted by: joelsplace ()
Date: February 01, 2019 06:57PM

Good suggestions. The cap and rotor look fairly new. I measured the resistance on the coil wire and it seems ok but I'll try a different one to make sure. I think I still have a couple of sets of your wires in stock Seth so maybe I'll just swap the whole set.
I'm thinking it might be a good idea to unhook the tach wire and see if that helps.
It probably won't happen for a few days. The emergency brake cable broke and I didn't have one so I ordered it from Clark's yesterday. The fresh air cable is broken so I'm replacing that at the same time and one of the differential seals was leaking so I'm replacing that and greasing the wheel bearings. I need to add a thermistor and wire as well as a vacuum line... while I'm at it...
The fuel gauge died so I need to look at that too and fix a fuel leak around the tank.

Joel
Northlake, TX
4 Ultravans, Lost count at 100 Corvairs...

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Re: Misfire above 1/4 throttle
Posted by: JohnVan ()
Date: February 01, 2019 08:28PM

joelsplace Wrote:
-------------------------------------------------------
> Good suggestions. The cap and rotor look fairly
> new. I measured the resistance on the coil wire
> and it seems ok but I'll try a different one to
> make sure. I think I still have a couple of sets
> of your wires in stock Seth so maybe I'll just
> swap the whole set.
> I'm thinking it might be a good idea to unhook the
> tach wire and see if that helps.
> It probably won't happen for a few days. The
> emergency brake cable broke and I didn't have one
> so I ordered it from Clark's yesterday. The fresh
> air cable is broken so I'm replacing that at the
> same time and one of the differential seals was
> leaking so I'm replacing that and greasing the
> wheel bearings. I need to add a thermistor and
> wire as well as a vacuum line... while I'm at
> it...
> The fuel gauge died so I need to look at that too
> and fix a fuel leak around the tank.

Joel,

Your car sounds like mine smiling smiley. Always 5 more things to do for everything I fix.
John

John Van Valkenburgh
Knightdale NC
'65 Corsa 140

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