Injection pump timing

CD-powered vehicles, specifically the Sentra, but also retrofits and swaps.

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bmktw2
Posts: 27
Joined: 8 years ago

Injection pump timing

#1

Post by bmktw2 » 5 years ago

Image

Got the pump re-sealed. Cost me $275 and a trip to midway.
Now Ive got the pump back in, the pulley installed(not shown in image), the engine at TDC, and the timing/lift gauge in the port. I just dont understand the 23 cog concept because I see no timing marks on the pulleys. Does it mean the key-way?

Image
Last edited by bmktw2 5 years ago, edited 1 time in total.

bmktw2
Posts: 27
Joined: 8 years ago

Re: Injection pump timing

#2

Post by bmktw2 » 5 years ago

okay I looked closer and saw the marks. They look like punch marks.
I did the 23 cog gap and set the pump:
Image
Help with the next step would be greatly appreciated! :D

bmktw2
Posts: 27
Joined: 8 years ago

Re: Injection pump timing

#3

Post by bmktw2 » 5 years ago

Image

So now I'm looking at this gauge scratching my head:
Image

90 mark passed big 2 with engine at TDC
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I'll go ahead and lock her down here... then spin the motor over twice and check it again.

bmktw2
Posts: 27
Joined: 8 years ago

Re: Injection pump timing

#4

Post by bmktw2 » 5 years ago

Image
Image

bmktw2
Posts: 27
Joined: 8 years ago

Re: Injection pump timing

#5

Post by bmktw2 » 5 years ago

Image
Image
I've got it running finally.
There is a solenoid on the output side of the pump which allows fuel to enter the pump.
For some reason, mine was not getting +12v so I jumped wires and got the engine cranked, but I did NOT have the intake tube/throttle body installed so the idle was through the roof. It did run, but only a few seconds. In the images shown now, the intake is installed and I'm working on getting anything else resolved to have this little tank running again soon

plenzen
Posts: 867
Joined: 12 years ago
Location: Cochrane Alberta Canada

Re: Injection pump timing

#6

Post by plenzen » 5 years ago

Nice photos of your ???? "journey" through this.

Looks like a huge PITA to deal with only because of the lack of room.

Did you find the cause of no power to the fuel shut off solenoid ?
Retired Pauly
Problem with being retired is that you never get a day off.
1987 D21-J SD25 KC
KJLGD21FN

bmktw2
Posts: 27
Joined: 8 years ago

Re: Injection pump timing

#7

Post by bmktw2 » 5 years ago

Thanks!
Well I found a burnt fuse today.... But I dont have one to replace it...
I also found no power going to the RPM sensor on the pump.
Prolly why the engine goes WOT once it starts up.
I got to fix a few things first... not sure if its just a bad ground or what... :roll:

bmktw2
Posts: 27
Joined: 8 years ago

Re: Injection pump timing

#8

Post by bmktw2 » 5 years ago

Engine fires right up but goes to WOT. Can't figure out why... Ive adjusted the idle screw all the way back... dont know what else to do. Does the rpm sensor wire leads supposed to have power? Niether of my wires going to the rpm sensor have power

plenzen
Posts: 867
Joined: 12 years ago
Location: Cochrane Alberta Canada

Re: Injection pump timing

#9

Post by plenzen » 5 years ago

It sounds like when they re-sealed the pump they put the rack ( or whatever its referred to in a distributor type pump ) in backwards.

Paul
Retired Pauly
Problem with being retired is that you never get a day off.
1987 D21-J SD25 KC
KJLGD21FN

bmktw2
Posts: 27
Joined: 8 years ago

Re: Injection pump timing

#10

Post by bmktw2 » 5 years ago

faaak

plenzen
Posts: 867
Joined: 12 years ago
Location: Cochrane Alberta Canada

Re: Injection pump timing

#11

Post by plenzen » 5 years ago

Indeed

I hope I am wrong,
it's happened before,

Keep us posted
Retired Pauly
Problem with being retired is that you never get a day off.
1987 D21-J SD25 KC
KJLGD21FN

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asavage
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Location: Duvall, Wash.
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Re: Injection pump timing

#12

Post by asavage » 5 years ago

The RPM sensor is only for the EGR system, has not voltage at its connectors to speak of (well under 1 volt), and does not affect the RPM at all.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

woytek
Posts: 2
Joined: 5 years ago

Re: Injection pump timing

#13

Post by woytek » 5 years ago

Hello All.
First post :mrgreen:

I have same problem, like described but with TD27 - if RPM sensor don't work, engine stop just few second after start, maybe some way RPM cut off fuel selenoid on pump. Disconect oryginal cable, connect +12 on selenoid from aku over some fuse and start engine.

There also will be a RPM boost (i think) - works when engine are cold/AC are enabled.
Was on Zexel pump, TD27 with mechanical pump.

This was my expirience with different engine, I have also CD17 but without EGR, just fuel selenoid.
Diesel:
- CD17 84',
- TD27 93',
- ETI27T 04' + LPG injection (electronic pump + TD27),
- ETI28T 98' + LPG injection (similar to LD28->TD28->ETI28T),
- YD25 06' CR engine.

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