Question about 2001 Jaguar XJ8

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Finding my ecu

Jaguar xj8 1998 where would i find my ecu as i have bad starting

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The ecu is located under the black plastic cover in the engine bayat the rear on the leftside there are four security screws to remove to get to it.  But why, itwould not be my first choice   good luck rod

Posted on Jan 08, 2009

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Posted on Jan 02, 2017

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Jaguar xj sport 3.2 no spark or injector pulse


If ECU has crank signal and engine turns over, ECU should give injectors a pulse and trigger the ignition. If not ECU might be bad. You should check power and grounds going to ECU. There are usually multiple power and grounds going into ECU

Jan 06, 2014 | Cars & Trucks

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My xj6 jaguar has a code fuel 44 set and now it will not start. a couple of time before in the morning, it would start but run poorly would not take gas . let it run for a few seconds and it clears up but...


First...Check th cold start injector.

If the E.C.U. is faulty it is possible that injectors will be inopeative. The E.C.U. may also be responable for any degree of icorrect fueling. Before suspecting the E.C.U. for fueling problems, however, all other likely components should be proven good.

May 24, 2011 | 1993 Jaguar XJ6

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I have a 2001 jaguar s type 3.0 liter and i replaced the ecu module and the vehicle doesnt start . is there any setting or resetting i have to do fo it to start thanks


First thing to determine is if your ecu module ,has the same hardware,software references as your original ecu.If this is the case,and you havent changed anything else,like keys or ignition switch or immobilizer,then it should start!
If ecu doest have same references,you need to have it coded by the dealer,so that it works with your immobilizer.

Mar 05, 2011 | 2001 Jaguar S-Type

2 Answers

How to unlock a locked engine on a jaguar S type


please explain what you mean by a locked engine as the reason i can think of is its seized or the chain has broke or the engine is hydraulic locked

Oct 27, 2010 | Jaguar S-Type Cars & Trucks

1 Answer

Codes 303 and 353 was found on 2002 jaguar, does this mean that the coil on #3 cylinder is bad?


P0303 Means miss cyl no3
P0533Means suspect coil and or ecu failure (check coil to ecu wiring before replacing ecu)

Oct 23, 2010 | 2002 Jaguar X-Type

2 Answers

Hi. My Jag head lights have started this blinking thing. As I am driving they will blink for no apparent reason. There doesn't appear to be anything going on otherwise. Any ideas where to start?


I had an S-Type too, I found this blinking when battery charge was low. So my opinion is something wrong with charging, you have to check battery contacts, measure battery voltage and check alternator. A possible case, contact problem at ECU. THe ECU under the house of pollen filter at engine end. You need some car mechanic ambition to remove the house of pollen filter and to clean ECU connectors with contact cleaner spray.
Of course this is just my experience, no guarantee, this works at you.

Aug 21, 2010 | 2000 Jaguar S-Type

1 Answer

Bad starting


Hi colin think you might have low compresions at this age of v8, try a search on: nickisil jag engines:  

Jan 08, 2009 | 2000 Jaguar S-Type

1 Answer

Starting problems at times


The ECU is the computer that, among other things controls electronic fuel injection on your jaguar (great cars).
To test the ecu you need equipment that is not normally for sale for home repairers.
You need to go to a garage, they will connect a flow meter to your engine and computer machine to your electronic board.
Here is something about ECU testing, just for general knowledge information.

Here you can buy replacement ECU, ECM and ECC and check spare price, just in case.

Jul 17, 2008 | 1995 Jaguar XJ6

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