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Hi Shelley, you mean the engine turns over but won't start ? It's missing one of three things Spark , Fuel or compression ! The last time it ran , did it run ok or not good ? No blue smoke coming out the tail pipe or smoke coming from under the hood ? Were there any lights lit on the dash , check engine , oil light...etc.. How low was the oil ? If the oil had been very low an you where driving it you could have fried the engine ! Me ,if this car came to my shop I'd pull a plug wire an see if it had spark an if it did I put a fuel presser gauge on an check for fuel ! If it had fuel I'd check compression ! Most usually if low oil were the problem the engine would seas up an would not turn at all. No Start Diagnostic Basics EricTheCarGuy You can watch this to see what is involved in finding out the problem !
ahhhh a diesel, that , is a horse of a different color.
not GAS but oil burner engine.! there is no spark on diesels...
it uses huge compression rates to combust.
1: glow plugs dead. (or its controls)
2: low compression,
3: bad fuel ,old fuel , water in fuel.
4: weak battery. old or weak for any reasons. cranks too slow.
5: if EFI , other complex reasons. direct injection is it?
low compression and I assume you have the reading from a compression check can mean 1 of 3 things---the hydraulic tappets for that cyl are jammed full open so holding the valve open,or there is a broken ring( check by putting some oil --4-6 squirts from an oil can-- and retest compression-- or you have a burnt valve or cracked valve seat. Cheapest is to replace head from wreckers but which ever way you go it will be dollars
the stab light comes on if the battery is low because you are cranking the engine your aj26 v8 engine may have a common problem for cars up to that model/year with worn nicosil coated bores ie. low compression check the vin no. at your jag dealer you can get it started by removing the spark plugs and putting a egg cup of engine oil in to each of the cylinders the first thing to do is to check for fault codes using a obd code reader for a clue followed by a compression test
#1 cylinder not firing, check spark plug, spark plug wire, remove spark plug and use a compression tester, and check the compression of that cylinder. should have at least 65 pounds of compression per cylinder. If the compression is low, you may try shooting a little oil in to that cylinder, replace spark plug, and try running motor again. if the compression is low on said cylinder, could be due to bad piston rings. requiring a motor rebuild.
Remove the plug and check the compression for that cylinder it should be between 120 psi and 150 psi, if it is low it is a mechanical issue (bad valve or worn piston rings). If commpression is low remove the valve cover and turn over the motor confirming that both valves for that cylinder are opening to there correct travel or height if not it is a faulty hydraulic lifter or worn cam. Also check the valve lash clearance the clearance is usually .012" for the exhaust valve and .008" for the intake valve to check the lash turn the motor over until the valve shuts completely for each valve, then use a feeler gauge go no go procedure. Has the wire been replaced for the plug? If this motor has coil on plug type disregard plug wire question.
it sound like your timeing is out 180 drg. pull your disterder and trun 180 . make shore number one pistion is tds on the fire stroke. it allso like your ring are bad or your valve are not closeing all the way. good luck