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Jeremy, Certified Truck/Bus Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 3304
Experience:  ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician
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I have a 2006 volvo 780, i just press the acceleration a little

Customer Question

I have a 2006 volvo 780, i just press the acceleration a little and it idles all the way its not regulating, i changed the throttle position sensor and it still the same thing, any suggestions
Submitted: 2 years ago.
Category: Medium and Heavy Trucks
Expert:  cumminsdr replied 2 years ago.
Hello and welcome to Just Answer! I would be more than happy to assist you today.When you changed the TPS did you calibrate it to the ecm?
Customer: replied 2 years ago.
No how do i do that?
Customer: replied 2 years ago.
What do u do to calibrate the tps to the ecm
Expert:  cumminsdr replied 2 years ago.
When the TPS is replaced it needs to be calibrated, Put the key in the on position (engine off) press the throttle 3 times slow and then key off. The TPS will now be calibrated
Customer: replied 2 years ago.
I calibrate it and its still doing the same thing could it be a relay?
Customer: replied 2 years ago.
Would the vehicle speed sensor have anything to do with this cause the cruise control dosnt work either
Expert:  Jeremy replied 2 years ago.
My name is ***** ***** I will assist you with your concerns.
You have something going on that is going to need a deeper look into this.
You will need to connect a laptop and test with the key off what the percentage is showing on the TPS to see if the issue is actually related to the TPS, harness, ECM, or engine. There is no real easy way to have this resolved since you already tried the calibration method.

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