1988 7.3 compression test|How to perform a Compression Test on a 7.3 Powerstroke : fabrication Record your readings on paper. do not remove the injectors, they test it through the glow plug hole. remove all glow plugs. Best done when engine is warm. If any are low squirt .
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7.3 compression test. I want to check the compression on a 1988 f250 7.3 motor I think I read that you do it through the glow plugs and not the injectors. could someone give .1999 - 2003 7.3L Power Stroke Diesel - glow plugs - Can someone point me in .
1999 to 2016 Super Duty - engine missing and blowby - ran AE did cylinder . You want to do the test with all glow plugs out and test one cylinder at a time. You will need a longer than normal test adapter to clear the . As a Q&D test, try plugging the block heater in for 2-3 hours before starting sometime.
Record your readings on paper. do not remove the injectors, they test it through the glow plug hole. remove all glow plugs. Best done when engine is warm. If any are low squirt . Set the engine #1 piston to TDC on the compression stroke, then see if the gear timing is correct, the gear Y and O marks. In the pic, it's hard to see the Y mark, but it's where .
To perform a compression test on a 7.3 Powerstroke, you’ll need some essential tools: a compression gauge, 3/8 inch drive socket set, and a torque wrench. Start by .
Compression testing the parts truck engine and more progress stripping the truck down. One cylinder down could be a broken ring, whole in piston or worn cylinder. Really no way to tell until the head is off and get an eyeball and measurements. Also be sure to try a . Compression testing drew's 7.3 powerstroke excursionMityvac MV5535: https://www.amazon.com/Mityvac-MV5535-Digital-Diesel-Compression/dp/B000M1F4F8.
In this video, I perform a compression test (and ultimately a leak down test) on a 7.3 I bought off of Craigslist. See what I learned!
Need to use a starter and bump the ckmpression gauge the same number of times per cyl test. 3, 4, or 5 compression strokes is common. I don't know what would be standard to compare numbers globally. You will more be looking for variations cyl to cyl. Lee. The compression test covers a multitude of potential problems - from valve train issues to rings. Other than a cylinder contribution test and buzz test, and maybe monitoring your ICP sensor data and IPR duty cycle - there's not much more to do. . (Not Powerstrokes) 1988-1993. Top Contributors this Month View All. RT 27 Replies. bugman 24 . You need to beg, borrow or steal a compression tester that has a high enough scale to test diesel engines. It will need to go to at least 500 pounds. You need an adapter that will fit in the injector hole for a 6.9 or 7.3, it also fits some other applications. The most accurate readings are with a motor that is warmed up. 1987 - 1996 F150 & Larger F-Series Trucks - 95' 7.3 Compression Test - Ok so I finally got the motor pulled out of the truck and did the compression test using the cheap harbor freight diesel compression tester and a macgyvered 7.3 glow plug fitting.
7.3L IDI Diesels (Not Powerstrokes) 1988-1993. 94 F350 7.3L IDI Turbo Compression Test!! Jump to Latest 14K views . Compression test is one way to test, but IMO not the best way, there is a specific test that involves the use of a manometer. Not having access to that tool, the next best test would be a cylinder leakdown test.
Compression test To perform a compression test on this engine, you need to have a diesel compression gauge and a glow plug adapter. Remove all the glow plugs to check any cylinder. Crank the engine at least five revolutions and the same number of revolutions for each cylinder. It would probably be a good idea to have a battery charger hooked up . Run a compression test and than a leak down test on cylinders that checked low on compression test. That will tell you if valve problems. If you have the head off now pour solvent down into the exhaust port and intakes ports. . (Not Powerstrokes) 1988-1993. Top Contributors this Month View All. RT 23 Replies. bugman 23 Replies. B. bismic 19 .The 6.9 was bored out to 7.3 L in 1987, eliminating it from the engine line-up in 1988. . Compression: 21.5:1: 17.5:1: Aspiration: non-turbo, turbocharged in 1993: Turbocharged: Injection: Stanadyne rotary injection pump, indirect injection: HEUI injection system, high pressure oil pump, direct injection:
7.3 Powerstroke Compression Test Results. Jump to Latest 2K views 7 replies 4 participants last post by Texag1999 Nov 28, 2023. T. Texag1999 Discussion starter 4 posts
Compression testing drew's 7.3 powerstroke excursionMityvac MV5535: https://www.amazon.com/Mityvac-MV5535-Digital-Diesel-Compression/dp/B000M1F4F8
Pre-Power Stroke Diesel (7.3L IDI & 6.9L) - 1988 7.3 won't start, bad injector pump? - I bought another F250, this one a 1988 with a 7.3 and I've not got it started yet. . All the glowplugs test ok. I removed them to make it crank faster. . So I checked the compression and the results were scary! It was 2 - 280 4-280 6-250 8- 0 After reading some scary stories of Compression numbers, I realized I never tested mine. Had 122,000 mi when I got it, has 184,000 mi now. Runs fun but you never know. Anyways, when testing on these motors, all GP's out, is it best to disconnect the main UVCH connector or each injector connector when doing the test. Compression should be 400 plus or minus 10%. Might be lower but you are mainly looking for close to 400 or all cylinders being within 10% of each other. You symptoms list certainly points at a compression issue. The adapter in that picture is what I use with my compression tested but a GP can be adapted as well.
