Found the vibration today
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by John311t
how do i check to see if the injector is not able to keep up?
Most injectors, I have found, will give themselves away at the cold idle warmup. You'll have nearly a dead miss at 1100 rpm and the engine will rock like it's missing.
Postmaster
Joined: Dec 2005
Posts: 3,405
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When i did the CCT, it came up with 0% - 1% on all cylinders except number one which was at 5%. Alan suggested switching the soledniod off of #1 to #3 and see if the % changes. If so that injector is bad. It does have the rocking sensation at idle. Well i guess i added one more item to do tommorrow.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by John311t
When i did the CCT, it came up with 0% - 1% on all cylinders except number one which was at 5%. Alan suggested switching the soledniod off of #1 to #3 and see if the % changes. If so that injector is bad. It does have the rocking sensation at idle. Well i guess i added one more item to do tommorrow.
Postmaster
Joined: Dec 2005
Posts: 3,405
Likes: 0
It was actually a little higher than that, i did a punch of tests today in my post named codes, i got almost 6% on that number one injector today and 1% on another one with an 1298 IDM failure code. I did a KOER engine contribution and it said cylinder number 1 injector failure.
Postmaster
Joined: Dec 2005
Posts: 3,405
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Go to napa they are 50$. I honestly didnt have a hard to replacing it, other my say diffrent but it wasnt that bad.
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Freshman User
Joined: Mar 2006
Posts: 49
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From: Mapleton Utah
Originally Posted by John311t
I replaced it a few weeks back, when the vibration started because that was my first impression on what it could have been. I even shimmed it down and it did help on the start off vibration but not the one at 45-70. Could the driveshaft be out of balance? I do not understand what could cause it to act like this. Another thing i noticed, but it could be in my head, is when i put the truck in gear from a start, and let my foot off the brake from a dead stop the truck seems to be bouncing forward now, instead of taking off smoothly. I do not rememeber if it was always like that or not because i had the take off vibration because of a bad carrier bearing and it was not shimmed down. Any help at all is appreicated since im pretty close to giving up on this vibration and taking it to a shop to try and find it. It has been giving me hell for a month now and i have not found the problem.
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