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Author Topic: Misfire and/or violent judder  (Read 1729 times)

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gwa

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Re: Misfire and/or violent judder
« Reply #15 on: 03 September 2008, 11:10:46 »

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Hmmm....I would be checking the condition of the coil packs and looking for cracks/corrosion around the iron cores.

Morning Mark, had presumed that would have been visible when he checked the wells for oil?  any signs gwa? :-/

Nope; Wells were mostly dry [maybe just a smear] and everything looked OK. I'm not sure what iron cores are though....  
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feeutfo

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Re: Misfire and/or violent judder
« Reply #16 on: 03 September 2008, 12:57:08 »

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Hmmm....I would be checking the condition of the coil packs and looking for cracks/corrosion around the iron cores.

Morning Mark, had presumed that would have been visible when he checked the wells for oil?  any signs gwa? :-/

Nope; Wells were mostly dry [maybe just a smear] and everything looked OK. I'm not sure what iron cores are though....  
Sorry, poor English in my post. I was refering to the coil packs, "any signs"of cracks or damage on the coil packs. The 3 plug unit on each bank of cylinders you have to take out to look in the plug wells.  Any cracks or damage on the coil pack may well cause a missfire. If you have to take them out again, easy way is to find 2 suitable bolt to screw into the brass fixing hole and pull on the bolts instead of leavering out from the edge and risking any possible damage.
 

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gwa

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Re: Misfire and/or violent judder
« Reply #17 on: 03 September 2008, 13:06:08 »

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Hmmm....I would be checking the condition of the coil packs and looking for cracks/corrosion around the iron cores.

Morning Mark, had presumed that would have been visible when he checked the wells for oil?  any signs gwa? :-/

Nope; Wells were mostly dry [maybe just a smear] and everything looked OK. I'm not sure what iron cores are though....  
Sorry, poor English in my post. I was refering to the coil packs, "any signs"of cracks or damage on the coil packs. The 3 plug unit on each bank of cylinders you have to take out to look in the plug wells.  Any cracks or damage on the coil pack may well cause a missfire. If you have to take them out again, easy way is to find 2 suitable bolt to screw into the brass fixing hole and pull on the bolts instead of leavering out from the edge and risking any possible damage.
 

Ah, thanks for the explanation, when I don't understand something it usually costs a lot!! Anyway, my local garage blokey looked and said they were OK but maybe starting to 'break down'. So I think the the actions will be:
1 Ask TheBoy to clear out all the codes
2 Run it for some days and see what happens
3 Order up the crank sensor & coil packs
4 Find someone sensible to fit them
5 React to whatever is found from 1 & 2

Any other suggestions welcome. Cheers
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feeutfo

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Re: Misfire and/or violent judder
« Reply #18 on: 03 September 2008, 13:30:00 »

may be c sensor, may be coil packs, may be  a number of things. You need to get a diagnosis first as you say. THEN go and spend your money. I only suggested blindly buying a crank sensor for the safety issue. It can be quite expensive throwing parts at a car with out being certain that will cure it.
Hopefuly The Boy will have time to sort you out. Hes a very busy guy, how he does what he does is beyond me.
It is the lack of a missfire code in the pedal test the is baffling most of us. This suggests the coil packs are ok. The symptoms tho, suggest other wise. Hence the need for tech 2 diagnostic. At least thats how i understand it anyway. Maybe do the pedal trick again and make sure the sequence runs its full course. That code makes no sense to me. Anyone?

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gwa

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Re: Misfire and/or violent judder
« Reply #19 on: 03 September 2008, 13:59:13 »

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may be c sensor, may be coil packs, may be  a number of things. You need to get a diagnosis first as you say. THEN go and spend your money. I only suggested blindly buying a crank sensor for the safety issue. It can be quite expensive throwing parts at a car with out being certain that will cure it.
Hopefuly The Boy will have time to sort you out. Hes a very busy guy, how he does what he does is beyond me.
It is the lack of a missfire code in the pedal test the is baffling most of us. This suggests the coil packs are ok. The symptoms tho, suggest other wise. Hence the need for tech 2 diagnostic. At least thats how i understand it anyway. Maybe do the pedal trick again and make sure the sequence runs its full course. That code makes no sense to me. Anyone?

OK, ta. I understand. I'll take it out tonight for a 10mile run and read codes when I get home, then post them.

So for a 'thicky' will these codes get overwritten by a new fault when it occurs and the last code I posted up was the last fault registered?[hope that sounds right].
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feeutfo

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Re: Misfire and/or violent judder
« Reply #20 on: 03 September 2008, 15:41:24 »

you aint a thicky make. We all started some where. You should get, if more than one code, a list of numbers. Flashed in a sequence, 4 numbers, gap, 4 numbers gap, and so on. Have a look at the video in the paper clip test guide(also includes the pedal trick) in the maintenance section. When the fault occured is not covered. Its either there or it isnt.
See how you go.
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