Q: Truck bogs down at wot.

asked by on

Just changed the pcm, before that there were all sorts of problems. Now the only problem is when accelerating if you give to much throttle it bogs horribly. The longer you drive it the worse it gets. Thought it was a vacuum issue but have reran all vacuum lines. All are now new. Things I have changed, tps, maf, iac, fuel pump and filter, plugs, wires, dist. Cap, rotor button, pcv, and of coarse the pcm. Truck runs good on accel, cruises fine, however bogs down horribly at wot or anytime kick down is initiated.

My car has 175000 miles.
My car has an automatic transmission.

Hi there. It appears as if you’ve checked all the usual suspects that can impact acceleration "bogging" issues except for two the throttle body and fuel injectors. When you’re quickly applying throttle to a fuel injected engine, having a clean throttle body and fuel injectors will significantly improve vaporization of the gasoline; thus reducing the bogging potential. When fuel flow / air flow is restricted; this can cause a "rich" situation; which ultimately causes the engine to bog. I’d suggest cleaning your throttle body first and testing the repair to see if that clears things up.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Truck bogs down at wot.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Fuel gauge is not working and stays on empty.

The false empty reading on your dashboard can be caused by several different components. One of which is the fuel modules themselves. If they both have failed, it is likely do to an electrical power or data connection feeding into...

Q: Q: Power steering has stopped working

Your car has Electronic Power Steering Assist (EPSA). In this system, the EPSA module takes inputs from various sensors, and uses that information to control a reversible motor inside the power steering rack. The main input to the EPSA module...

Q: Clicking noise when turning

The front end of the vehicle uses many components to ensure a good ride and decent handling. The suspension system ball joints or sway bar end links can become worn over time and allow for extra movement. This can be...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.