FIXED well long story short after all the tests i could think of decided to run it for a while and let it get hot . then up in the air with the car to find the exit pipe of the cat glowing cherry red . thought ah that could be the problem then a blocked cat as the internals of the cat were jammed up behind the down stream 02 sensor . so removed the manifold cat just to prove it only to find that it was still the same . then i had a brain wave ![]() with no ideas let to try sat and looked at the car thinking the scrap yard is calling As i said did every test and still had 2 almost dead cylinders No1 and N02 so why those 2 a blocked cat would affect all cylinders and i had spark injection fuel compression and timing all ok the one thing that i had not checked was the plug leads as i had not touched them and the car was ok the day before this problem apart form a damp start missfire some days so i thought what the heck swap no 1 and 2 plug leads over And yes it ran perfectly (well as far as a fiat with no exhaust could . A friend of mine had taken a quick look at the car while he was in my garage a couple of days earlier before i started stripping things off and had taken the plug leads of to check them and put them back incorrect but as the car had a bad miss fire from the blocked exhaust did not realise they were wrong and i did not think to check as i had not taken them off . I new all along i was missing some thing simple |
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