Question about 2001 Jaguar XJ8

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2001 XJ8 #1 cylinder misfire

Oil clear, new plugs, coils good, injectors good, didn't jump timing

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  • Contributor
  • 28 Answers

I would start by checking to see if the signal is being pulsed to the coil and/or the injector. If those are good, check the compression.

Posted on Dec 26, 2013

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Posted on Jan 02, 2017

  • 9 Answers

SOURCE: 2001 jaguar s-type 4.0 oil in spark plug area

Hi bravo956
i also have the same problem regarding the oil leak. this is due to the spark plug gasket leaking and you will need to replace them. they are circular gaskets about 1.5 inches across that fit to the underside of the rocker covers and prevent oil from seeping down the long spark plug hole. when i investigated my leak i assumed it was just the rocker cover gasket that was leaking but once everything was removed it is obvious.

Posted on Jan 12, 2009

  • 740 Answers

SOURCE: ONE CYLINDER MISFIRING

No you don't have to drain the oil, however if there is oil down where plugs are then that may be the reason for the misfire the oil blocking the spark or may actually be the cause of the coil going bad. You have another problem that needs to be taken care of if not you will have the same problem again soon. You need to change the oil seals in valve cover gasket and valve gasket to stop oil from getting on plugs.Good Luck and thanks for using FIX YA

Posted on Jan 22, 2009

csmock132
  • 4669 Answers

SOURCE: 85 xj6 4.2lt. fuel injected, (Problem will not

Does it even try. (cough and sput) Will it start if you spray carb cleaner in it?

Posted on Mar 12, 2009

michigan man
  • 3533 Answers

SOURCE: cylinder 8 misfire, restricted performance is also coming on

you may have to replace the cowl pack itself that sit on top of the spark plug and sometimes you can get by just changing the boot wish you the best of luck Michigan Man.

Posted on Dec 06, 2009

johnjohn2
  • 5763 Answers

SOURCE: 2001 Jaguar S Type that has a #6 cylinder misfire

The oil may be causing the misfire,you will need to replace the valve cover gasket and sparkplug tube seals, the oil leaks in from the tube seals,also make sure to clean hole out after the repair and make sure the coil is still good, you may have to replace the coil boot if its soaked with oil,

Posted on Jun 02, 2010

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3 Answers

What am I doing wrong? Cylinder 2 misfire will not go away. Tried everything. Even stumped a mechanic.


have a compression test done and look for a moving valve seat insert
it gives the knock, misfire
as it is no 2 cylinder it is mechanical because you have moved the injectors and coils , plugs and leads and it stays at no 2 cylinder
If you want clean engine oil then change the synthetic oil out and put in diesel oil 20w40
It will not harm the engine as it is the same as petrol oil but with more additives than petrol oil
it is cheaper and has heavy detergent properties that keeps the engine internals clean
from the gunk in the sump ,it is clear that changing engine oil on a regular basis is something you don't do but if you want a reliable long lasting engine , it is must do number 1

Oct 22, 2015 | Cars & Trucks

2 Answers

Multiple misfire


Hi Jason:
A Random/Multiple Cylinder Misfire Detected unfortunately doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.

A code Random/Multiple Cylinder Misfire Detected may mean that one or more of the following has happened:
Faulty spark plugs or wires
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector(s)
Burned exhaust valve
Faulty catalytic converter(s)
Stuck/blocked EGR valve / passages
Faulty camshaft position sensor
Defective computer

Possible Solutions:
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Feb 26, 2012 | 2001 Pontiac Grand Am SE

2 Answers

How much is timing belt for 2001 lincoln ls


simply swap out one injector for another (I simply say if you there already just replace the injector...its a possibility that it is a bad or plugged up fuel injector. on number 4 cylinder. if spark and fuel are ok, its the injector doing this. good-day !

Dec 18, 2011 | 2001 Lincoln LS

1 Answer

What causes misfire in #1 cylinder


A failed fuel injector will do it also. Compare the injector coil resistance with that of another injector. If it's open or significantly different, the injector coil is bad. The injector could also have a mechanical problem such as a clog.

Nov 14, 2011 | Cars & Trucks

1 Answer

P0202 and p0302....new plugs, checked and compared all fuel injectors for resistance and voltage


202 Injector problem #cylinder 302 misfire #2 cylinder bad fuel injector, wiring going to it. Your PCM could be bad I don't think so Check coil on # 2 firing. Check # 2 plug make sure gap didn't close when you put it in. Bad injector or Coil or plug

Oct 11, 2011 | 2005 Chrysler Pacifica

2 Answers

My 2001 Chevy Silverado just got a newly rebuilt ******. The day i got the truck back the check engine light came on. I took back to mechanic and he ran the code. It said misfire and that truck was running...


did the code set for multiple/random misfire or did it set for a particular cylinder or cylinders?if it is random or multiple misfire you may want to check the fuel pressure and volume and for a vacuum leak. if it is a particular cylinder or cylinders then check your coils and also the compression to make sure the engine rebuild is good and something didn't go wrong.

Aug 12, 2011 | 2001 Chevrolet Silverado 1500

1 Answer

I have a 1996 ford contour i get the 304 code mice fire on cyl 4. i changed the plugs and the coil and they wires look good but the car is still sputtering and it back fired once. any ideas?


If you changed the plug, wire and coil and it didn't clear the misfire, then I would look at the injector. try switching it with another and see if the misfire code moves to the cylinder that you put the suspect injector in.

Jun 18, 2011 | Ford Contour Cars & Trucks

1 Answer

Misfire cylinder 6... 4.0L jag s type 2000


MISFIRE ON CYLINDER 6 COULD BE FAULTY SPARK PLUG OR BAD IGNITION COIL OVER THE SPARK PLUG,YOU COULD HAVE HAVE CLOGGED FUEL INJECTOR.CLEAN ALL FUEL INJECTORS USING A CAN OF SEAFOAM TO 3/4 TO FULL TANK OF GAS SEE IF NUMBER 6 MISFIRE CLEAR UP, IF NOT COIL OR FUEL INJECTOR COULD BE AT FAULT.ALSO CHANGE 6 SPARK PLUG FIRST.BEFORE BUYING NEW COIL OR FUEL INJECTOR THAT WAY YOU KNOW PLUG NOT THE PROBLEM.

Apr 11, 2011 | 2000 Jaguar S-Type

1 Answer

2001 Dodge Caravan Check Engine Light wont go away


i would try a coil pack maybe you got a bad one . did you clear the code after you changed the parts . disconnect the batt for ten sec

Oct 20, 2009 | 2001 Dodge Caravan

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