Question about 1986 Jaguar XJSC

Open Question

I have a 1991 (facelift) Jaguar XJS V12 with a fault: FF44, which comes up once the engine is at normal operating temperature. It is usually accompanied by a strong smell of petrol and the engine idles slightly less smoothly than before. Any ideas where to look first? I am a competent DIY mechanic. Cheers. TC

Posted by on

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My 1991 XJS V12 has been sitting for 9 months low fuel, added fuel and tried starting, it turns over fine but does not fire, is there a way to check the fuel pump or if gas is getting to the engine?


first check for a spark thats more than likely ok. the most poss cause is the fuel pump. on the the fuel rail there is a pressure test point like a tire valve. connect a pressure test gauge and crank the engine you should get about 28 -36 psi if not the pump is more than likely stuck, try giving the fuel tank bang with your fist with someone cranking the engine remove spare wheel and trim board for access most likely the moisture in the remaining fuel has corroded the pump, good luck

Sep 16, 2016 | 1991 Jaguar XJS

1 Answer

Qhere do i find the coolant temp sensor an the map swnsor


Jaguar Sensor, XJ6, XJ8, XJS, XK8, S-TYPE, X-TYPE, XJ40 ...

www.jagbits.com/jaguarsensor.php
FITS: 1993-1994 6.0 XJ12 AND 1989-1993 V12 XJS FROM VIN 157118 ON, 1994-1996 6.0 V12 XJS FRONT DAMPER .... LNA1622AA - MAP SENSOR ... C42166-USED - USED SENSOR COOLANT TEMPERATURE FOR FUEL INJECTION

Sep 25, 2015 | Cars & Trucks

1 Answer

Why does idle speed surge?


Thread: 6.0 V12 XJS High RPM When Warm - Jaguar Forum.co.uk

www.jaguarforum.com/showthread.php?t=54266
Mar 3, 2013 - I recently bought a 1993 6.0 V12 XJS and when it is started from cold it runs ... to 1300 RPM so it wants to surge forward when braking which is strange. ...Classics ยท XJS 3.6,4.0,5.3 & 6.0; 6.0 V12 XJS High RPM When Warm ... You might want to adjust the aux (extra) air valve to bring the idle speed down.

Sep 25, 2015 | 1989 Jaguar XJS 5.3

1 Answer

Jaguar xjs 1995 v12 engine lack of power


I would start with a tune up, then isolate any symptoms other than lack of power if it persists, like rough idle, sputtering, jerking, engine trouble codes, etc.

Jul 30, 2014 | 1995 Jaguar XJS

1 Answer

Where is the low freoswitch located on an 89 xjs v12 engine and how do you change it


normally the low pressure switch on the ac system will work when there is sufficient gas replace in the system.

Jun 06, 2014 | 1986 Jaguar XJSC

1 Answer

No oil pressure what so ever in v12 jaguar


have you tried reversing the pipes and see if that makes any difference other than that there must be a pressure difference between the two pumps try priming the filter with oil before starting.

Mar 27, 2009 | 1986 Jaguar XJSC

1 Answer

1989 jaguar xjs v12 fuel mixture


Chances are the coolant temperature sensor or its wiring have failed, or the vacuum line to the MAP sensor is leaky or broken (I believe the V12 in '89 guise uses MAP sensors). The MAP sensor measures Manifold Absolute Pressure. Along with this pressure the ECU looks at engine RPM. It also measures air temperature. Knowing pressure and temperature we know density, and knowing engine speed tells us how much volume of air is going through the engine. All of this together is computed into air mass and is used to calculate how much fuel mass should be admitted. If the vacuum line is broken, the ECU reads less vacuum and produces rich mixture thinking that the engine is under high load.

Aug 03, 2008 | 1986 Jaguar XJSC

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

222 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jaguar Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

yadayada
yadayada

Level 3 Expert

75197 Answers

SPEEDY CAR WORK SHOP...

Level 2 Expert

489 Answers

Are you a Jaguar Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...