Please Help!!
Please Help!! Im getting a misfire from cylinder 7, its not ignition, i changed the wire and plug. I believe its valve train because im getting a loud ticking from that cylinder. Whats funny is when i give it good gas it still performace the same. I even had some buddy of mine come check it out and they all say its the valve, what could be the problem with it? any help is appreciated, thanks
TECH Regular
Joined: Feb 2003
Posts: 451
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From: Spring Hill, TN
Bent pushrod is the most likely culprit. Have you done a compression test on that cylinder? That's what you should do first. Then if it shows a compression problem, pull the valve cover and remove that pushrod and check for straightness.
If it's straight you need to pull the head.
If there is no compression problem at all, then you might need to reconsider the source of your loud ticking, and swap the coil for that cylinder with another cylinder.
Just because the power feels the same, doesn't mean anything. You can easily lose 10% of the power and not really be able to tell.
If it's straight you need to pull the head.
If there is no compression problem at all, then you might need to reconsider the source of your loud ticking, and swap the coil for that cylinder with another cylinder.
Just because the power feels the same, doesn't mean anything. You can easily lose 10% of the power and not really be able to tell.
Originally Posted by jyeager
Bent pushrod is the most likely culprit. Have you done a compression test on that cylinder? That's what you should do first. Then if it shows a compression problem, pull the valve cover and remove that pushrod and check for straightness.
If it's straight you need to pull the head.
If there is no compression problem at all, then you might need to reconsider the source of your loud ticking, and swap the coil for that cylinder with another cylinder.
Just because the power feels the same, doesn't mean anything. You can easily lose 10% of the power and not really be able to tell.
If it's straight you need to pull the head.
If there is no compression problem at all, then you might need to reconsider the source of your loud ticking, and swap the coil for that cylinder with another cylinder.
Just because the power feels the same, doesn't mean anything. You can easily lose 10% of the power and not really be able to tell.
TECH Regular
Joined: Feb 2003
Posts: 451
Likes: 0
From: Spring Hill, TN
And the ticking sounds could be something else. Ticking sounds are normal...air system check valve, lifter bleed down (valve clatter), piston slap...
I'm not saying you should ignore the possible implications of the sound, just don't use the ticking sound as your only consideration in making a diagnosis.
I'm not saying you should ignore the possible implications of the sound, just don't use the ticking sound as your only consideration in making a diagnosis.
