2001 Jaguar XJ8L - Intermittant starting problem -gives Gearbox Fault & when you turn the key ,the engine does not start, battery good. I think It might be a wiring or switch problem. When the car does crank - no codes & runs fine.

See if the repairs ideas on you tube can help.

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I had a problem with my car cutting out it turned out to be a bad wire connection to the battery due to the battery sliding about

DID YOU RECONNECT IGNITION COILS AND THE VARIABLE VALVE TIMING SOLENOIDS.CHECK SPARK PLUGS IF YOU GETTING SPARK AT SPARK PLUGS.MORE LIKELY VALVE TIMING OFF.

There could be many reasons why the car won't start. If you are correct about the gas, and the injectors aren't clogged, Syphening out the old gas, adding fresh premium gas, and having a helper spray starting fluid in short bursts into the air filter intake while you turn the engine over should start the car. Good Luck.

check the grounds to the ECM mate you got a ground fault going to it

If the car starts again without trouble - it is probably an air leak on the inlet manifold or associated pipework. If the car is very 'lumpy'' then stops it could be a coil-pack or mass airflow assembly - also this fault sometimes triggers a gearbox fault warning as the engine and gearbox become out of sync. due to engine misfires.
The air leak fault will not always register in the fault code memory of the car whilst in its early stages. As the fault becomes greater - the engine will become hesitant - then stop. This is the time to spray leak detector spray around the pipes or manifold joints, as the spray gets 'sucked' into the leak and the engine note will change noticeably.
Hope this helps - good luck.

You may have a gasket leaking oil to the engine cylinders. Once you got it started the oil burned off and the engine will run fine until the next time....
Unfortunately, on this car, it a VERY expensive problem to get fixed.
If the problem occurs again, be careful not to flood the engine. Try to get it running again, and take it in for a professional estimate and repair.

sounds like its backfirinf is the ignition coil working properly?

Hi Darrin

Try disconnecting the battery + & - terminals.

Turn the ignition key several times to erase the computers memory.

Reconect the battery + terminal then - and start the car.

Your fault code, will hopefully not return.

Good Luck !

John

hi,change the gear box solonied c.should b ok than ali g autos birmingham 07971335303