Turns out my CEL is due to a small, minute air leak, but trying to find it is another story. There must be someone else who's has this and I'm wondering anyone call tell me which hoses to check first? It's on the left bank, that much they know. Once that's sorted the light will stay off until it really needs to light up!
Generally a smoke generating machine would be used to gently pressurise the the various systems. The smoke is then seen when it finds the leak. It's pretty hard to find a small leak without that piece of equipment.
There must a can of smoke you can buy? I'm being serious too by the way! I was thinking about filling the back up with smoke. Just get my mother in law around for 10 minutes and lock her in the engine bay. But wouldn't there be to much air movement anyway to fill it up? I was also told it's a suck leak, not a blow leak.
A proper smoke generator is the way to go... however I believe this is to pressurize the engine system and I think the 'smoke' is nitrogen that shows as 'smoke' when it vents at the leak. This was used (Independent repair shop in Maryland) on my car to find that two of the four roll over fuel valves had cracked plastic housings. Baring that, years ago I would use short shots of ether (engine starter fluid) at various suspect areas while the engine is at idle. If the rpm goes up and then goes back down, you found/or are near the suction leak. Need to go slow and have good ventilation to get good results and preserve your health. Good Luck!!!
Graham, this might help: http://www.ferrarichat.com/forum/360-430/445670-roll-over-valve-need-advice.html
You might be able use a smoke pellet that is used to check for leaks in gas boiler flues. I bet if you lit one in a can and piped the smoke into the air inlet it'd work.
Nitrogen? My science class teacher taught me that nitrogen was a colorless, odorless gas. He also taught me that about 70% of the stuff we breath is nitrogen so I'm not sure how it could be employed in a smoke machine except as a carrier for the for the overheated baby oil we do use.
