My latest hot start issue

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May 21, 2011 | 07:20 PM

johnt365

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Drifting

Joined: Dec 2004

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From: Austin Texas

My latest hot start issue

So I have resolved all of my hot start starter issues. Now I am addressing fuel issues.

I insulated the fuel lines to the pump and this helped get fuel to the carb. I drove the car today and got it hot. stopped for about 5 minutes and it would turn over but not start. Removed air cleaner and verified that fuel was squirting out when the accelerator pump was hit. However, even 5 or 10 shots would not start it. If I hit it with starter fluid it would cough and sputter and start though.

I have alum. heads and performer intake. Could it be that the intake is getting so hot that the fuel flashes off or something?

I bought a heat shield for the carb but dont think that will help since I have fuel in the bowl. Do I need an air gap manifold or an oil cooler perhaps?

A speed shop guy told me that the "winter blend of gas" has a lower boiling point and I need to wait for summer blend higher boiling point gas. IDK WTF to think.

May 21, 2011 | 08:01 PM

DustersVette

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From: Fort Thomas Kentucky

I don't know if this is an issue with your car or not, but with my 71, the starter gets hot, and must cool down before I can start it.

May 21, 2011 | 08:07 PM

SanDiegoPaul

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From: San Diego - Deep Within The State of CONFUSION!

Quote:

Originally Posted by DustersVette

I don't know if this is an issue with your car or not, but with my 71, the starter gets hot, and must cool down before I can start it.

he said the motor would turn over just fine, though. your problem is different- yours needs a starter.

May 21, 2011 | 08:07 PM

johnt365

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Drifting

Joined: Dec 2004

Posts: 1,714

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From: Austin Texas

I did have that issue in the past. Coated headers, new 1000 amp battery, starter shield AND a flex fan resolved it.

It appears the speed shop guys were right. I bet this is my issue http://www.eps-hane.com/techtips5.html

Last edited by johnt365; May 21, 2011 at 09:07 PM.

May 22, 2011 | 01:50 PM

johnt365

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Drifting

Joined: Dec 2004

Posts: 1,714

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From: Austin Texas

Well, knock on wood, but I think the gas was part of the issue. I went to a station that is on an interstate and got the 87 grade in hopes it would be freshest "summer gas". Drove around and then parked and even 10 min and 15 min later it starts.

I doubt gas was my only issue or it seems like all of us with carbs would have this issue. However, I must be on the cusp or something and the higher boiling point gas helps.

Cheers!

May 22, 2011 | 04:08 PM

69Vett

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From: Austin Texas

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Install a thermal insulator between the carb. and intake,
about 1/4" thick composite, it will greatly reduce the carb. temp.
which will eliminate fuel boiling in the carb.

May 22, 2011 | 04:23 PM

pippo350

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Joined: Dec 2009

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From: South Italy

When you install a carburetor spacer be carefully for the gap from top of airl filter and your hood.

I have installed yesterday a spacer it hink it will elp with your vapor lock

May 22, 2011 | 09:16 PM

DRIVESHAFT

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Joined: Aug 2005

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From: League City TX

Quote:

Originally Posted by 69Vett

Install a thermal insulator between the carb. and intake,
about 1/4" thick composite, it will greatly reduce the carb. temp.
which will eliminate fuel boiling in the carb.

It helped on mine.