im looking for some pointers for my injection system on my nova
basically ive got a 1400SR block with a 1600GTE head and injection system fitted
the engine runs great but ive got a few niggles i wanna sort..
the main one is that it appears to be running rich when its out of idle
idle is ~1-2%CO but if i rev it to around 3k and hold it there with no load the CO climbs to 4-5%
i had originally thaught that the engine would be fine due to it being AFM controlled - ie less air means less fuel but i guess the 1600 is slightly more efficient hence the difference
i was thinking about fitting an adjustable fuel pressure regulator in place of the original and turning the fuel pressure down slightly then re-adjusting the idle setting - do u think this would work? if so what would be the best kinda regulator to buy
second issue is what i think would be described as "racing" possibly due to an over advanced ignition - if i crack the throttle open slightly the revs sloowly start climbing and keep climbing till 3k - close the throttle a teeny bit and it instantly drops back to idle - there is no way to hold any revs between 1 and 3k at idle and this also makes it very lumpy to drive at slow speeds
third issue is recent and possibly caused by the rich running - few weeks back i was in petrol station when i heard a strange ticking from engine - almost like a sticking lifter - i checked the oil (its done about 3k on it) and it was dark/black and smelled of fuel a bitty (ie signs of overfuelling) and was slightly low - i topped it up and the ticking went away
ive not done an oil change yet (its REALLY desperate for one looking at the oil) and last night i was sitting in the drive thru at the local maccies when i heard a really loud ticking from engine which increased perfectly in time with rpms - checking the oil level showed it to be VERY low so i went and got a bottle of oil and shoved it in - noise remained so i drove it home carefully - this morning it was gone but has slowly reappeared as the day's gone on and now seems to come and go with revs - could this be a sticking lifter? or somthing else?
hope someone can help get this sorted