Skip the auto shop - Our mechanics make house calls

Q: Hesitation stumble and lack of power at low rooms and speeds.

asked by on

Engine lacks power at takeoff speeds and low rpms. Shutters when cold. Rebuilt trans and engine. Fluids are still clear. New fuel filter, mass air flow sensor, tps sensor, New spider updated injectors, New iac sensor cleaned throttle body and egr valve and passages. Pcv valve functions as should checked for vacuum leaks. Took truck to belle tire for fuel pressure test and checked out. Can drive truck on highway at higher speeds with no issues. New billet distributor with rotor and cap. New spark plug wires and plugs.

My car has 1000 miles.

A: You should check the crankshaft damper for ...

You should check the crankshaft damper for evident movement of the damper’s outside part from the inside part. The rubber in the middle may have slipped. This would cause the distributor timing to be set incorrectly. You can recheck the timing again to see if timing is not set correctly and needs to be adjusted again. Try advancing timing and see if problem goes away. If it does, then replace the damper and reset the timing to specifications. A certified mechanic, like one from YourMechanic, can come to your location to diagnose your loss of power firsthand if you end up needing assistance with this. Good luck.

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: Clicking in motor. Losing power and cutting off while driving. Any ideas?

Hi there. In many cases, a clicking or ticking sound is caused either by a damaged serpentine belt or can be caused by the valves or cylinder head hardware that is not properly lubricated. The fact you're losing power and...

Q: Lost the truck key and went to dealer to get a new one. Got home and it won't turn the ignition on. What could be wrong? It unlocks doors but that's it.

Hi there. The key will have to be programmed to your vehicle. First put the key in the ignition switch. Turn on the switch to the 'ON' position. Then press the unlock button and hold it. Turn off the ignition...

Q: Either the oil pump or oil sending unit is going bad. I don't know which one.

Hello, If you are able to ear noticeable lifter noise or other valve train noise, it is quite likely your oil pressure gauge may be correct and that your oil pump may be failing or you are just low on...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.