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Fuel System?

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,217 POSTS
Hi,

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

Joe
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Saturday, June 3rd, 2023 AT 10:30 PM
Tiny
GCROW
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  • 47 POSTS
You want to hear it again?
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Sunday, June 4th, 2023 AT 9:33 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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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
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Sunday, June 4th, 2023 AT 9:26 PM
Tiny
GCROW
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I'll double check the compression.

It didn't start cranking like that until after I changed out the starter.
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Monday, June 5th, 2023 AT 8:03 AM
Tiny
GCROW
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Oddly enough.
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Monday, June 5th, 2023 AT 10:15 AM
Tiny
GCROW
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Is a gauge absolutely necessary? Do I need to know the exact PSI or am I just making sure there's compression?
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Monday, June 5th, 2023 AT 3:27 PM
Tiny
JACOBANDNICKOLAS
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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.
Image (Click to make bigger)
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Monday, June 5th, 2023 AT 8:10 PM
Tiny
GCROW
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Ah, that makes sense. Will touch base when I'm able to do the test. Thanks again for all your help.
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Tuesday, June 6th, 2023 AT 6:50 AM
Tiny
GCROW
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So, yeah, compression is s***. 100psi max, average was less than 90. Great times.
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Tuesday, June 13th, 2023 AT 5:34 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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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
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Tuesday, June 13th, 2023 AT 7:59 PM
Tiny
GCROW
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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
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Wednesday, June 14th, 2023 AT 10:42 AM
Tiny
JACOBANDNICKOLAS
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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
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Wednesday, June 14th, 2023 AT 10:24 PM
Tiny
GCROW
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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.
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Thursday, June 15th, 2023 AT 8:45 AM

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