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Papikev252
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Joined
Jun 4, 2023
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Today at 5:07 PM
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Papikev252
reacted to
docstoy's post
in the thread
Random Multiple Misfire on all cylinders
with
Like
.
Don't know your engine mileage or your maintenance schedule, I would try lucas fuel and oil additive , in fuel tank and in engine oil.
Jun 22, 2024
Papikev252
replied to the thread
Random Multiple Misfire on all cylinders
.
Will do, it’s about 220k, I change the oil like every 5k.
Jun 22, 2024
Papikev252
replied to the thread
Random Multiple Misfire on all cylinders
.
If I snap the throttle it jumps to 10, if I slowly apply it it builds up to about 22-23 and doesn’t go anymore
Jun 21, 2024
Papikev252
replied to the thread
Random Multiple Misfire on all cylinders
.
Finally got time to put a vacuum gauge. It was between 19-20 Hg and would fluctuate with misfires.
Jun 21, 2024
Papikev252
reacted to
docstoy's post
in the thread
Random Multiple Misfire on all cylinders
with
Like
.
Should be OK
Jun 18, 2024
Papikev252
replied to the thread
Random Multiple Misfire on all cylinders
.
I’ll do that today, should I use the PVC as a vacuum source?
Jun 18, 2024
Papikev252
reacted to
docstoy's post
in the thread
Random Multiple Misfire on all cylinders
with
Like
.
Are misfires always on same cylinders ? Have you put a vacuum gauge and saw that vacuum was smooth and not jumping around ? Let's start...
Jun 18, 2024
Papikev252
replied to the thread
Random Multiple Misfire on all cylinders
.
Mainly yes, sometimes it doesn’t show on certain ones but it’ll reset to 0 every couple seconds. Most of the time it’s always the same.
Jun 18, 2024
Papikev252
posted the thread
Random Multiple Misfire on all cylinders
in
Engine Performance + Maintenance
.
99 K3500 7.4L 454. I’ve been chasing this random misfire over a year. I’ve changed just about every sensor and part I can think of, I’ve...
Jun 18, 2024
Papikev252
reacted to
2jduenas's post
in the thread
P0300 - misfire only at idle, none while driving
with
Like
.
Thanks for the update, glad you got it figured out!
May 17, 2024
Papikev252
reacted to
2jduenas's post
in the thread
P0300 - misfire only at idle, none while driving
with
Like
.
Thank you, let us know how that works out, happy wrenching and good luck
May 14, 2024
Papikev252
reacted to
Road Trip's post
in the thread
P0300 - misfire only at idle, none while driving
with
Like
.
Sincere thanks for closing the loop with the solution for a misfire that was resisting repair despite focused effort. Theory is good...
May 14, 2024
Papikev252
replied to the thread
P0300 - misfire only at idle, none while driving
.
Sorry I never got back. My problem was my manifolds were warped and caused a big vacuum leak. I used a smoke tester. Hope you find your...
May 11, 2024
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