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Old 07-26-2014, 01:13 AM   #1
bhowle
 
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Default D21 don't crank right up

My, new to me, D21 don't crank right up. It usually needs three or four cranks before firing up. This truck has 148,000 miles on it and I've replaced the distributor, rotor, spark plugs and air intake sensor.

My other fuel injected machines start with about half a crank.

So, from the least expensive cure to the most expensive cure, what should I try first?

BTW, it's a 4 cylinder 4x4 with a 5 speed manual.

Thanks,
-bob
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Old 07-26-2014, 01:36 AM   #2
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It could be losing the fuel prime. Does it do this if you let it run for a little while, turn it off, and crank it a few minutes later? Maybe look for fuel leaks?
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Old 07-26-2014, 02:42 AM   #3
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low fuel pressure? stopped up fuel filter?
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Old 07-26-2014, 04:07 AM   #4
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I have the same problem, it starts right up in the morning but after that it takes like 5 sec or until I step on the gas pedal. I've also replaced plugs, wires, cap, rotor, fuel filter, oil, oil filter and air filter 2 months ago. It did have fuel leaks but they already been fixed. Fuel pressure is good as well. The reason I replaced everything above was cuz it would lose power while driving like if it was not getting fuel. It started running good until I cleaned the airflow meter. But before that it always had a hard time starting up. I've been really wanting to check the engine compression. I'm subbing to this thread to see if anyone replies.
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Old 07-26-2014, 11:51 AM   #5
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Quote:
Originally Posted by Segundo View Post
I have the same problem, it starts right up in the morning but after that it takes like 5 sec or until I step on the gas pedal.
My truck is the opposite. It takes 2 or 3 cranks when it has been sitting a while, but afterwards it fires up quickly.
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Old 07-26-2014, 10:29 PM   #6
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Quote:
Originally Posted by alabama_lowlife View Post
It could be losing the fuel prime. Does it do this if you let it run for a little while, turn it off, and crank it a few minutes later? Maybe look for fuel leaks?

After it runs for awhile it'll usually crank right up if I don't let it sit for than a couple of minuets.

What would cause it to loose prime if that's the problem?

The fuel filter is $12.00 - guess I'll start there first.

Further reading on the Google - maybe it's the fuel check valve causing it to loose prime - that's not a too expensive 'try to fix it part either.

-bob

Last edited by bhowle; 07-26-2014 at 10:58 PM. Reason: thinking out loud
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Old 07-26-2014, 10:51 PM   #7
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My guess is maybe the fuel pressure regulator. I'm thinking the diaphragm might have a hole or something? Or just a leaking line that allows the pressure to bleed off.
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Old 07-27-2014, 06:07 AM   #8
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After doing some research it seems like I might have a bad fuel pressure regulator. My truck is hard to start, black smoke, smells like gas and has bad fuel mileage. Imma look into it.
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Old 07-27-2014, 06:09 AM   #9
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Have you checked that the pump is working properly? How about fuel pressure? It wouldn't hurt to replace the fuel filter since they are pretty cheap.
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Old 07-27-2014, 12:32 PM   #10
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he needs to check the codes. a leaking injector could cause a problem like that too. pulling the spark plugs would be a fast way to find out about the injectors.
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