Skip the auto shop - Our mechanics make house calls

Q: Electrical signal to the injectors randomly malfunction

asked by on

When first starting my car, it will run well. However, after starting it will lose the signal to the injectors. This problem is intermittent and doesn’t happen all the time. I have checked many things from the injectors to the fuel pumps and everything looks good and seems to be working well. The problem is with the electrical signal to the injectors and they stop randomly. Why are they stopping and what can I do to fix this car?

A: Hello. The issue you are experiencing is li...

Hello. The issue you are experiencing is likely an intermittent crank position sensor failure. The crank position sensor is largely responsible for the fuel injector pulse because the pulse is alternated when the sensor passes certain points on the crank. If the sensor stops communicating the fuel injector pulse will stop until communication resumes. I suggest that you have a technician test the crank position sensor with a multimeter or a scan tool. If it’s proven to be bad, replace the crankshaft position sensor as necessary.

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: P0206 and P0207 showing up

Hello the codes P0206 and P0207 indicate faults in the fuel injector circuitry for cylinders 6 & 7 respectively. It means the engine management computer detects an electrical fault. This may simply be a bad electrical connection, or failure in...

Q: Need to know if the fasteners are metric or sae

This vehicle will have a mix of both metric and SAE on the vehicle. This early years of vehicles were a mix.

Q: Po155cnf bank 2 sensor heater circuit P1620cnf Also code

The P0155 is the oxygen sensor located on the rear bank of cylinders and before the catalytic converter. Given your mileage, both oxygen sensors (pre-catalytic converter) should be replaced. The pre-cat sensors have the most affect on fuel mixture, saving...

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...
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...