7.3L Compression test: questions?????

plgebbia · 2010-07-22 01:08:54

Look here .... (http://en.wikipedia.org/wiki/Leak-down_tester)

Reply Subscribe

Thread Tools

Search this Thread

Jul 22, 2010 | 05:44 PM

#16

Action4478

Hotshot

Joined: Aug 2006

Posts: 10,764

Likes: 39

Look here ....

Jul 22, 2010 | 05:55 PM

#17

plgebbia

Thread Starter

Posting Guru

Joined: Mar 2008

Posts: 1,537

Likes: 0

From: Dongola, IL

Thanks Rick!

Jul 22, 2010 | 05:57 PM

#18

Action4478

Hotshot

Joined: Aug 2006

Posts: 10,764

Likes: 39

You're welcome ...

Jul 22, 2010 | 10:25 PM

#19

craftsmangary

More Turbo

Joined: Jun 2009

Posts: 580

Likes: 58

From: Michigan

Quote:

Originally Posted by superduty4x4

I think with compression less than 300 psi means she's worn out.

X2 300psi +

Jul 23, 2010 | 01:05 PM

#20

plgebbia

Thread Starter

Posting Guru

Joined: Mar 2008

Posts: 1,537

Likes: 0

From: Dongola, IL

Well, I got the VC and other stuff out of my way this morning.

The first thing I noticed was this

There is alot of movement in and out.

I also noticed that there are newer injectors in cylinders #4 #5 and #7.

I am preparing to do the compression test, Is there anything I should know/do first?

Thanks all, I really appreciate it

Jul 23, 2010 | 01:38 PM

#21

MustangMatt96GT

Posting Guru

Joined: Nov 2008

Posts: 1,138

Likes: 0

From: Lakewood, Colorado

its a california truck... it has AB injectors.

Jul 23, 2010 | 01:59 PM

#22

tjbeggs

Post Fiend

Joined: Apr 2004

Posts: 12,835

Likes: 3

From: Silver Lake Dunes, MI

I usually pull the IDM relay and all the GP's so I don't wear out the battery

Jul 23, 2010 | 02:07 PM

#23

427 fordman

Hotshot

Joined: Feb 2009

Posts: 10,408

Likes: 75

From: Plankinton, SD

Wow, that turbo wheel looks baaaaaad

FTE Stories

Ford Trucks for Ford Truck Enthusiasts

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Joe Kucinski

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Brett Foote

Top 10 Ford Truck Tragedies

Joe Kucinski

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

Brett Foote

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Michael S. Palmer

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Verdad Gallardo

10 Best Ford Truck Engines We Miss the Most!

Joe Kucinski

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Brett Foote

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Michael S. Palmer

10 Most Surprising 2026 Ford Truck Features!

Joe Kucinski

Jul 23, 2010 | 03:14 PM

#24

rolsmojave3

Senior User

Joined: Jun 2006

Posts: 183

Likes: 0

From: Wisconsin

Looks like something harder then air went through that 7.3l

Jul 23, 2010 | 06:19 PM

#25

plgebbia

Thread Starter

Posting Guru

Joined: Mar 2008

Posts: 1,537

Likes: 0

From: Dongola, IL

Quote:

Originally Posted by tjbeggs

I usually pull the IDM relay and all the GP's so I don't wear out the battery

Thanks Tim!

Does anyone know where I can buy the glow plug compression adapter pictured earlier in this thread? I bought a kit but it is made for the IDI 7.3L

Jul 23, 2010 | 06:20 PM

#26

plgebbia

Thread Starter

Posting Guru

Joined: Mar 2008

Posts: 1,537

Likes: 0

From: Dongola, IL

Quote:

Originally Posted by MustangMatt96GT

its a california truck... it has AB injectors.

It is a early 99 truck. does that still mean it is a california truck?

Jul 23, 2010 | 07:13 PM

#27

RÖENTGEEP

FOREIGN GURU

Joined: Jul 2006

Posts: 7,655

Likes: 7

From: Celaya, Gto. MX

Quote:

Originally Posted by 427 fordman

Wow, that turbo wheel looks baaaaaad

Quote:

Originally Posted by rolsmojave3

Looks like something harder then air went through that 7.3l

Yeap, and maybe hurt something else and is the culprit of the issue.

Jul 24, 2010 | 08:54 PM

#28

plgebbia

Thread Starter

Posting Guru

Joined: Mar 2008

Posts: 1,537

Likes: 0

From: Dongola, IL

I bought this compression tester, I hope it is a good one.
Mityvac MV5536 Compression Tester - Compression / Press Test
I also bought the glow plug adapter.

Jul 25, 2010 | 01:50 AM

#29

MustangMatt96GT

Posting Guru

Joined: Nov 2008

Posts: 1,138

Likes: 0

From: Lakewood, Colorado

Quote:

Originally Posted by plgebbia

It is a early 99 truck. does that still mean it is a california truck?

nope all early 99s had ABs and all late 99s had ADs

Jul 25, 2010 | 01:10 PM

#30

tjbeggs

Post Fiend

Joined: Apr 2004

Posts: 12,835

Likes: 3

From: Silver Lake Dunes, MI

Quote:

Originally Posted by plgebbia

I bought this compression tester, I hope it is a good one.
Mityvac MV5536 Compression Tester - Compression / Press Test
I also bought the glow plug adapter.

I hope yours works better than mine. The digital guage what all screwy on mine so I put a mechanical gauge on it. The adapters are good though and my gauge might have been a fluke. I did buy it used.

Reply Share

First
Prev
2 / 4
Next
Last

Forum Jump