[Roadsters] OT; Corvair questions

[Paul]

  Sorry but I lost Jim's email.  Below is an answer for his Corvair
problems.

 

Paul

 

From: walt matenkosky [mailto:wmatenkosky at hotmail.com] 
Sent: Saturday, March 20, 2010 6:51 PM
To: Paul Kort
Subject: RE: Corvair questions

 

 
Jim:
As we say on the Datsun 510 list, "If you think its electrical, its fuel,
and if you think its fuel, its electrical"
I believe you have a fuel problem, strangely similar to one I have had. The
running symptoms suggest that it is running lean before it quits. My '62
Greenbrier did the same thing. It always ran fine at low speed as when
running around in town, and it would be fine for a few minutes at highway
speed, then it would lose power, misfire and quit. However, Let it sit a
while and it would be OK as before..
You could have a bad fuel pump diaphram, as they don't hold up well to
todays fuel. If you haven't changed it, get one from Cal Clark.
There is a short piece of rubber hose connecting the body hard line to the
engine. If that hose has grown old and cracked, or if the clamps are loose,
it could be drawing in air. If you pull air into the line you will have foam
in the carbs. At low speed it doesn't matter, but at sustained high speed
you will run lean, lose power and backfire, then stall.
My problem, after doing the previous steps, turned out to be the original
hose which connects the body hard line to the fuel pickup in the tank. It
was leaking air into the fuel line, causing the symptoms noted above.
Oh, I also swapped coils, points etc. and it made no difference.
Good luck
Walt in WPA
'62 Greenbrier Deluxe
'71 Datsun 510
 

> 
> -----Original Message-----
> From: datsun-roadsters-bounces at autox.team.net
> [mailto:datsun-roadsters-bounces at autox.team.net] On Behalf Of Jim Gammon
> Sent: Saturday, March 20, 2010 4:03 PM
> To: Datsun roadster
> Subject: [Roadsters] Intermittent firing
> 
> I also have a 64 110 hp Corvair coupe, well, it is my wife's, but I have
to
> fix it.
> 
> It runs great, for about 5 miles, then starts bucking and kicking, and
dies.
> I
> put on rebuilt carbs, did a full tune up, points, plugs, wires, condenser,
> air
> filter, etc., etc. 
> 
> No friggin difference. I just had to get towed home. Cost me $100, and I
am
> stymied.
> 
> Waited 2 hours, starts right up.
> 
> Any chance it is the coil? Any ideas? I think I replaced everything else,
> except rhe distributor itself, but....
> 
> JimG NJ 69 2K