Megane, engine cranks but not doesn't start sometimes

RIZZARDI

MEMBER
2003 RENAULT MEGANE
58,000 MILES

My Megane does not start sometimes, the engine try to start, it cranks but doesn't start, does not matter if it is hot or cold, I've had to push the car to start, I can drive the car for 1, 2 days without problem and then it just does not star sometimes. TDC sensor and camshaft sensor has been replaced, the mechanic cannot find the problem, could anyone help me?

6 Replies

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

CHECK TO SEE IF IT IS MISSING SPARK OR FUEL WHEN IT DOESN'T START. ONE WILL BE MISSING AND THEN YOU WILL KNOW WHERE TO LOOK.

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Monday, July 23rd, 2012 AT 2:06 AM

RASMATAZ

MECHANIC
75,992 POSTS

Also refer to this walk thru link: https://www.2carpros.com/articles/car-cranks-but-wont-start

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Wednesday, February 22nd, 2023 AT 4:05 AM

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

We never received a final response from the prior individual. However, an engine needs 4 things to run, fuel, compression, correct ignition timing, and spark at the plugs.

Try this and let me know the results. See if the engine starts if you use starting fluid. If it does and then stalls, we will know it is fuel related. If there is no change, suspect ignition spark to the engine.

Here is a link explaining how to check for an ignition spark:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

Let me know what you find. Also, if possible, record it cranking and upload it for me to hear. If there is an issue with timing or compression, I should be able to tell.

Take care,

Joe

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Thursday, February 23rd, 2023 AT 5:50 PM