Skip the auto shop - Our mechanics make house calls

Q: how to tell if timing chain is bad

asked by on

I have 220 psi of cyl compression not enough power to pull itself out of driveway have random misfire code

My car has 225000 miles.
My car has a manual transmission.

A: Hello and thank you for contacting YourMech...

Hello and thank you for contacting YourMechanic. Misfires can be caused by sloppy timing chain, spark plugs and wires not working, injectors not working, or a problem within the engine. To check the timing chain, get a timing light and hook it up to the battery and hook up the inductive pickup to the number 1 spark plug wire. With the engine running, shine the test light onto the harmonic balancer and see if the timing light is steady or if it moves around. If the light moves around, then the timing chain is loose and it needs replaced.

Check the spark plug wires for any spark. Then check the spark plugs for any burn spots or if the spark plug has fuel on it. Check the injectors with the engine running by pulling off the harness to each injector one at a time. If the engine changes tones and stumbles then the injector is working. If there is no change, then the injector may be not working. If the compression to the engine is 220, then there is a good seal to the combustion chamber and it leads to the timing chain, ignition, and fuel to cause a random misfire.

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: My truck suddenly didnt run

Hi There, This may be related to many different possibilities, some of which may be related to a lack of spark or possibly timing issues and some of which may be related to a fuel delivery problem or a combination...

Q: can i drive my car home from work when i found out i had a misfiring cylinder this morning?

A misfire can be caused by several components and if you should drive it depends on the issue that is occurring. Most likely if you made it to work without any major issues, you can make it back home. It...

Q: how much does it cost to have a drive shaft installed if you take the driveshaft to the mechanic?

Hi there. Our technicians come to your home or office 7 days week. Your Mechanic has several available technicians that can assist you with a driveshaft replacement service. Quotes cannot be generated via the ask a mechanic portal. Your request...

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.