Originally Posted by
antonyb
Hi,
I am writing from Italy, unfortunately there is not much information here and few have this car.
our mirage has a problem, for a few months the engine warning light comes on. When it is cold at a minimum and at low revs a cylinder feels that it is not regular. The computer detects failed ignition cylinder 3. Have reversed the coil 3 with the 2, after a few days light on again, the computer detects failed ignition cylinder 3.
On petrol the failure is less, and the warning light goes off when the vehicle is switched off, the LPG is often on.
The spark were replaced 6 months ago with the DENSO FK20HR11, now it's very cold, will these sparke be fine?
I like NGK, but maybe FK16HR11 is needed?
I do not understand why you can mount both.
In this forum I saw that the compression ratio is much higher than ours, which is about 6.
Thanks… sorry for my english...
So your car is able to run both propane/lpg and gas/petrol? What were the codes causing the check engine light? Did it just say missfire on cylinder 3 or ignition coil circuit? If you're running lpg I'm assuming you'd be running hotter plugs, I'm sure there is a thread on this forum about lpg that has more information than I can give. It is possible to burn valves or valve seats with propane if the cylinder head isn't built or modified to run lpg. Have you done a compression test? One cylinder is much lower the rest or if they are all lower then you've got mechanical problems.
Maybe foama will reply, he seems to know about conversions more than me.
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View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)