Fuel starvation issue?

[crash89]

Mine stalled when at WOT....
Later on did nothing at all.

View attachment 607991

That’s about what I expect to see when my new one comes in.

 

[Kern Dog]

Maybe someone can measure one to establish what a normal one is ?

 

[crash89]

Maybe someone can measure one to establish what a normal one is ?

I will be doing before and after measurements. I’ll post them up. I am curious to see how worn out mine is. I also need to record it in case I need to troubleshoot later.

 

[Ranger16]

WOW! Now that is a scary sight! A worn pump rod like that would make me start wondering about lubrication.

 

[Wietse]

A new rod standard size is 3.220".

See link below for my thread with the issues I had and found with my car, plenty info from a lot of people etc.

https://www.forbbodiesonly.com/moparforum/threads/new-mechanical-fuel-pump-not-working.136537/

 

[Wietse]

WOW! Now that is a scary sight! A worn pump rod like that would make me start wondering about lubrication

No worries, the camshaft is good, so are all tappets.
Even de camshaft lobe for the pump rod is not damaged, last time i checked some marks were there but should survive.
If lubrication was that bad due to oil quality or so everything would have run to the ground already.
Most likely a cheap repo, i installed a NOS rod.

 

[crash89]

Looks like I found a culprit. The old one measures in at 3.024”. A little short. Story of my life. LOL

 

[Kern Dog]

That is almost a quarter inch short.

 

[crash89]

That is almost a quarter inch short.

Yup. New one will be in tomorrow. Thankfully, this one just popped out when I pulled the plug out. I was reading about some of them mushrooming.

 

[Kern Dog]

It sure is great to figure out a problem.
Score !

 

[Wietse]

Mine measured 2.967" when i removed it.
For sure that push rod caused issues!

What new rod did you buy?
I got the Howard push rod recommended (Part number 92152) but best (they say) is NOS as they are properly hardened and survive longest.

 

[crash89]

Mine measured 2.967" when i removed it.
For sure that push rod caused issues!

What new rod did you buy?
I got the Howard push rod recommended (Part number 92152) but best (they say) is NOS as they are properly hardened and survive longest.

I got the Comp Cams one from Summit.
https://www.summitracing.com/parts/CCA-4626

 

[Wietse]

I took a measurement prior to installing of the length, note it down and drive the car for 50-100 miles and check again.
If it has worn again a quite substantial amount there is either more damage, or the push rod is not hard enough.
Keep checking Ebay or so for a NOS push rod, good to have in stock

Edit: I've said this before, just replace it on a yearly basis if wear is found, can't go wrong for $20-25.

 

[Kern Dog]

I have never had one go bad, I must be lucky.

 

[crash89]

I likely will get a spare. Kinda like a ballast resistor when they go, they go.

 

[69a100]

Hey, Your welcome for the insight! Glad you figured it out!

 

[crash89]

It was definitely the rod. Installed the new one. Ops check good. Big difference in lengths. Thanks for the advice!

 

[coloradodave]

Hey, Your welcome for the insight! Glad you figured it out!

Yes, but first he would have to thank wagonman in post #2, then Kern Dog in post #5 before he thanked you in post #10. Sorry, but you were a little late to the party with your suggestion.
Gee, I hope you don't think that I'm picking on you. That would be unbearable...

 

[69a100]

Sorry, but you were a little late to the party with your suggestion.
Gee, I hope you don't think that I'm picking on you. That would be unbearable...

Now why the hell would you want to do that?

 

[Korican]

That’s what stumped me.. I had 6psi at the carb when cold. Zero and starved out while coming up the hill to my house. All the checks I have done have shown normal when on level ground at no load.

Same for me (starts at 5 psi then drops as engine is hot to close to 0 on the gauge) but thought from something I read that the liquid filled fuel pressure gauges will not show accurate pressure as temperatures change.