TPS???
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All back together now, but unfortunately the original problem is still showing up :(
Drove for about 10 miles and stopped for a few minutes then revs started jumping around. Erractic to accelerate until approx 3000 revs then smooths out a bit. Held foot on pedal around 1500 revs and the car is juddering.
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CHECK THE PLASTIC PARTS OF THE HT LEADS THAT GO INTO THE BLOCK, A SMALL CRACK CAN CAUSE THAT TOO
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Changed the ht leads for another second hand set, still no joy.
Found a receipt for a distributor that was fitted a few months before I bought the car, so changing the ignition coil and the hassle of putting it back together was probably not needed :x could have kicked myself.
Looked at plugs - Denso K16TT so probably OK, got proviso on the exhaust at MOT could it be this?
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Hi dazse,
I'd still be looking at dissy mate?
at fail supect No2!!!! the ignition module! (the thing your rotating vanes were rubbing against)Looking at your pics it appears you have the 'strap type' coil to ignition module connection?
You don't mention what year/spec your MX3 is but Id guess you have a later style dissy as mentioned in all the 'USA' external HEI coil conversions?You'd have to check the 'TOT*****' number on your dissy body to make sure that the receipt you found for the dissy replacement, is indeed the correct spec for your cars year/spec ? (think theres about 4 'TOT*****' numbers across the range?) (was it brand new?)
You have Two options with ignition module,
Probestore stock them all (approx £75)
Go down the external coil, HEI mod route? (Enter a search on here with the word 'HEI' and on MX3.com)
I'd like to do the HEI conversion but I have the 'spade' type coil/ignition module connection and the wiring diagrams by members who have completed the mod appear conflicting for my set up??
NOT SAYING its THIS for deffo, but I had exactly same symtoms!!!…. swapped whole dissy for a known, good, used unit (off my 2nd scrapped MX3) and without touching anything the car was transformed
:PHope this helps a little?
kev b.
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A quick update, through the summer I have replaced the following parts: HT Leads, Distributor cap, rotor, ignition coil, spark plugs but still no joy. I have checked for air intake cracks. Throttle position sensor has been setup.
Local garage had a quick look for me and can't see anything for sure just suggested some of the above. Did say may be head gasket and I could get a test done on it.
Might have isolated it to cylinders 4 or 6, in that when it is not revving constsistantly and you pull the lead from these cylinders in turn the engine does not get worse.
Any last suggestion before I have a head gasket check. Of course money is a bit tight and I would love to change the whole distributor for either a known working one or a second hand one from a good source so I know its 100% but from my parts list above most of the distributor has been done!
Cheers guys for you help so far…
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Hi, I'd still be looking at ignition side/electrical components etc as head gasket failure would be apparent on a cold engine? as in your original post, you mention the problem appears after some 'stick' (and hence heat) and is then fine the following day until warms up again?.
Have you reset ECU and started car with TEN and GND jumped after 'ALL' of your above component swaps? and done a code pull?Kev B.
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I need a working distributor for my MX3 V6, firing order 4,5,3,2,1,6 (clockwise). I have had the car in three garages now the last one being an ex mazda technician and no one can pin point what it is.
Mazda man says it could be the distributor but I have changed so far the ignition coil, cap, rotor arm, also ht leads spark plugs and crank sensor.
I am based in Oxford and will to travel a bit to pick one up so please let me know if anyone can help.
(please see previous page for history of this problem)
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Hi dazse,
So as mentioned at the bottom of the other page, try to pull codes from ecu, this might tell you there's an issue somewhere.
Secondly, its a long shot but have you checked the vacuum lines? I had an issue with a weird idle some time ago and it was down to a bad hose.
Jono
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strongly recommended
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The mechanic at the first garage did say he tried the codes but nothing was showing. I'm gonna get the car back later this week and will try it myself to make sure.
When its back I'll double check for splits in the pipes etc but its now been to three different mechanics and I would have hoped they could have sorted it by now!
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Is there anyway you can get the car to Banbury ?
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I got it back to Oxford from Bicester and the problem started to show up so it may make it to Banbury if I take it easy.
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You are welcome to bring it to mine in Banbury Sunday after lunch and we can try to get to the bottom it if you like. I have plenty of spare parts here too.
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Hi MasonX3, thanks for the offer, I have tried to pm and email but neither seem to be getting through. The offer sounds good, I have been buying spares bit by bit and its getting expensive! If you can let me have your address then I would like to pop over Sunday, many thanks.
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Just pulled the codes and there are no codes showing, the led lit for a second or two when the ignition was switched to on but went off after that.
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Cracked it! Ignition Module in the distributer was failing when hot.
Thanks to all those who have contributed ideas and I do believe the ignition module was mentioned as a fix (blackmexyv6) but trying to get them is near impossible for the early distributors. Money is a bit short otherwise a new distributor would have sorted it straight away but hey I have learned a lot with this one - thanks again.
