Medium and Heavy Trucks
MY 1999 FL70 CAT 3126 IS LOSING POWER & SHUTTING ITSELF OFF BUT ONCE I RESTART IT AFTER PUMPING THE GAS PEDAL IT DRIVES
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Customer: MY 1999 FL70 CAT 3126 IS LOSING POWER & SHUTTING ITSELF OFF BUT ONCE I RESTART IT AFTER PUMPING THE GAS PEDAL IT DRIVES FOR A LITTLE BIT & LOSES POWER & SHUTS OFF. KEPT REPEATING TILL I GOT OFF THE HIGH WAY. WHEN DRIVING AT LOW SPEED IN THE STREETS I HAVE NO ISSUE AT ALL . IS THIS A SIGN THAT I NEED A NEW FUEL PUMP
JA: What is the complete model and serial number of your machine?
Customer: FREIGHT LINER FL70 1999 SERIAL 7AS57042
JA: Anything else you want the equipment mechanic to know before I connect you?
Customer: THATS IT
JA: What is the complete model and serial number of your machine?
Customer: FREIGHT LINER FL70 1999 SERIAL 7AS57042
JA: Anything else you want the equipment mechanic to know before I connect you?
Customer: THATS IT
Answered by yellowman99 in 9 mins 4 years ago
yellowman99
Auto Mechanic
16,260 satisfied customers
Specialities include: Auto Body Technician, Heavy Equipment Repairs, Heavy Duty Engine Repairs, Brake and Transmission Repairs
Thanks for asking you question. I will try and help you out.
Does the yellow or red check engine light come on just before it shuts down?
Does the yellow or red check engine light come on just before it shuts down?
Customer
No they don't
Customer
It's just losing power & shutting off & I have to pump on the gas pedal for it to start
Thanks for the information.
Sounds like low fuel pressure. I’ve seen this many times.
I would first replace the fuel filters. They may be clogged.
If filters do not help. You have either a faulty fuel pressure regulator on the back of the head. Or a weak fuel pump.
Please reply back if you need more help. I am happy to assist.
Sounds like low fuel pressure. I’ve seen this many times.
I would first replace the fuel filters. They may be clogged.
If filters do not help. You have either a faulty fuel pressure regulator on the back of the head. Or a weak fuel pump.
Please reply back if you need more help. I am happy to assist.
Customer
Yeah I changed all the filters & nothing changed
Thanks for the information.
I would suspect the regulator or pump.
To confirm. I like to connect a psi gauge to the fuel system to verify. The pressure should remain between 65-85 psi at all times.
Please reply back if you need more help. I am happy to assist.
I would suspect the regulator or pump.
To confirm. I like to connect a psi gauge to the fuel system to verify. The pressure should remain between 65-85 psi at all times.
Please reply back if you need more help. I am happy to assist.
Customer
If the pressure is below
It should never drop below 65 psi.
Customer
Kk got yah
You are very welcome my friend. I am happy to help.
Hey. Hope all is well. If my information was helpful. Please leave a good or higher rating. Thank you.
Customer
Question where's the fuel regulator for my truck located
It’s located on the rear of the cylinder head.
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