Need Help Diagnosing
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5th Wheeling
Joined: Apr 2021
Posts: 33
Likes: 5
Need Help Diagnosing
I've recently just replaced the injection pump in my 7.3 idi. Once I tried to bleed the lines I realized that my electric fuel pump wasn't working and ended up having to replace it. Once I got the girl bled and tried starting her she wouldn't budge without some ether. Once started it sounded very...... I don't even know..... wrong. I also just did an oil change because there was fuel in the oil and it was overfull from the injection pump being bad.
I'll attach a video or two. Any help would be appreciated.
I'll attach a video or two. Any help would be appreciated.
Last edited by tjc transport; Feb 15, 2022 at 06:30 AM. Reason: fixed links
Fleet Mechanic
Joined: Sep 2016
Posts: 1,519
Likes: 224
From: Nevada
My guess is you have the timing off.
Even if you lined up the marks, or made a mark where the old pump was,
And lined the new pump to one of those marks, your timing will be off.
Turning the pump to the Pass side will advance the timing,
Turning the pump to the Drivers side will retard it.
With the "Engine off", advance the Pump (as the guys say) a Dimes with
at a time.
Be sure to mark it where you are now, just a reference point.
I had to highlight your links and click on open link to open them.
The good thing you won`t have any Mosquitos in the neighborhood.
Charlie
Even if you lined up the marks, or made a mark where the old pump was,
And lined the new pump to one of those marks, your timing will be off.
Turning the pump to the Pass side will advance the timing,
Turning the pump to the Drivers side will retard it.
With the "Engine off", advance the Pump (as the guys say) a Dimes with
at a time.
Be sure to mark it where you are now, just a reference point.
I had to highlight your links and click on open link to open them.
The good thing you won`t have any Mosquitos in the neighborhood.
Charlie
Thread Starter
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5th Wheeling
Joined: Apr 2021
Posts: 33
Likes: 5
My guess is you have the timing off.
Even if you lined up the marks, or made a mark where the old pump was,
And lined the new pump to one of those marks, your timing will be off.
Turning the pump to the Pass side will advance the timing,
Turning the pump to the Drivers side will retard it.
With the "Engine off", advance the Pump (as the guys say) a Dimes with
at a time.
Be sure to mark it where you are now, just a reference point.
I had to highlight your links and click on open link to open them.
The good thing you won`t have any Mosquitos in the neighborhood.
Charlie
Even if you lined up the marks, or made a mark where the old pump was,
And lined the new pump to one of those marks, your timing will be off.
Turning the pump to the Pass side will advance the timing,
Turning the pump to the Drivers side will retard it.
With the "Engine off", advance the Pump (as the guys say) a Dimes with
at a time.
Be sure to mark it where you are now, just a reference point.
I had to highlight your links and click on open link to open them.
The good thing you won`t have any Mosquitos in the neighborhood.
Charlie
Mountain Pass
Joined: Apr 2020
Posts: 189
Likes: 25
An important part is what method you used to replace the pump. Was the timing gear disturbed or was it replaced inly using the three bolts?
If you used the bolts, things are simplified. When I went down this rabbit hole, white smoke called for advancing.
More experienced folks than I could probably chime in as to whether a new pump without new injectors could cause problems with previously ok (seeming) injectors. I say this because it sounds like there is at least one dead cylinder. Or it could be rotating misfires.
If you used the bolts, things are simplified. When I went down this rabbit hole, white smoke called for advancing.
More experienced folks than I could probably chime in as to whether a new pump without new injectors could cause problems with previously ok (seeming) injectors. I say this because it sounds like there is at least one dead cylinder. Or it could be rotating misfires.
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