runnig bad
Fleet Mechanic
Joined: Jul 2003
Posts: 1,614
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From: Springfield, PA
Sounds like the Cylinder Contribution Test (CCT). If you can get a list of those codes and post them here, we'll be able to offer you much more than guesses.
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,352
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From: Lake Hartwell, GA
Also, I believe that during a CCT there are certain injectors that are prone to show as false failures. Might be worth your time and money to do a quick search here on the 99-03 7.3 forum for that specific criteria.
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Joined: Jul 2015
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Here's where I'm at. Mechanic got the computer installed and programmed. Was a lot better, no codes but still was running bad. Got a rebuilt injector and it didn't change. Said he was going to order an injector from ford. I asked him how much I was looking at so far. He said 150.00 for the computer program. I haven't found anything yet. Well ford injector didn't fix it. So he had his brother who is a mechanic at Ryder, I think is what he said come over to try and help them. His brother brought over his stuff for an injector problem. But said it sounds like a cracked ring. He's bringing over his leak down tester to check all the cylinders on that side......
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Cargo Master
Joined: Nov 2005
Posts: 2,766
Likes: 56
From: East Tawas, MI
Do you have heavy fuel dilution in your oil? Do you have to put a tampon on the tail pipe?
When it starts and idles, do birds fly away? I have a hard time believing a cracked ring is going to do this. Maybe a grenade piston, but..............
Get back to the beginning symptoms and take a step by step diagnosis of everything that you've done.
Time's worth money in this forum.
JS
Denny
When it starts and idles, do birds fly away? I have a hard time believing a cracked ring is going to do this. Maybe a grenade piston, but..............
Get back to the beginning symptoms and take a step by step diagnosis of everything that you've done.
Time's worth money in this forum.
JS
Denny
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No sir, oil is fine. Its been at the mechanic for three weeks now. I haven't been pushing because I have another truck and wanting to keep the cost down. It just had a dead miss when I took it to him. I was driving home and it was idling a little rough at a red light. Next red light it was loping pretty good. I blew out the fuel line the next day and it didn't change. I normally do everything myself but was at a loss as to what to try next so I took it to him. Hes been in business for over 20 years and has a great reputation. Him telling me, after having it for three weeks, so far I only owe him 150 for computer says a lot. BUT, Ive seen trucks with broken rings/bad valves. They skip like hell when they are turning over and puff like a freight train out the oil fill cap. AND, yes it has almost 200K on it. But it was my brothers. He never pulled, used either etc. Its had an easy life. Only way its a broke ring is because of a bad ring. Id bet anything THAT is not the problem. My 95 has 408K and id dive it across country today.
Cargo Master
Joined: Nov 2005
Posts: 2,766
Likes: 56
From: East Tawas, MI
Get it home.
Did you change the CPS to an oem?
How is your fuel filter?
Did you pull the plug on your ICP and see if it changed tunes?
Have you really payed close attention to all fittings for the ups and downs (clamp and clean, and then clean and reclamp method)?
Save a boat load and stay right here.
Denny
Did you change the CPS to an oem?
How is your fuel filter?
Did you pull the plug on your ICP and see if it changed tunes?
Have you really payed close attention to all fittings for the ups and downs (clamp and clean, and then clean and reclamp method)?
Save a boat load and stay right here.
Denny
Cargo Master
Joined: Nov 2005
Posts: 2,766
Likes: 56
From: East Tawas, MI
In retrospect after re-reading. Pull your negative cables overnight and let it sleep on it.
Report back bud.
Denny
Report back bud.
Denny
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Get it home? OH YEAH! When he said may have a cracked ring????? That's what went through my mind. I'm a pretty good mechanic and when he told me that I was thinking, OK, this may be more than you can handle. Great guy, great shop, would NEVER bad mouth him. But, I don't think hes equipped, or has the mechanics needed for this. LOL I'm actually a master electrician, but if you ask me about motor control. I'm lost. Never messed with them.
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I'm gonna go by tomorrow. The top of the motor is apart, to get to the injectors, talk to him and if he doesn't give me the warm fuzzies I'm gonna have him put it together and bring it home... Cracked ring????? oh lordy.... not buying it
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I went by and talked to him. His cousin, I thought it was his brother, came out and brought his scanning equipment, compression tester and leak down tester. He says compression of one cylinder is lower than other three but within tolerance. He did not know what the actual number was. And his cousin said same cylinder did have some leak down??? But, he did say the scanner pointed to another injector issue on the other bank. So hes going to replace that injector, reseal all the injectors and see where we are at. He started the truck, didn't have the skip like I have heard from engines with a dead hole. Once started it did smoke like crazy 10-15 seconds but he said they had the injectors out and that is oil from that. It cleared up but was still smoking some, white smoke. I did pull the cap off the oil filler and no blow by to speak of. AND there is some oil in the turbo which he said could be coming from the orings on the injectors. I feel somewhat better, but still am not sure what to think. Him saying, "you have a problem in that cylinder, it did leak down, not bad, and the compression is off but within specs"????????? Computer is not showing any codes
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