1989 XJ-S 5.3 Engine Stopped
My Engine suddenly stopped while driving last week. I called the AA and the mechanic thought that I had put in diesil fuel as I had filled up 15 minutes before. I emptied the fuel and filled up with unleaded and no joy. I have a marelli digital ignition system. I have renewed The two Sensors,two coils,ignition leads,distributer cap,rotor-arm,spark plugs. I have a new fuel pump and filter and they are working ok. The car was running perfectly until this happened. Is there a way to find out if the Injectors are working as they have not been renewed. Is there a Relay or Fuse that would cause the Engine to stop dead??
I am at a loss as the nearest Jaguar Garage to me is 30 miles. The AA said they would drop the car off for me but I declined as you know what Jaguar could charge. What tests can I try Now?? |
i know you said you replaced all these parts but did you check for spark, fuel pressure, and injector pulse?
also, try replacing the coolant temperature sensor. |
Instead of just replacing parts lets find out what is missing. You need to know if you have spark and fuel.
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why not bridge the coolant sensor and see if it will start. Lols will be had if it does.
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Mmmmm, on the 2 Marelli beast I contact from time to time, one had the same.
Look (hahaha) down the front of the engine, sorta below the oil filler cap, and you will see a small wire loom with a plug connector/joiner. Unplug it, clean the contacts, and see what gives. It is the front crank sensor loom, and that dumb thing killed one car twice, the first time was a challenge to locate the cause, the second was simple obviously. I cannot see the relation to filling with fuel, but who knows. |
1989 XJ-S 5.3 Engine Stopped
I bought a new Coolant temp sensor and installed it yesterday. I also checked both the Flywheel and Crankshaft Sensors (new 1 month ago) and got a reading of approx 660 ohms each. She is turning file and giving a spark but just not firing. I used the fuel pump to empty the fuel into cans and the pump seems to be working fine. I emptied 30 litres of fuel pretty quickly. The pump and filter are only three months old. Maybe it is a problem with the Injectors? I gave up yesterday. I have had enough for a day or two. It is diffucult to get hold of an auto engineer who knows anything about the xjs, even at the Jaguar Garage.
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If you have spark then you are missing fuel. Next step is to see if you have injector pulse. Either buy a noid light, use an LED test light or connect a scope.
Remember just because a part is new does not mean it is good. If you have access to a scope you can check the crank sensors. |
i always check for pulse with a mechanics stethescope.
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i have a 94 xj6 tht wont start i have no pulse at the injectors i was told to get a new ecm i did car still wont fire. help please mising my jaggy
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Originally Posted by 60dodgecars
(Post 538361)
i have a 94 xj6 tht wont start i have no pulse at the injectors i was told to get a new ecm i did car still wont fire. help please mising my jaggy
Your "94 XJ6 is known as an XJ40, so I would strongly suggest reposting this in the XJ40 area, so you get the best, most accurate assistance for your specific car. The XJ-S V12 is very different. |
Just out of left field there is an inertia switch on the drivers A pillar just under the edge of the dash these can give problems and will kill the car.
1. make sure the button in not UP (don't ask how I know this one) 2. if it is on jumper out the switch. |
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