Starting issue

[cdn_squareback]

1971 squareback with a fresh 1776 twin carb rebuild.
pertornix svda 186504
flamethrower 1 coil
new napa battery, fresh gen rebuild
28 deg adv at 3000rpm


having an issue at hot start. went on our first road trip 250 km to a vw show near Montreal, drove for about 2 hours, stopped for fuel, no issue

drove another half hour, 45 min to a Porsche collector and the car wouldn't start after sitting for 20 min. cranks slow, almost like a dead battery.

bump start the car, drove another 20 km to the show, parked for 3-4 hours. starts fine

drove home, straight drive no stops, got home, tried to re start the car as soon as i parked, same issue cranks slow as if the battery is dead, no start.

waited 45 min, started fine. i haven't touched the starter yet, i cleaned all connections when i having charging issues a month ago.

anyone have this issue before i drop $300 cdn on a new gear reduction starter?

thanks

[old_man]

What's the condition/age of the battery? I think starting a motor hot is more taxing than starting a motor cold. I've had a car that could start cold but not hot be remedied by a new battery. You could always try a booster pack/jump start the next time it happens....costs nothing.

Hopefully it's not something more serious like the engine being too tight or what have you.

Where in Canada are you? I have a working starter you could borrow.

[cdn_squareback]

battery is new, about 2 months old

[gt1953]

Check the charging of the battery with engine running. Check voltage before and after running.
_________________
Volkswagen: We tune what we drive.
Numbers Matching VW's are getting harder to find. Source out the most Stock vehicle and keep that way. You will be glad you did.

72 type 1
72 Squareback
({59 Euro bug, 62, 63, 67, 68, 69, 73 type ones 68 & 69 type two, 68 Ghia all sold})

[cdn_squareback]

running, its bounces anywhere for 13.4 to 14.2, when i try and start it after it being hot, my volt gauge is reading 12.4 to 12.6 car on, engine off. oil temp around 200

[old_man]

What kind of starter do you have in there? The self supporting kind or the one that needs a bushing? What's the condition of the bushing. Searching on these forums has led to a thread or two about it causing problems when hot.

The only other thing I can think of that you could try, besides cleaning all electrical connections and ground, is to put voltage directly to the solenoid.

Or you may just need rebuilt starter. Do you know the history of your starter?

Generic remanufactered self supporting starter at Napa Canada is about $120, $95 for the bushing kind. Less if you do the RockAuto thing.

[Bobnotch]

Sounds like it's vapor locking at the fuel pump. Mine did that before I replaced the mechanical pump with an electric one. The lay up time is almost right on the money for a cool down of the pump.
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Bob 65 Notch S with Sunroof
71 Notch ...aka Krunchy; build pics here;
http://www.thesamba.com/vw/forum/viewtopic.php?t=249390 -been busy working
64 T-34 Ghia...aka Wolfie, under construction... http://www.thesamba.com/vw/forum/viewtopic.php?t=412120

[Tram]

[cdn_squareback]

bought the car 4 years ago, never touched the starter.

[cdn_squareback]

Electric fuel pump mounted on the front beam

[cdn_squareback]

update

went for a half hour drive today, got up to about 165 deg and started as soon as i parked, spun nice and fast.

seems the issue is when the temp is close to the 200 mark

[Erik G]

Tram may be right. Those pertronics svda's are junk. They don't advance right, so if you are timed at high rpm, they are pretty high at idle.

The wires, the rubber grommet, the vacuum linkage all need to be worked on so if it's straight out of the box, that's part of the issue.

Yes, definetly the self supporting starter is a good upgrade
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[cdn_squareback]

the wires and grommet have already been fixed as i had to replace the pick up due to wires not being properly placed at the factory. i have not touched the linkage yet. what should i look for?

i have been questioning if i'm pulling enough vacuum from both the 34ict. i have a vacuum line running from each base to a T then to the dizzy. i was actually thinking of tapping into the balance tube.

[Erik G]

some just need better greasing but I had to pull it off and use a bosch one once, nothing would make the vacuum right
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[Intrinsic]

You could try insulating the starter with an insulating wrap. These are quite inexpensive and will help to ascertain if your starter is being overheated by the engine cooling air discharge.