Second time start!?

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Put the old spark plugs in to see if it's any better.

The new plugs are all correct? Check them if unsure. One could be wrong or damaged!
 
Bad plugs. Pain in the ass to do again but before you do. Pull the leads one at a time with the motor running then you will see which one is causing the misfire. Be careful tho cos they can give a jolt ! Then replace the bad one. Did you change them by removing one lead at a time so there was no chance of getting them mixed up ? Got two wrong on mine and it still felt fine under load. Of you have the long type coil. Make sure you haven't loosened one. Its easy to do.
 
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Thats a good idea not thought of that (Putting new ones back in to see)

Jarvas i changed the plugs one at a time like you say so deffo not mixed up.

Before i put old ones back in im going to try your method.

So when i pull one lead off at a time how will i know which one is the 'bad one'? Is it when the engine runs the same when its off and the rest (The good ones) will make it worse when off?
 
Right Iv just put the old plugs back in (Didnt clean them up so i didnt alter the gap, plus they were running fine before!)

I dont want to jinx it but so far so good! :D

Its not wanting to cut out anymore. There does seem to be a slight misfire, im not sure if it was there before or not.

Here is a pic of the 'NEW' spark plugs (All were the same condition) really blackend up and had only done about 8 miles! :(

Could the missfire now be down to the old plugs as they were real blackened up? Going to change them again anyway!
 

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Put some bpr6e in. That's what's listed. I'm fairly confident that the 7es you had is 1.5 colder running than the 6e that should be in
 
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scott02464 said:
Sorry Jarvas! bpr6e is what i had originally had (Back in) and i got sent the bpr6es

Got them off Ebay, says bpr7es in the pic but got sent bpr6es. The ad says they are good for both the 4.0 and 4.6! Will deffo put the original type in when i re new!
8 x NGK Spark Plugs for P38 V8 Range Rover, 95 to 02 on eBay (end time 11-Jan-11 20:08:48 GMT)

What is the difference between the bpr6e and a bpr7e just out of intrest?
Click to expand...

So you are happy to pay in total £19.25 for 8 plugs. These plugs are less than a quid a piece at motor factors, if your in the trade, a little more if not. But you should get 8 for less than a tenner anywhere.
 
wammers said:
So you are happy to pay in total £19.25 for 8 plugs. These plugs are less than a quid a piece at motor factors, if your in the trade, a little more if not. But you should get 8 for less than a tenner anywhere.
Click to expand...

Eye not the cheapest i know... But the motor spares round here are rip off cooonts, would have to travel out of where i live to get em under a quid!

So it would prob cost relativley the same in plugs+fuel going to buy them....

Would blackened up plugs cause a slight miss fire??
 
scott02464 said:
Eye not the cheapest i know... But the motor spares round here are rip off cooonts, would have to travel out of where i live to get em under a quid!

So it would prob cost relativley the same in plugs+fuel going to buy them....

Would blackened up plugs cause a slight miss fire??
Click to expand...

Yes rich running. Too much fuel, not enough air, one or the other.
 
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