Skip the auto shop - Our mechanics make house calls

Q: Truck wont accelerate over 20mph. what can it be

asked by on

92 ranger xlt v6 4.0 transmission replaced, fuel injectors replaced, heads new, engine replaced 500 miles on engine. Had multiple mechanics look at it but they can't figure it out. Truck wont go faster than 20mph Any ideas?

A: Either you have a blocked exhaust like a ba...

Either you have a blocked exhaust like a bad converter, a muffler clogged from a broken up converter, or you have a bad ignition module or fuel pressure problem. First try replacing the fuel filter to see if it is clogged. Check to see if the fuel pressure is at 40 psi. If this is okay, then see if the exhaust is blocked. If you would like another opinion on the car, a certified pro from YourMechanic can inspect the acceleration issue and let you know what should be done.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Poor idle car keeps shutting off

Sound like your fuel pump stopped or something else is causing the no start like timing belt? Have the vehicle checked and diagnosed by a mechanic like one from YourMechanic.com to find the reason of the no start.

Q: Will the mass airflow sensor stop my car from reaching proper acceleration?

Hi, thanks for writing in. A faulty mass airflow sensor can certainly effect power, performance, and economy. If the engine computer does not read the mass airflow or any other sensor, it relies on basic settings to run. It does...

Q: 2006 Kia spectra stops shifting seemingly randomly.

Hi there. The transmission may have a failed harness or a failed computer (TCM). With having all of the shift solenoids and the torque converter clutch not functioning correctly, then there is a connection error. Remove the harness to the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.