Missing fuel pressure when engine gets hot.

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Apr 20, 2007 | 11:34 AM

#21

karstenhorn

Thread Starter

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Joined: Jan 2007

Posts: 67

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From: Sindal Jutland

Problem solved

Just a quick round up, a new fuel pump solved my initial rough running problem. I got a Carter stock look-alike pump with return line. However my fuel pressure is still dropping a lot when the engine gets very hot. My fuel pressure gauge is behaving kind of strange (inconsistent reading when connected to free air) so a new pressure gauge is underway now.

Thanks for all the good suggestions – the pump seems to be the culprit.

Regards
Kasten Horn

Apr 20, 2007 | 12:30 PM

#22

Bangkok Dean

Le Mans Master

Joined: Jan 2004

Posts: 8,295

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From: one night in Bangkok you are never lonely

One more thing I did was wrap all the lines with a insulation to keep the lines as cool as possable.

Apr 20, 2007 | 05:31 PM

#23

Mike Ward

Race Director

Joined: Jul 2001

Posts: 15,892

Likes: 42

Quote:

Originally Posted by ttaylor800

I'm in the process of changing up carbs and considering an new fuel pump. Edelbrocks and others have 2 lines vs. 3 (no vapro return). Is there a way to use a high permformance mechanical pump on the C3's with no return?

You already have a high performance pump installed. Why would you want to downgrade to a 2 port pump? Please read all the posts giving good info on why three ports is the way to go.

Apr 20, 2007 | 07:56 PM

#24

vetteaddic

Burning Brakes

Joined: Nov 2004

Posts: 899

Likes: 1

From: Kansas

Quote:

Originally Posted by karstenhorn

I have a cheap oil filled guage from Midwest Motorsports that does the same thing good psi when cold and down to zero hot,it's next to the carb,bought a Autometer fuel psi guage and it does not loose pressure,but the other one still does.

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