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?

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?
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 wont accelerate over 20mph. what can it be

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: Car will not start in cold weather.

It could be a number of things causing the problem. I would have a technician change the fuel filter and check fuel pressure and test to see if it's getting spark at the spark plugs. I have seen these cars...

Q: Engine reduced power - 2008 Cadillac CTS

Hi there. The issue you're describing indicates that your CTS may have entered a "limp mode". This situation is caused by a sensor that discovers a problem within your transmission. When the issue is found, an error code is registered...

Q: P0740 - Torque converter clutch malfunction.

Hi there. The torque converter clutch code has came on for the input shaft sensor has picked up a different speed when the engine is running. The clutch is slipping in and out of lock. Check the transmission fluid and...

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...