Local garage (Europspec Guildford) have my 1.8 Eunos to try and solve its problems.
Fires up straight away but cant hold tickover, give it some revs and you get 2-3000 max…then the revs drop away to stall.
They have swoped both MAF and CAS to no avail.
What are the symptoms of a faulty coil pack?..
You are more likely to detect a misfire I would expect. this sounds like something else. So what are the fault codes in the ECU (if any?) have you done the basics like replace the fuel filter? I would expect something like CAS or fuel pump failure from your description.
I don’t know if the garage have tried the search for fault codes…on these early ones it seems a bit of an old fasioned way of doing it (what with talk of paper clips and LED’s?!)…as I say they have swoped the CAS to no avail…before I go and buy a coil pack I ideally would want to know if that sounds like it could be the problem…
Grrrrr!
Agree with Strawman re misfire
I think if it was the CAS you would not even get started…but.
I would also go with the cheapest and simplest eliminations with plugs and plug leads.
Also, remove the coilpack and check the contacts inside are not damp or corroded…coilpacks can and do chuck up a variety of kid-on maladies. If you have noticed your tacho jumping recently, this can flag up coilpack issues. The contact between the coilpack and the plug leads has to be dry & tight as a drum otherwise sometimes invisible arcing can result.
A proper OBD check ough to chuck the issue up. If you have the 4 pin coilpack, I can tell you a new one approaches £300.00 posted, but you can get packs for £160.00, take the packs out the chassis provided, and install them in your own bracket in minutes. 2 year G’tee.
I would be wary about used & “tested” Fleabay packs…I’m on my second at the moment and they have both been duff. I’m going the cheap new pack route as mentioned.
So, because it’s old fashioned, they don’t even bother finding out what fault codes there are, they just start replacing components at random until the problem goes away?
Doesn’t seem like good quality diagnosis work to me.
Hmmm…mechanic thinks it could be a faulty ECU now so is looking to see if he can find one to ‘try’…to save my buying un-necessarily…again now I’m not sure what the symptoms of a failed ECU are?
Umm…What? I’m getting a seriously bad feeling about the quality of the work you’re getting for your money.
Seriously try out the ECU fault codes first to see what the ECU thinks is faulty. And if they have changed AMF and CAS have they re-set the ECU fault codes. I would be inclined to say they are not worth using if they do not do the basics. Also you need to check there will be no anti-theft problems with swapping ECU’s. It could be lots of things, but I am not thinking ECU failure is high on the list.
I am not confident your garage know what they are doing. As for high tech, well swaping components blindly is far less high tech than checking the ECU fault status.
Yes I think you guys are right…will give it another week, then look into how much it will cost to tow the car to a MX5 specialist.
Thanks.
Id go with what Victor (above) is telling you first. The code may tell you straight away what the problem is.
If the floor of the car near the ECU is soaking wet and the car is usually parked nose-down it is entirely possible for the ECU to fry itself, this happened to a chap down here last year…
Picked the car up today. It seems the ECU was at fault, the guys at Eurospec(Guildford) noticed it had a label “Repaired” on it. Opened it up and saw a non standard transistor and some burn marks in the area around it.
They bought a second hand one from Ebay fitted it and it fired up and all seems well.
Did you get a refund for the parts they incorrectly fitted?
I paid/sourced for the MAF/CAS so will resell those to recoup my costs.
In fairness to the garage they usually deal with skylines/Scoobies/Evos et al and not MX5’s.
For that reason only I wouldn’t return to the garage and need to find an alternative to the RAC who will take a car to a garage of your choice and not limit you to a 10 mile radius.
If you own an MX5 and live near a specialist your lucky!
Enjoying the car again now!