S-Coupe Turbo(UK) misfire help needed
Hi
I have a 1995 model S-Coupe MVTI 1.5 and for ages it intermitently looses spark on the 2nd cylinder. HT leads have been replaced 3 times, plugs twice new coil fitted recently and the ECU reports no error codes...HELP It could drive a few days without problems then suddenly looses spark COMPLETELY on 2nd cylinder, where that particular lead connects to coil, at the coil end it is dead too, what else can this be Any answers are much appreciated. PS 60k miles on clock. |
Re: S-Coupe Turbo(UK) misfire help needed
If I understand correctly, you have verified there is no spark coming out
of the #2 coil tower. Do you know if the coil is being commanded to fire? I heard of a case where the crankshaft sensor wheel was damaged causing a false TDC read and a lack of injector pulse or spark on #2 cyl. (Firing order is 1-3-4-2). I believe this car set a crank sensor code, however. But this case does remind me to ask whether you've checked to see if the #2 injector is firing? |
Re: S-Coupe Turbo(UK) misfire help needed
Yes that is right the spark isnt present at the #2 coil tower. The coil
must be being comanded to spark ok as the other 3 are ok. Not unless they are all independant of each other meaning the fault might not be anything todo with the HT line voltage at all? As far as i know injector 2 is just fine. What confuses me is the way the engine can run fine for quite a while then this happens for a few secs to mins at random intervals. Is the crankshaft sensor wheel easy to change? Another point to make, when idling the engine can idle a bit poor at times when warm but once throttle is added it runs at full power just fine, this is when the misfire is not present. A plug,lead change didnt help. |
Re: S-Coupe Turbo(UK) misfire help needed
After double checking injector 2, it is working ok, just no spark from the
coil tower for cylinder number 2. Can you recomend any parts/sensors that could be changed/checked to rectify this? coil/plugs and leads already done. Just to add, the car ran ok for 2 days then the spark dies off again for a few minutes today. the local hyundai dealer cant find anything or cant get the car to misfire while in shop!!! |
Re: S-Coupe Turbo(UK) misfire help needed
I believe the 1995 Scoupe has two coils and no distributor. The coil for
cylinders 2 and 3 could be having an intermittent problem. The sensor wheel doubles as the flywheel (manual) or flexplate (automatic). As such, you'll need to remove the transmission to replace it. |
Re: S-Coupe Turbo(UK) misfire help needed
Here is a simple thing you can try , the crank sensor is magnetic in
nature and on a manual transmission equipped car will get covered with metal particles . Just remove the sensor from the transmission and wipe off the particles if present . This fix the problem I had on my 95 Scoupe . On Tue, 07 Sep 2004 18:38:20 -0400, "hyundaitech" <howitsac@nospam.hotmail.com> wrote: >I believe the 1995 Scoupe has two coils and no distributor. The coil for >cylinders 2 and 3 could be having an intermittent problem. > >The sensor wheel doubles as the flywheel (manual) or flexplate >(automatic). As such, you'll need to remove the transmission to replace >it. |
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