would a contribution test show bad compression in a 7.3|FORScan / cylinder contribution : white label 1999 - 2003 7.3L Power Stroke Diesel - 7.3 misfire with compression results - Cylinder 8 failing contribution test. Swapped injectors no change. Vehicle has noticable misfire on idle. Zero blowby. 15 de dez. de 2023 · Bomba+ Patch+ União+ PI+ 2024+ ISO+ PS 2 . bomba-patch-uniao-pi-2024-iso-ps-2 Scanner Internet Archive HTML5 Uploader 1.7.0. plus-circle Add Review. comment. Reviews There are no reviews yet. Be the first one to write a review. 12 Views . DOWNLOAD OPTIONS download 1 .
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1999 - 2003 7.3L Power Stroke Diesel - 7.3 misfire with compression results - Cylinder 8 failing contribution test. Swapped injectors no change. Vehicle has noticable misfire on idle. Zero blowby. 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 . I am trying to figure out why my 7.3 Powerstroke is burning about 2 quarts of oil every 800-1,000 miles. I figured one of the easiest things to test is the cylinder rings so I performed a compression test while the engine was . 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 rocker arms for the quick connect fitting in the compression test tool kit. They .
I took it in to the dealer and was convinced #8 inj was bad. It was failing the cct and also failed the bench test. After the inj replacement it was still failing the cct about 1 out of 3 times.
Can FORScan be used to check cylinder contribution? I have (I believe) some injectors starting to have trouble in cold - cold weather starts. 50° day starts are no problem, . 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 removing .
CCT test: this test compares the RELATIVE BALANCE between the output of (not just the injs!) but. everything that contributes to the power output of that cylinder.which . I have a 2000 Superduty 7.3 and truck is missing and no power. Did a contribution test this morning and got 2 codes. p0269- Cylinder #3 Injector circuit . The PCM is reporting that when it gives the signal (or more when it removes the signal) to cylinder 7 to stop firing there is no difference to the idle. Meaning the test is to see . With the IDS, it's a power balance test. It has the ability to turn off the idle compensation strategy in the PCM. This way, you can really see what condition your injectors are in. You also have the ability to cancel individual injectors. The relative compression test can help determine if the problem is in the cylinder or the injector.
How to Perform a Compression Test on a 7.3 Powerstroke
So it doesn't seem like the contribution test can really tell you a lot and isn't that reliable in diagnosis. ? So is it worth it to buy the scanner to do this test then? I have a 2002 7.3L that we ran this test on 8 times and 2 times it coded cylinder 1 not contributing, and 6 times it didn't code anything. Now we don't know what to do???? So I have had conflicting information about compression for my 95 and 1/2 7.3. It has 183K and 350 lbs of compression. I had baby swamps and a new high pressure pump installed last spring. I was told the compression is . Have ran all tests and everything OK other than Cylinder Contribution Test for number 8 and velocity change for number 8 (all cylinders about 0 and number 8 at 5%). . Have purchased an AD injector and tempted to put same injector in number 8 and probably do a compression test at the same time for that cylinder. Other people have said that .
The compression test is really low and thus explains the hard starts and smoke. When truck is warmed up she runs fine. . You can expect the air to escape somewhere. If it goes into the crankcase, bad compression ring, damaged cylinder wall, or poss. damaged piston. If it goes into the intake, broken intake valve. If it goes into the exhaust . Apparently the mechanic only used a amp meter on the starter. that was the test used to determin that i obviously need a new engine. I am going to check it out real good before i drive it home, but my mechanic (who works on diesel trucks) said that if it has low compression just change the oil and get it topped off with rotella t 15-40 and drive it home that way, that . Just to let you know, the engine did have a miss before the o-rings and glow plugs were replaced. The latest contribution test showed weak compression still in the #7 cylinder, and the new injector in that cylinder is fine. The compression is over 400 in every cylinder except the #7, it still has just over 200 pounds. Only show this user #1
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 .
^^^^^ what he said. An injector buzz test will usually tell on a sticking injector. You have to do the test with the motor cold. Also a cylinder contribution test on a cold motor will tell what's working and what's not. The autoenginuity can perform a buzz test on the 6.0 but not a contribution test, yet.
1999 - 2003 7.3L Power Stroke Diesel - 7.3 Compression Question - My '02 7.3Ltr has been giving me trouble, running rough while cold, running good when hot, and throwing an IDM code (just a general code, nothing specific). I have tested the crap out of everything and finally took it to a shop. They diagnosed a bad IDM. Im working on a early 99 7.3, has a slight miss at idle when you start to accelorate it realy starts missing bad. Ran injector buzz test OK,run cylinder contribution test #8 cyl didnt pass. Pulled #8 out found orings burnt so replaced orings. Run motor to get air out of fuel & oil engine run better but still has miss, run same tests came back .
