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Matt, Engineer
Category: GMC
Satisfied Customers: 21599
Experience:  Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.
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Cleaning exhaust filter keep dring, have 85k on 3500 hd,

Customer Question

cleaning exhaust filter keep dring
JA: How many miles are on the car? How has your mileage been lately?
Customer: have 85k on 3500 hd
JA: What year is your 3500?
Customer: 2013
JA: Are you fixing your 3500 yourself? What have you tried so far?
Customer: replaced air filter, replaced secondary MAF sensor, cleaned main airflow sensor
JA: Anything else you want the mechanic to know before I connect you?
Customer: reduced engine power message also
Submitted: 8 months ago.
Category: GMC
Expert:  Matt replied 8 months ago.


as you have a reduced engine power message then there should be an error code you can pull off the ECU with a scan tool

this is by far the fastest way to get to the bottom of it

it’s also worth considering fitting a new fuel filter as if only slightly blocked this can lower fuel supply pressure and choke the main pump, the pump will be more sensitive to this when its cold as diesel thickens considerably with low temperatures.

Expert:  Matt replied 8 months ago.


do you still need help?

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