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Hi Top, If I remember you said the problem started when you changed the plugs! am I correct? I would start from there, did you check the Plug Gaps / leads/ has a leead come away from the lead tip? is there a crack in the tips? are all the puipes for the in-take tight? are they cracked? Crank sensor clean? have you altered the timing?
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Question Author
it was a bit rough before i changed spark plugs, but it was not performing badly, then out of the blue, it just started to get like this, i just bough new coil packs
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You did a service If I can remember? to sort out you problem Top, I would take the car for a compression test that would put your mind at rest that it's not a valve, there might be a valve sticking! does the car Light blue smoke?
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Question Author
thats true, yes had compression test done, all the same at over 190 psi no blue smoke
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I may have said this before Top, fill the car up & put a full tin of RED X in the tank, it will cost you around a fiver & well worth the money, then give the car a motorway blast, If I recall you are in Ireland? so give it a blow on the nearest Duel Carriageway. I use this REDX often, my car is the same, regards the emissions on the MOT Its spot on each time, I don't think after what you have said you have a big prob,its just elimination.
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Question Author
true, i started using the redx again after you mentioned it to me, it would be a lot easier for you to diagnose if i could get you to test drive it, i got a second hand set of coils for 60 see if that will change anything when i receive them
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Hi Top, when you've removed the top cover, in your view you have the pack, check each lead / Pack & fitment that they are in good order with no cracks, you also said that you had replaced ALL the leads & are they in the correct firing order, are all the Plugs / gaps correct? with the cover removed, start the car & remove one lead at a time, is there any difference in the tone of the engine? if not, no valve probs, I'm convinced your problem is within the electrics, have you checked the inlets? I remember you saying that you have replaced the Throttle Valve? Is that right? is that clean / working correctly?
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To add, the coil pack that was on the car, did you get it tested by an Auto Elect to see if it was faulty?
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Question Author
hi twr. the leads would have been on my last car, i didnt have it checked, but i just switched the coils around, even though it still sluggish, the obvious misfiring sound has cut down a little bit
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It appears you are in the right area for the miss fire Tops, if you intend to keep this E46 & if its in good order,to stop the inconvenience of 2ND hand Pack / leads, I would go for new or Guaranteed 2ND hand ones, type in Quarry Motors Sheffield, they are well known regards Good Spares, also type in BMW E46 spares you will find a lot coming up, You are in Ireland are you not? You may have a few within your area, If I can help further, ask.
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Question Author
thanks, i think i can return these if they are not in good working order, at 40 for 6 of them is not bad, hopefully they coils will sort it out, i will let you know how it gets on
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