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

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: I' trying to start my vehicle and it made a loud clacking noise and the battery is drained

Hello. If the vehicle produced a clicking clacking sound when the key was turned then it may be possible that the battery or starter are the issue. A faulty, or low battery will cause the starter to click if it...

Q: Check Engine Light is on, trouble code P0011&12. I changed the oil and filter. I need to turn off the engine light to see if that problem is solved.

Hello. If the oil level was low or if the wrong oil war previously used then that can cause these codes to come up. Most of the time though, on this engine, it is caused by a failure in the...

Q: Engine takes to long to warm up I've replaced thermostat already and it misses horrible till it warms up its a 4.9 engine

These engines are known to get real bad carbon build up on the back sides of the valves. If you engine has a hard time getting to operating temperature then it will also cause the engine to carbon up even...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.