Skip the auto shop - Our mechanics make house calls

Q: Problem with valve injectors.

asked by on

One of my valve injectors is not working properly. My truck shakes too much. Six months ago I replaced the original injectors. The new ones worked fine until now. Now the shaking is back again.

A: There quite a few things that will need to ...

There quite a few things that will need to be checked. Fuel pressure and fuel pump volume need to be looked at along with a fuel sample. Incorrect fuel pressure or low fuel volume will effect the amount of fuel flowing through the injectors. Now your fuel delivery, or fuel injection timing, is set by the engine computer looking at several inputs including the airflow meter and the engine coolant temperature sensor. Injection timing is further corrected by what the oxygen sensor is reading, an aged or lazy oxygen sensor can adversely effect the air fuel mixture. You may want to enlist the help of a mechanic, like one from YourMechanic, who has the test equipment to diagnose your fuel system and carry out the necessary repairs.

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: The car shakes and randomly cuts off while driving. The car has steam/smoke coming from under hood.

Hi and thanks for contacting Your Mechanic. If your engine light came on for the secondary air pump sensor, then it is possible that the secondary air pump (smog pump) has failed. The pump has oil in it and if...

Q: Intermittent startup problem

One of two common issues could be the case, assuming the battery is holding its charge: The ignition switch itself: the ignition switches on the Tacoma are known to wear out over time. The starter: taking a...

Q: Emission light was on

Hi There, The emissions light coming on may mean a couple of different things. One of these is the catalytic converter as you have indicated. The other reason this may come on could be a problem with your evaporative emissions...

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...
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...