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Just bought an 01 F350 with 7.3 and 6 speed. Previous owner had it to the dealer last year and they replaced all 8 injectors, the injector harnesses, and odds and ends of other things. That has been about a year. I picked it up from him, it is missing. Put scan tool on it and completed the contribution test and found that #3 and #8 are dead. I tried to do a contribution test hot and cold, the cold test said cylinder 2 was not contributing but a hot test said cylinder 3 wasnt contributing, but the contribution test was done prior to the injector buzz test. I tore the valve covers off today, figured I would do a compression test to make sure my rings were not jacked. The mechanic did a mechanical compression check testing each cylinder and said they were in the 400 range except the number 8 cylinder which is at 150. He also said the turbo didn't look good and was only producing 17 when it should be in the 20s.
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The buzz test was good but #3 failed the Cylinder Contribution test. I've not lost/used any oil in the last 2500 mile. . AE too) needs to be atleast 170* I think. If you met that criteriea, and it consistantly fails cylinder #3. I suppose a compression test is in order now. Jim T. *48* SLAPS Co-Founder, 30.8 yrs RETIRED UAW . (It started . 1999 - 2003 7.3L Power Stroke Diesel - Low Compression, What Next? - I've got a 2001 with 235,000 miles. I bought it at 195,000 miles from a diesel shop that had rebuilt the engine, whatever that means. For the last six months or so it's been smoking at start up and burning oil. 3 months ago I replaced the injector. Compression Test results I got the compression tester in this week and ran some tests today. I ran the test using 5 revolutions of the engine. The engine was cold. Cylinder 1: 400 PSI Cylinder 3: 390 PSI Cylinder 5: 290 PSI Cylinder 7: 325 PSI Oddly enough, cylinder 3 tested out pretty good from what I can tell.
If you have good compression and good buzz test but keep getting a cylinder misfire most likely you have a bad UVC harness. These fail more than the other stuff mentioned. Also, do not run the truck with valve cover off unless you want oil everywhere! Thank yall for the responses. The truck has almost 250,000 miles on it. I ran it for about 1.5 hours through the hill country and this is the amount of blowby I had afterwards: 7.3 Powerstroke Blowby Does this look like an engine that is worth putting money into or should I just keep topping her off with oil till she blows up? As for the leaks, there is about a half-dollar . 1999 - 2003 7.3L Power Stroke Diesel - Cylinder Contribution Test Fault Codes - I performed a cylinder contribution test on an 01 with 145,000 miles on it. It has regular oil changes and well maintained one owner. It is currently running pretty good, just an occasional slight quiver. The fault codes that came up from. I had it checked by a shop and they told me the #2 injector was bad and the ICP was bad also. They wanted 00 to do the injector. The truck does burn oil, has white smoke on start-up and seems to have blow-by at the oil filler. I brought the truck home (did not have them do the injector work at that price) and did a compression test.
Only show this user . (cylinder contribution) test with a 7.3? Save Share Reply Quote Like. Sort by Oldest first Oldest first Newest first Most reactions. RT. 15853 posts Only show this user . -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 . Bad compression from worn rings and cylinder walls and/or valves can cause oil burning. The quality of remanufactured engines can vary widely.
FORScan / cylinder contribution
Hello, I have A 2000 7.3 with a strong misfire and blue/white smoke even at warm temp..pulled the codes on the ECM and came up with a P1316. Upon further diagnostics and a buzz test came up with P1276 - Cylinder # 6 high to low open indicating that injector circuit #6 . After doing the compression test on the 2003 truck, the numbers were cylinder1 415psi, cylinder2 425psi, cylinder3 425psi, cylinder4 440psi, cylinder5 410psi, cylinder6 400psi, cylinder7 425psi, and cylinder8 375psi. . My question is, what is the cross over from good compression to bad compression in the 7.3? I thought I remember hearing .1999 - 2003 7.3L Power Stroke Diesel - Blowby Test 7.3 - Hi Guys, So been dealing with a smoke issue. I had injectors taken out, reflowed/oringed and it still does it maybe less though. I made a Ford spec blowby tool, with magnahelic gauge. It calls for less than 4 of WC being a pass. I ran the test and I get like 0.5.
Cylinder contribution test
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would a contribution test show bad compression in a 7.3|FORScan / cylinder contribution