2004 6.0 F-350 Crewcab, mostly stock 1990 F350 with Hypermax turbo and 6.9 rebuild, with E4OD, pretty much stock on everything else 1994 Toyota P/U gasser (22RE) I have a 2002 F350 with a dusted 7.3 motor. She has dangerously low compression in a few cylinders but is still running and driving with minimal if any issues other than poor fuel economy and the occasional hard cold start (and I'm talking cold starts below 0 degrees celcious) I recently stumbled across a fellow who has a 7.3 with 150000km on the . Compression Ratio. The compression ratio of the 7.3 Powerstroke is 17.5:1. 350 PSI is considered optimal in a compression test. The somewhat high compression ratio of the 7.3 Powerstroke allows the engine .
1999 to 2016 Super Duty - 7.3 compression vs cylinder leak down test results - Hello have a 1999 7.3 with 285K. Bought truck wrecked with a missfire on #1. I checked cylinder compression #1 was lowest at 380 psi , all other cylinders between 415-440. I put new injectors,uvch, HPOP,,IPR ,ICP , idm- in truck. Swapped #1. So I had a compression test done. I’m wondering if this is enough loss to be concerned about? The truck rocks at idle so running kinda rough, could the compression issue I have cause it? All input is appreciated! Attachments. 0A6CEC93-04DE-405C-9885-E40D127FC49A.jpeg. 226.3 KB don't know why there so ceap has any one else here of blackwater engines also i did a compression test on cylinders 2,4,6,8 on my motor an got 290,350,210,190 an that was cold.truck misses enought to shake truck when cold an has a slite miss when warm. starts hard on cold days colder it is the worse it misses. has new injectors, glow plugs .
How to perform a Compression Test on a 7.3 Powerstroke
The 7.3L Godzilla engine is a big-block V8 launched by Ford in 2020, as a replacement for the 6.8 Triton V10.The 7.3 engine is offered as an upgrade to the standard 6.2L “Boss” engine.. With multiple engine options in F250 and F350 trucks we’re going to break down everything about the 7.3 Godzilla.
This morning i finally did a compression test and the results arent telling me much. I had 405 on #8,340 on #6 with the rest being 385-395. I shot a little (approx 1/2ts)30 weight oil in #6 and retested and it jumped to 380. . (Not Powerstrokes) 1988-1993. Top Contributors this Month View All. RT 26 Replies. bugman 25 Replies. B. bismic 19 . -Actual compression test results on a 40*F (cold, not run in a few days) or so engine: 1: 360 2: 355 3: 395 4: 375 5: 420 6: 365 7: 365 8: 355 Truck starts quickly cold or hot and runs pretty smooth. This is my first experience with an OBS 7.3 so I'm not quite sure how smooth it should run, but for a diesel, seems pretty good. Pre-Power Stroke Diesel (7.3L IDI & 6.9L) - Compression test 7.3 IDI - I recently bought a 1993 F250 with 7.3 idi NA and the engine is blown(at least what I was told). Supposidly it came to Alaska with water only in the block. The discription I was given was that the oil pan was full of water and had even frozen. I.
New truck: 1988 F-350 1 ton dualy 2*4, 7.3L IDI Naturally Aspirated, . Might not be enough to show itself during a compression test. 1993 F-350 crew cab non-turbo 5 speed transmission 40 years a mechanic on large stationary engines natural gas and diesel fired, and other industrial equipment. .
Did test two more times same result 380 psi. I added about half of a McDonald's straw full of oil to the #1 hole and ran another compression test and it raised compression up to 420 psi this time. I got oil out of the cylinder and ran a cylinder leak down test " rocker arms removed" results were 80% cylinder leagage on #1. 1996 Int 4700, 175hp DT466, 5 speed, 2x rear end, service body 2001 F350 SRW flatbed, 4x4, crew cab 1978 International F2275 Dump Truck 1996 NH LX665, steel tracks on foam filled tires The control unit ground test yielded 1.7 ohms. After cleaning the ground and connections, I was down to .8 ohms which is in spec with the manual. I am rather confused with the control unit functional test. The manual says to hook up a test light to the test terminal of the controller and count the seconds it stays on after the GPs have been .
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1988 7.3 compression test|How to perform a Compression Test on a 7.3 Powerstroke