Extended crank before firing - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 6 (permalink) Old 12-18-2009, 10:05 PM Thread Starter
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Unhappy Extended crank before firing

HEY GUYS QUICK QUESTION. IN THE LAST FEW WEEKS MY TRUCK HAS GOT HARDER ANDHARDER TO START IN THE MORNING OR ANYTIME THE TRUCK SITS FOR MORE THAN 5 OR 6 HOURS. IT TAKES ABOUT 5 TO8 SECONDS OF CRANKING TO FIRE BUT ONCE WARMED UP. LIKE IF I RUN INTO A STORE OR GAS STATION IT FIRES UP RIGHT AWAY WHEN I GET BACK IN THE TRUCK. MY QUESTION IS COULD IT BE THE HEATER GRID GOING BAD OR DO I HAVE A FUEL ISSUE? THANKS
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post #2 of 6 (permalink) Old 12-21-2009, 08:14 AM
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I'd check for air getting into the lines. Could have a cracked rubber line. They can be cracked and not leak fuel. But, will allow air into the system.

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post #3 of 6 (permalink) Old 12-23-2009, 02:42 PM
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I agree it could be a air leak in the system...

Grid heater are only for cold cold weather that all if the block and manifold are above 32*F you really don't need grid heaters. But if there is a small air leak allowing a loss of prime to both the VP44 and the lift pump you could be cranking awhile.

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post #4 of 6 (permalink) Old 12-23-2009, 09:09 PM
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Quote:
Originally Posted by Mopar1973Man View Post
Grid heater are only for cold cold weather that all if the block and manifold are above 32*F you really don't need grid heaters.
Tell that to my 12v. It prefers 40* and above. THEN, I can forget needing the grids. The '99 will start at ~20* before cycling them once.

"Some people are educated beyond their intelligence."

'93 W350 CC, LE, 5spd, HTT modded H1C, 4" DE

Sold- '99 3500 Q/C, SO CTD, 4x4, 5spd.

Traded off- '97 3500 C/C, 4x4, CTD

'92 W250, LE, CC, CTD w/ tweaked pump (SOLD)


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post #5 of 6 (permalink) Old 01-13-2010, 02:51 PM
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Agreed. Start with looking for a leak in the system. I would still look at putting new relays in, they are cheap. The relays are probably the problem. My 02 did the same thing.
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post #6 of 6 (permalink) Old 01-14-2010, 01:15 AM
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My truck did the same thing short while after I purchased it. After checking the fuel system over and over for leaks and swapping Vp44s I still had the hard start issue. Then one day I had the truck running, popped the hood and noticed a really slow drip at cylinder 5 fuel line. Ended up being the cross over tube o-ring had a small nick in it. Changed all 6 at the time and the hard start went away.

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