cranks but no start

Abjmlo89 · Post by **Abjmlo89** » 02 Sep 2018, 08:22

have a nice day
i just cleaned my s 40 2002 idle control valve / camshaft sensor
and then the car won't start it just keep cranking till the battery dies
i checked the fuel pump the injectors the coils the spark plug the fuses
and checked it on obd2 and no fault found
please help me with this problem

Post by **alschnertz** » 02 Sep 2018, 15:23

Ok. At this point you should check the basics.
An engine only needs 3 things to run - fuel, spark and compression.

Fuel - Check the fuel pressure at the rail with a proper gauge. It should be 44 psi. Are you sure you have good fuel in the tank? Not contaminated with water etc.?

Spark - Pull the spark plugs, check the gap (0.028"+/-). Are the plugs relatively new? You can remove the plugs, plug them back into the wires, ground them, and crank the engine to see if they are sparking.

Compression - Check the compression with a proper gauge. It should be at least 150 psi and the 4 cylinders should all be within 10% of each other.

After those items have been checked and found satisfactory, check your camshaft timing marks.

You can try unplugging the MAF sensor and seeing if it will start that way (it may run with the MAF unplugged, but it won't have much power).

Abjmlo89 · Post by **Abjmlo89** » 02 Sep 2018, 16:25

Thank you very much sir
I just checked the valve that is in the end of the injector and the fuel pressure look very good . and cleaned the sparks they only 5 month used less than 15000 km and I just unplugged them and claean them test them and thier is a blue spark
Tomorrow I will test the Compression and check the timing belt .. Thank you again mr alschnertz

Abjmlo89 · Post by **Abjmlo89** » 05 Sep 2018, 15:34

I just do every thing you said and still the same problem but thier is a new thing happens .. Their is like a backfire from the throttle with explosion sound that's make the filter box cover open checked the timing belt and the timing and every thing is ok

Post by **RickHaleParker** » 07 Sep 2018, 03:12

My 2003 S40 acted like this after changing a slipped timing belt.

Charge up the battery, disconnect the camshaft sensor up by the firewall. Give it an extended crank and see if it will fire up on the lookup tables. Sometimes these Nedcars need a virtual bob on the head to get them out of a mind set.

HeavyFuel · Post by **HeavyFuel** » 09 Sep 2018, 18:52

Did this car run before cleaning the Idle Air Control Valve?

Abjmlo89 · Post by **Abjmlo89** » 09 Sep 2018, 18:55

Yes it works but the idle is moving up and down .. Now my. Mechanic said that the exhaust valve is broken and need to repair