Question about 2002 Land Rover Range Rover

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I am getting a misfire in cylinder 8 of my 2002 range rover 4.6, what seems to be the problem

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 5 Answers

SOURCE: Range Rover 1990 abs pump

Ok, your light WILL go out, and go back to normal once repaired, so don't fret.

Unless the pump was really loud (bad internals), you likely burned up the pressure switch (green thing on end of pump), which can be purchased in LA, USA; or through me, GreenDog Oregon (store name on Ebay US). These go out due to the pump running for an extended peroid of time, overheating the entire assembly, and allowing moisture into the pressure switch (Yes, they do go bad, and I have pictures of the inside of a bad one, full of brown muck). The reason this happens is bacause the nitrogen charge in the ABS accumulator (ball like canister attached to pump) has a limited life-span, and goes bad after about 7 years (Rave 2003). This means that the pump must run more often to accomidate braking, as it has no assist.

So, you can replace the Accumulator, and the pressure switch, and will likely be back in commission, after a proper bleeding, of course (directions for proper bleeding in Rave 2003 -CD available on ebay for appx $5)

Or, you could just replace the entire assy with a nkown good used part, and since the switch on the used part will likely be good, you can then just replace the ABS accumulator. The pressure switch is very hard to find, but I do have a couple of sources, here on the West Coast.

If you need further assistance or need a pressure switch (or parts), contact me through my ebay store, GreenDog Oregon. If you have trouble finding my store, just look for P38 and Classic parts, I'll be near the top of the store listings, as my prices are low, due to the low cost of rovers in the NW.

Posted on Oct 04, 2008

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podbot999
  • 20 Answers

SOURCE: #4 CYLINDER MISFIRE

Hi the most likely fault would probably be head gasket, it maywell show no other signs of fault as it can blow into next cylinder.
Have a compression test carryed out and all 8 cylinders should be within 10% of each other.

Posted on Feb 08, 2009

roedmondson
  • 68 Answers

SOURCE: 2000 CIVIC System too lean Cylinder 3 and 4 misfire Deteced

  1. P0171: This means that the oxygen sensor has detected a lean air-fuel ratio. This can be caused due to a vaccuum leak or a problem in the HO2S circuit or the HO2S (Heated Oxygen Sensor) itself. (Bank one Sensor one). This is commonly located along the exhaust pipe. It could also be a bad Mass Air Flow sensor or a bad Engine Coolant Temperature sensor. Diagnostic checks will be needed to be carried out to be verified though
  2. Well as for the other codes, it means #3&4 cylinders are misfiring. It is a possibility that the P0171 code mite have caused the others to show up. I can be wrong though. But it is a strong possibility. If the air fuel mixtue is too lean indeed, mis-firing will occur, unless it is an actual electronic and not a mechnical problem. By the way, when these codes appear, how is the engine's performance. Does it remain the same or behaves poorly?

Posted on Feb 14, 2009

Lloyd Six
  • 560 Answers

SOURCE: po308 code misfire #8 cylinder. How to fix?

Seems you may have answered your own question.

P0308 will normally be a coil failure but can also be a compression fault caused by a sticky lifter etc or a faulty, incorrectly gapped spark plug

It most likely be the coil but check the spark plug and run a compression test if you have the equipment, all bores should have equal PSi readings.

Or you could try moving the coil in cyl. 8 to see if the code moves to a different P030* code

Posted on Dec 06, 2009

Testimonial: "Just the answers I was looking for. Thanks."

ZJLimited
  • 17970 Answers

SOURCE: P0308 cylinder 8 misfire detected? How to repair?

Fuel injector cleaner commonly has a low success rate, and will not help if it's more than one cylinder that is missfiring. The fact that you have a "rattle" noise, leads me to beleive the engine is not receiving fuel on one or more cylidners. If it is all the cylinders, than the fuel pump may be the culprit, or the fuel pump circuit. But if only one cylidner is missfiring than it is a possibly an injector. A code P0300 refers to all cylinder missfires, and any code between P0301-P0308 distinugiushes a particular cylinder.

Misfiring
1- a general electrical tune-up (spark plugs, wire set, cap & rotor) is a basic start to cure this issue. Wiggle the dist shaft while you are in there, if you have one.
2- Then a good carbon cleaning / throttle-body cleaning.
3- Vacuum leaks at any of the hoses that connect to the Intake manifold; especially the MAP sensor connection.
4- If that does not help then the O2 sensor could be bad or drifting.
5- Funky coil/coil-packs
6- Theoretically a microsecond glitch in either the cam or crank shaft sensors would cause this, but I am not aware of this as a typical cause.
7- Lastly a funky PCM but again it is not common for this to cause miss-firing.

Note for the V8 then also:
a) bad erg valve (this dilutes the combustion gases and hence raises the combustion temp
b) a leaky plenum/Intake manifold gasket. Leaking Intake gasket symptoms

Also can check the TSB 18-48-98 Ignition System Cross Fire/Secondary Ignition Wire Induction (Complete Version )

Hope help with this (remember rated this). Good luck and have a nice day.

Posted on Mar 05, 2010

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Hi there:

Cylinders (front to rear) -
Left bank 1-3-5-7
Right bank 2-4-6-8

(right side coil pack)
Position 1=cylinder 6
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7_24_2012_1_06_18_am.gif


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.

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