7age with high hydrocarbon emissions *Sorted*
Car: 1984 Toyota Ae86 GT Coupe
engine: 7age
problem: ok so i built a 7age recently some of you may remember a previous thread i started about it. Well i have been having a lot of problems since i built it. I got the engine eventually running ok, went to get the car tested and it failed the hydrocarbons part of the emissions with a reading of 2970 ppm on the first test and mad 4070ppm on the re test. In ireland the limit is 1200 and i believe a good engine should have a reading of around 600ppm.
so obviously something is badly wrong. I have since stripped the head and found 2 very slightly bent valves, changed these but no change, then sent the head to get checked, he recut the valves then did a test and all valves sealing perfect, ive refitted the head but not built the engine back up.
Ive also done a compression test, 3 readings of 250 and 1 of 245psi, now i assume this is still ok even for a new engine? And shouldnt cause any problems with hydrocarbons?
i am just wondering if there is anything that could be causing hydrocarbons to be this high?
thanks for any input/advice
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