Ignition Coils???
#1
Ignition Coils???
Hi,
I broke down on Thursday night, (M11!!) the RAC guy diagnosed the problem as the ignition coils, possibly thre or four were knackered. The car started to play up on the motorway, no power, mis firing and eventually stalled, I managed to get it to the service station, it starts, just, and then sounds and feels like a bag of ball bearings and then stalls, if you rev it high it hives the same reaklly bad uneven running, sounds eally bad. As I mentioned at the beginning, The RAC guy said it was the coils, question is, is it the coils and secondly before I spend a fortune, how do you test the coils?
Many thanks
Nic
I broke down on Thursday night, (M11!!) the RAC guy diagnosed the problem as the ignition coils, possibly thre or four were knackered. The car started to play up on the motorway, no power, mis firing and eventually stalled, I managed to get it to the service station, it starts, just, and then sounds and feels like a bag of ball bearings and then stalls, if you rev it high it hives the same reaklly bad uneven running, sounds eally bad. As I mentioned at the beginning, The RAC guy said it was the coils, question is, is it the coils and secondly before I spend a fortune, how do you test the coils?
Many thanks
Nic
#2
There is a device, I've seen advertised, designed to test ign. coils on the car. It is supposedly available in auto parts/speciality stores. I saw it demonstraded on a tv show with glowing comments. It was not expensive.
I have never seen or used it but I always thought if I had a problem like yours that would be an approach to a fix.
KBO mate.
I have never seen or used it but I always thought if I had a problem like yours that would be an approach to a fix.
KBO mate.
#4
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#7
It helps to know what year, model and engine that you have.
It is always best to start with a tune-up, so the new plugs won't hurt. Get a tube of Never-Seize and put a little onto the threads of the spark plugs before installing the plugs. Before removing the plugs, look and see if there are carbon tracks on the sides of the plugs. You may need new rubbers to keep the sides of the plugs clean.
Check the air cleaner too.
I agree that there may be something else going on under the bonnet, but simple stuff first.
It is always best to start with a tune-up, so the new plugs won't hurt. Get a tube of Never-Seize and put a little onto the threads of the spark plugs before installing the plugs. Before removing the plugs, look and see if there are carbon tracks on the sides of the plugs. You may need new rubbers to keep the sides of the plugs clean.
Check the air cleaner too.
I agree that there may be something else going on under the bonnet, but simple stuff first.
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#8
#9
Nic,
The diagnosis you got from thr RAC person? Was it a casual observation or the result of some checks?
Something tells me we could be "barking up the wrong tree" here. You need to pull the codes before you tear into the engine.
As Red Skelton used to say "It just don't look right to me boy"
The diagnosis you got from thr RAC person? Was it a casual observation or the result of some checks?
Something tells me we could be "barking up the wrong tree" here. You need to pull the codes before you tear into the engine.
As Red Skelton used to say "It just don't look right to me boy"
#11
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#15
Thanks to everybody that posted replies etc, the RAC (Breakdown guy) diagnosed that it was possibly 3 or 4 coils gone as it sounded so bad, no codes when he connected his device.
I removed and replaced all 8 spark plugs yesterday, a bit of a pain as it also runs on LPG, started first time and sounds and runs great again. All of the plugs were black and sooted up, a couple were corroded and one the ceramic was cracked and broken. Fingers crossed it is now ok.
Once again thanks for replies.
Car is a Jaguar XKR 1998 4.0ltr supercharged.
Regards
Nic
I removed and replaced all 8 spark plugs yesterday, a bit of a pain as it also runs on LPG, started first time and sounds and runs great again. All of the plugs were black and sooted up, a couple were corroded and one the ceramic was cracked and broken. Fingers crossed it is now ok.
Once again thanks for replies.
Car is a Jaguar XKR 1998 4.0ltr supercharged.
Regards
Nic
#16
Car is a Jaguar XKR 1998 4.0ltr supercharged.
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