Q: why does my engine still stall after cleaning distributor cap, replacing air cleaner, fuel filter and spark plug.

asked by on

At first my car idles roughly during take off then dies afterward. the last activity done was engine support replacement. What i did is to replace air cleaner, fuel filter and spark plug. at first it run smoothly but after taking a short ride it began to stumble and die again.

My car has 100000 miles.
My car has a manual transmission.

A: Cleaning your distributor cap is not usuall...

Cleaning your distributor cap is not usually successful. The cap can have problems that cannot be seen with the naked eye. It should be replaced along with rotor, spark plugs, and spark plug wires. The description of your symptoms certainly seem to be ignition related, but fuel supply could be an issue.

I would use a test light to short each cylinder one at a time to isolate which cylinder is misfiring. It could be all of them. You will want to insert the test light between the boot and the wire at the distributor cap or spark plugs. Do not pierce the wires or boots. You need to make sure the tip of the test light slides between the boot and plug wire. The cylinder that doesn't respond, or responds very little, is the cylinder or cylinders that is not firing.

Once I know which cylinder or cylinders are missing, I would inspect the spark plug, do a compression check and check to see if the injector is firing. Here is a fuel injector tester, this is the one I use. It works surprising well. Depending on what I find up to this point, I might check fuel pressure and compression check every cylinder. It is possible the timing belt has jumped a tooth or two. If you haven't already, you should check the ignition timing.

If you need help, book an appointment with a certified technician, like one from YourMechanic. One of our mobile experts will be able to come to your home and diagnose the misfiring engine firsthand.

Good luck!

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's clutch is stuck.

The clutch may have broke and is not engaging the transmission input shaft or the transmission input shaft has broke in the transmission. The only way to tell is to have the transmission removed and the transmission and clutch checked....

Q: Hard to shift, shaky clutch, started smoking

Hi there, thanks for writing in. I'd be happy to help. The leak is most likely from the clutch slave cylinder. Look in the clutch master cylinder reservoir and see if it is low or empty. If it is, then...

Q: Will my transmission be ok after driving without differential oil?

Anytime you run a component without the proper lubrication, you run the risk of damaging the component. Once you install the correct amount of lubricant and drive it, you will find out in short order if running it without lube...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...