fuel pump

[jnrmcd]

Question for the experts, just replaced the fuel pump on my 75 midget and still no fuel. I have tried to run out of gas can to pump to carb and gives just a drizzle not enough to keep running. My only thought is the cam lobe that the pump runs off is worn. First question is this possible? If so should I use an electric fuel pump and if so what one? Thanks in advance.

 

[Bugeye58]

It's <u>possible</u> that the cam lobe is worn, but first I'd make sure you have the right pump. There is a long arm, and a short arm pump. The long arm requires a spacer between it and the block. If you install the short arm pump using the spacer, the actuating lever of the pump won't contact the cam.
Was the pump change to correct a "no run" problem?
Have you tried manually working the pump while off the car? There have been some shaky aftermarket pumps floating around lately.
Did you notice any metal in the oil the last time you changed it? For the cam lobe to wear to the point of uselessness, the oil should have looked like metallic paint.
In the event you switch to an electric pump, get one that puts out no more than 3 PSI.
Hope this has helped.
We'll get it figured out.
Jeff

 

[Billm]

There are two options for fuel pumps for those models, one for use with a spacer and one for no spacer. Do you have the correct pump/spacer combination?
Bill

 

[Bugeye58]

Great minds, eh Bill? /bcforum/images/%%GRAEMLIN_URL%%/grin.gif
Jeff

 

[Billm]

Yes- but you explaned WAY better!
Bill

 

[jnrmcd]

The original pump had no spacer and the replacement I ordered from moss was the no spacer type, they appear to have the same arm length, and they both will work by hand. They will shoot gas across the garage when you pump by hand.

 

[Bugeye58]

Well, I guess it sounds like a cam, then.
Jeff

 

[jnrmcd]

There was no metal in the oil last change.

 

[Bugeye58]

Can you look in the fuel pump hole with a mirror and visually inspect the cam lobe? Or better yet, a borescope.
Jeff

 

[jlaird]

Feel it with your finger.