Fuel System?

Hi,

Could you record it cranking and upload it for me to hear?

Joe

You want to hear it again?

Hi,

No, I found it back on page 1. Are you sure the compression is good? It is really cranking fast.

https://www.2carpros.com/articles/how-to-test-engine-compression

Let me know.

Joe

I'll double check the compression.

It didn't start cranking like that until after I changed out the starter.

Oddly enough.

Is a gauge absolutely necessary? Do I need to know the exact PSI or am I just making sure there's compression?

Hi,

A gauge would help. Compression can be low enough to prevent it from starting, but enough to blow your thumb off the spark plug hole.

If you don't have one, oftentimes a parts store will lend one to you.

Let me know.

Joe

See pic below.

Ah, that makes sense. Will touch base when I'm able to do the test. Thanks again for all your help.

So, yeah, compression is s***. 100psi max, average was less than 90. Great times.

Okay. That is a little lower than what we want. But, I want you to do a wet compression test. Before installing the gauge, add about 1 tablespoon of motor oil to the cylinder and then recheck the compression. See if it increases.

Let me know.

Joe

Okay, so I feel like I should start a new thread. lol
After re-reading the testing instructions, I retested the compression, and the results are as follows.

#1=160psi #2=140psi
#3=160psi #4=110psi (120 after adding oil to cylinder)
#5=150psi #6=160psi
#7=150psi #8=150psi

Hi,

Are those the readings after adding the oil? If so, I suspect the compression rings are worn. Did you try starting it after this test when the compression was higher?

Let me know.

Joe

Well, the first round of testing was the result of me forgetting the instructions say to crank for 10 seconds. Shame on me. The only cylinder I added oil to was #4.

No new efforts to start the pickup.

hello joe, it has been some time. I don't like to pop in out of the blue like this, but I have been meaning to ask this for a while. Since i am now running a mechanical fuel pump, do i need to adjust the fuel intake? if i let her run for a min, i can smell the gas is pretty strong and if i put her in gear and try to move, she gets very sluggish. I appreciate your time. Thanks, Greg

Hi Greg,

No problem whatsoever. I'm glad you're back. I need you to help me remember everything. LOL We have a mechanical pump with fuel injection?

If anything, I would think that would lower pressure. However, based on what you described; it sounds like the pressure is too high. Do you have fuel injection or a carb on this?

Again, sorry. I went back through the posts and just don't remember how it was resolved. I see indications of both. LOL If you have a carb, you may have a needle and seat that are leaking or the float itself may need set.

Let me know.

Joe

Sorry for any confusion, I probably should have started a new post.
I don't know why I said mechanical. We removed the mechanical and put an inline electric fuel pump in because the mechanical wouldn't pump any fuel. She is carbureted and we got her started by rotating the distributor 180 degrees.

Hi,

Now I remember. LOL No need to start a new post. This is all related. As far as the issue, it sounds like the pump is producing more pressure than the needle and seat can stop from entering the carb. Do you know what the pump was designed to produce? These carbs are designed to work with low pressure. It would be somewhere between 5 and 10 PSI.

Joe

Good morning Joe,

I believe it's 3-6 PSI. Do you think if I were to relocate it closer to the engine instead of the gas tank it would make any difference?
Greg

Hi,

It really won't matter where the pump is located. Have you checked to see how much pressure the pump is producing?

Joe

Merry Friday Joe,

Okay, I didn't think it would, just thought I'd ask. I don't know what the actual pressure is, but I double checked the rating of 3-6 PSI.

Greg

Happy Friday to you as well.

As far as the pressure, 3-6 psi should be okay. That leaves either the float is set too high, or the needle and seat is worn. Either of these two things would have to be minimal/slightly out of adjustment or worn since the issue is at idle.

Have you had the carb apart for inspection?

Joe

Hi Joe, hope you're having nothing less than an awesome weekend.

No sir, I haven't. Would this also account for her refusal to be driven?

What happens when you try driving it? if it is getting too much fuel, certainly it won't run properly.

Let me know.

Joe

She stutters moving but shuts off when I let off the gas. She does fire right back up though.

Do you ever notice any dark gray or black smoke from the exhaust? Does it smell like it is running rich?

Joe

Haven't noticed any smoke. The only time she starts to smells rich is when I just crank her and let her run.
G
BTW, where are yall out of?

Hi,

I'm near Pittsburgh. As far as the rich smell when it idles, I would have to say checking the carb, float, needle and seat, and simply making sure there is nothing causing anything to hang up or allow too much fuel to enter the float bowl.

That is where I would have to start.

Joe

Ah, okay. Just curious how close you were. I know that hands on makes a big difference when trying to troubleshoot.
I will give the carb a thrice over and see what i can see.

Greg

Greg,

You are right. Not being there makes things a bit more of a challenge. Let me know how things turn out for you. If I can help, let me know. I'll be here.

Take care of yourself.

Joe

Merry hump day, Joe. Hope life is treating you well. I finally worked on my carburetor, and she may be out of the flood zone. However, when I put her in gear, she gets upset. Runs very rough.

Thanks for all your help.
Greg

Hi,

If I was of any help, you are very welcome. Is the idle still an issue?

Let me know.

Joe

Hello, you have always been extremely helpful, and I am beyond grateful. I apologize if I made it seem otherwise.

I removed the carburetor, checked the float, replaced the needle and gaskets, and cleaned everything. Not necessarily in that order.

Just sitting, she seems ok. I should probably let her sit at idle a bit longer to make sure that issue has been rectified. When I put her in gear, she starts to shake for lack of a better term.

Totally Clueless,
Greg

Hi,

You never made me feel that way. However, you did all the work. LOL As far as the shaking, is the choke fully opening when the engine is warm?

Joe