Intermittent starting issue

Sounds like you may have a fuel injector that is leaking. Can you confirm the shops fuel pressure readings after the engine is turned off. The pressure should not drop or drop very slowly over a lengthy time period.

Hi my car was running perfectly fine this morning on the way to work and at the end of my work day the car just would not start, i checked all fuses and relays and they are all fine, the car cranks and turns strong, but just wont start. I am located in NYC it was 50 degrees today i don't know if that contributed. My mechanic came by with his scanner and could not read the ecu, which was strange because we had used that device a few weeks ago to diagnose my check engine light which showed po430 which was already resolved. I had no check engine light since, however he removed the intake hose and sprayed starting fluid into the intake and the car fired up, and i was able to make it home, wanted to run to the store and ofcocarse car wont start. Car was recently tuned up, and all ignition coil packs were replaced, i had put in Lucas injector cleaner today. I don't know what else to do, could it be my fuel pump and if yes where is it located. Please advise cant afford to miss work.

Could be the cold contributing to the problem. My advise is to check the fuel pressure if its within specs start here.

Pressure is good any other ideas?

What is the fuel pressure readings?

Sure the reading was 30 PSI.

Your pressure is low-book says its suppose to be 43.5 psi

So should i have the fuel pump replaced?

Electrical problem
2000 Jaguar S-Type V8 Two Wheel Drive Automatic

just purchased an s type which is non starter,batery flat when bought,was recovered from a finance company withn no keys ,there is keys with it but look as if they have been cutwould there be a chip in the original keys or not and is that possibly why it wont start, is there a way to check ,should led light be off or flashing on centre dash? any advice wuld be appreciated .also central locking inop and electric windows inop front stuck half way.
is common for engine to lock on starting sometimes sounds seized

The passive anti-theft system (PATS) is a feature to prevent the vehicle from being driven away by an unauthorized person. The PATS system consists of electronically coded keys, a transceiver device and a control module. When the ignition is switched to position II, the transceiver energizes the ignition key to read it's electronic code that is transmitted back. If the code read equals a code stored in the control module, the powertrain control module (PCM) will let the engine start. Otherwise, starting of the engine is disabled (through the starter disable relay and the PCM).
A PATS indicator LED provides the driver with the status of the PATS system. The light will flash when the ignition is switched OFF. The PATS light will illuminate when the key is inserted into the ignition lock and will stay illuminated until the system has carried out it's test on the key. If there is a fault with the PATS system the LED will flash a error code.

Check again and verify the fuel pressure-did you check the fuel filter? if so and still the same could also be an injector or fuel pressure regulator leaking and dropping the pressure

Ok i i will check the pressure again, should this be done using the the handheld scanner or should i use a manual gauge on the fuel line? If it was an injector would my check engine light be on and if its is the pressure regulator where is that located?

Electrical problem
2000 Jaguar S-Type V8

Why once in a while my car doesn't start ?

When it doesn't start, is the PATS light on the top of the dash blinking rapidly? Also, check in the boot near the battery for a two pin connector dangling down. Possibly corroded or in some cases laying in water that has accumulated passed the boot seal.

The car turns off and will not start ,wait 20 minutes and then turns on say on dash fuel system data error how can i repair

may be a fuel pump problem, check the fuel pressure first.

i have a 2000 jaguar 4.0 s-type recently i drove my car about 10-20 miles roundtrip parked it and came out 10mins. l8tr tried to start it and it seemed strange that i had to push the pedal to start it revved it and heard a popping sound shut it down couldn't figure what was wrong so i pulled the valve covers and found out the secondary chain snapped. My question now is how can i find out if i bent a valve without removing the head i took a camera and looked at the pistons in each cylinder and they look fine i took a breaker bar and a socket and turned engine with no problem i can't check for compression because i haven't replaced secondary chain and tensioner yet any feedback thanks oh and the popping noise was the broken chain cracked a hole in the valve cover can that be repaired or should i replace that as well thanks again..."desperate for diagnosis"

A cylinder leakage test will identify a leaking valve but you'll have to turn the camshaft by hand. Normally the piston is placed at exactly top dead center on the compression stroke but that's only to make the valves closed, (and so the piston won't move down), but the position of the piston is irrelevant. You pump in compressed air through the tool which includes a regulator to limit the air to about 30 psi, then you listen four places for air hissing out.

Air at the tail pipe means a leaking exhaust valve. At the throttle body means a leaking intake valve. At the dipstick tube or oil cap means leaking rings. Bubbles in the radiator indicates a leaking head gasket or cracked head.

You do that test to each cylinder one at a time. You can expect more leakage than normal past the piston rings because the engine is cold and the piston will have likely moved down in the bore. You're only concerned with the valves. If any are bent, you'll know by the sound of the escaping air.

my 2000 s type jag won't start low voltage at feul pump

Check the fuel pump relay. Make sure it has 12V there. If it does, follow the power supply to the pump. Chances are there is a broken or corroded wire.

Dear Ken,

Good Day,

Well, the Jaguar car is running in perfect condition, locking and unlocking as it should be and the engine starts immediately and I am very happy with it, no security issues anymore.

By the way, do you have any idea in Mercedes Benz, I actually own another car it is 2001 Mercedes Benz S600 W220, recently the a new Battery replaced but it gets drained quickly within one day, I have checked the alternator voltage it was 13.8, once I do jump for the battery the car runs immediately and next day the battery again drained.

So hope we can solve this issue too, thanks.

Ramzi

Hi Ramzi,

Please start a new question. Please post your new question here, you must be logged in.

https://www.2carpros.com/questions/new

Cheers, Ken