Will turn over but won't start

[flashflood394]

I bought a 89 2500 automatic 2 wheel drive 12 valve yesterday and I bought it knowing the injector pump was bad but it came with a new one. So I started messing with it today and decided to put everything the previous owner took apart back together just to make sure. So i hook everything back up and notice it has some weird fuel line stuff going on so I went to sort that out and ended up dropping the tank because the fuel was so bad. It looked like oil. Put a new fuel filter in it and new lift pump and dropped a fuel line into so nice clean new diesel and it's getting fuel to the injectors but just won't fire it will turn over all day long. What are some things I should check. I've never had a first gen before and my only other 12 valve never needed much work. Thank you


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[The DodgeFather]

Might be getting air in fuel lines and not priming. Maybe start buy purging all lines. Might be as easy as fuel from filter to tank. Unscrew your filter enough to see fuel is to the top of metal holes


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[The DodgeFather]

Nice clean truck by the way for the year that's in great shape.


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[Polaraco]

Is this an electric or mechanical lift pump?

If it's a diaphragm, there should be a priming lever on it. Jack that until it gets stiff. Spin it over and do it again. Then try starting.

If it's electric, turn the key on, and just TAP the starter. Wait a minute. Turn the key off and tap it again. 3 times.

Open an injector line and see if you are getting a strong squirt from it.

If the previous owner messed with the pump timing, that could be the problem too. To do it right, you need a magnetic timing meter.

Do you have any idea the condition of the injectors? If the fuel was that bad, they could be clogged and just dribbling fuel which will not ignite. @AccurateDiesel can help you with the injectors. He's a vendor and we ask you support our vendors first. He's the best I ever met, good prices and 100%.

I haven't done one of those in 30 years.

Oh No Blasphemy. Get that orange Ford out of your pictures.

Was this truck from a farm? Hair everywhere.

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[AccurateDiesel]

What a nice clean old truck! If you are getting a nice strong shot of fuel at each disconnected fuel injector line for each compression stroke then we have one of three problems:
1. Pump is timed improperly
2. Insufficient compression
3. Insufficient heat being generated to ignite the fuel (air intake grid heater not working, or cranking speed too low)

Since the injection pump was evidently being worked on by the previous owner timing would be high on my list (especially if the engine sounds like the compression is decent while cranking). These VE pumps require some special tools to time - basically a dial indicator and special adapter fixture to mount it to the pump. It is a fairly easy process if you can borrow or buy the tools.

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[flashflood394]

When I crack the injectors I get a decent spray of fuel coming out also so I don't know if that makes a difference but I'll be working on it some more today


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[marvincameron]

Let us know if you get it going


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[Polaraco]

What a nice clean old truck! If you are getting a nice strong shot of fuel at each disconnected fuel injector line for each compression stroke then we have one of three problems:
1. Pump is timed improperly
2. Insufficient compression
3. Insufficient heat being generated to ignite the fuel (air intake grid heater not working, or cranking speed too low)

Since the injection pump was evidently being worked on by the previous owner timing would be high on my list (especially if the engine sounds like the compression is decent while cranking). These VE pumps require some special tools to time - basically a dial indicator and special adapter fixture to mount it to the pump. It is a fairly easy process if you can borrow or buy the tools.

You're supposed to sell him injectors. LOL Thanks Tim

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[Polaraco]

When I crack the injectors I get a decent spray of fuel coming out also so I don't know if that makes a difference but I'll be working on it some more today


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OK are you tlking about the line or did you pull an injector and check the spray.

Chances are the timing has been monkied with or as said, the motor doesn't have the compression. I would imagine you'd hear that in the starter

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[The DodgeFather]

I still believe its air LOL either way will be neat to know what was the cause .

Try to loosen all of the fuel lines and crack it to allow more fuel to spray off of each one if you see bubbles it's air .

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