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I have a Volvo vn640 tractor with volvo d13 motor, 2011. We…

I have a Volvo vn640...
I have a Volvo vn640 tractor with volvo d13 motor, 2011.
We have a hard start issue lately, just cranks and cranks in the morning until it finally starts.
The davco fuel filter is filling up quickly, within a week.
We get code spn 94 fmi 18 and pid 94 fmi 7.
Fuel Delivery Pressure
Mechanical system not responding properly.When the code pops up we change the filter and the code goes away but the hard start remains.
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Answered in 47 minutes by:
12/11/2017
Technician: Daniel Wilson,
 replied 4 years ago
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 15,097
Experience: Owner at DJ Wilson
Verified

Hi ,My name is***** will be glad to help. We can follow up as needed on here, bare with me while I review your information. Im not an employee of the site but I help on here as time allows in between jobs. Response time will vary depending on my work load , etc each day.

spn 94

FMI 18 • Data valid but below
normal operating
range - Moderately
severe level
• Drop in fuel
pressure
• Engine derate • Clogged fuel filter
• Faulty fuel pressure sensor
• Leaking fuel line or fitting
• Poor fuel pump response

Ask Your Own Medium and Heavy Trucks Question
Technician: Daniel Wilson,
 replied 4 years ago

FMI 7 • Mechanical system
not responding
properly
• Drop in fuel
pressure
• Engine derate • Clogged fuel filter
• Faulty fuel pressure sensor
• Leaking fuel line or fitting
• Poor fuel pump response

If the code is now gone check for restrictions or leaks and a possible weak fuel pump, faulty pressure sensor.

Please take a moment to rate as that is how the site credits my time helping on the site or let me know if you need more help. 5 star and bonuses are always greatly appreciated.

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Customer reply replied 4 years ago
What pressure sensor?Would a faulty fuel pump or sensor cause the davco to fill up sooner than normal?
Technician: Daniel Wilson,
 replied 4 years ago

You mean getting plugged or contaminated? If that is the case check the fuel tank for sludge or trash/sediment in the tank for either vandalism or bad fuel. The system will need to be cleaned out.

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Customer reply replied 4 years ago
Would this be causing the hard starts?
Technician: Daniel Wilson,
 replied 4 years ago

Absolutely it would.

Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 15,097
Experience: Owner at DJ Wilson
Verified
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Daniel Wilson
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