Skip the auto shop - Our mechanics make house calls

Q: no fire on number 4 injector

asked by on

going down the road starts running bad. put new cam in it . missing had chev put new computer on it still missing no fire on number 4 injector have replaced sparkplugs and wires have replaced number 4 injector

My car has 199000 miles.
My car has an automatic transmission.

Hi there. Without being there to download any error codes stored in the ECU, my best guess would be that you have a damaged camshaft position sensor. However, if the cam was changed, but the timing or ECU was not adjusted accordingly, that could also be the source of your troubles. It might be a good idea to have a professional mobile mechanic come to your location and complete an engine is misfiring inspection.

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

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: When I turn on my headlights all my interior lights turn off like dash lights stereo and door buttons

The interior illumination through the head light dimmer control should be checked that the dimmer is turned to its brightest setting when the lights are on. If so then the light switch power supply for dimmer control needs replaced. If...

Q: Bad gas mileage

Hi there. Quite often a damaged catalytic converter will mask other mechanical issues that impact fuel economy. One culprit in particular is the EGR valve. The EGR valve works in conjunction with the catalytic converter to help reduce particulate matter...

Q: Can i drive my truck with a small leak from the oil pan gasket

Hi There, Unfortunately, an oil leak from the oil pan is the area of the motor with the largest capacity of oil. A leak from this area can quickly go from very minor to very major with little time to...

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...
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.