Skip the auto shop - Our mechanics make house calls

Q: possible misfire or trans/torque converter problem

asked by on

Above 40 mph Between 1400 and 1800 rpm and I give a little bit of throttle to accelerate and I get what feels like a random misfire, at higher rpm it doesn't do this. Cleaned throttle body and installed new tps. No misfire codes are showing up on dash when I turn the key 3 times. Would a obd pick this up or could it be cam sensor or map sensor. P.s. This truck has no mas sensor. I don't think it's trans or torque converter no slipping and it moves without throttle.

My car has 150000 miles.
My car has an automatic transmission.

A: Try driving the vehicle in regular drive or...

Try driving the vehicle in regular drive or 3rd gear out of over drive and get to the same vehicle speed and see if the problem is gone. Then try driving to a speed where the engine speed is 1400 to 1800 RPMs and also see if problem is gone. Then put it back into overdrive on selector and repeat to see if problem comes back. If it does, then the problem is in the torque converter overdrive or solenoid that controls the shift to that gear. If you want to have this checked, a qualified pro from YourMechanic can come to your car's location to inspect the possible misfire to have this corrected.

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・Save up to 30%

Get a quote

What others are asking

Q: Car leaks and overheats

This vehicle is known to have two major failures in the cooling system; the radiator or water pump may be leaking. This would account for the loss of coolant; if the coolant gets low enough, it causes the engine to...

Q: Transmission acting up

The vehicle may need to have it's computer reprogrammed to improve the shifting performance of your transmission. The manufacturer has a technical bulletin available to reprogram the system correctly for your particular vehicle. It all depends on what exactly is...

Q: Squeaky noise at the back of the car.

This would need to be heard while driving the vehicle to try and to diagnose if it is a brake or suspension problem. Recommend a qualified mechanic check it out for you.

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...