Looking for BUP
04-13-2019, 01:59 PM
#1
Looking for BUP
Currently have twin 496ho 2003. Little over 500 hrs. Motors run perfect, no miss, correct rpms, seem to be getting sooting only out of starboard motor portside. I could see it on my steering ram. Think it may just be a plugs and wires fix? I an no stranger to sooted up transoms my old ride had procharged 502s, sooting was a constant battle. Any suggestions would be greatly appreciated. Like the stock motor life style
04-13-2019, 05:21 PM
#2
Banned
iTrader: (9)
current fresh fuel is best to use - not 3 to 6 month lay up fuel... Next - fuel pressure testing ? - spark plugs and wires -- especially if you have the original spark plug wires.
Scan the engine - operating temps at the scan are ? MAP sensor readings when scanning ? and of course fuel injector SERVICE is a must with any 496 - they suffer from contamination issues. They are good injectors but the crap they collect is unreal.
I have spark plugs and all Brand NEW wire sets for all 496 s. We actually are redoing the 496 s spark plug wires because I am so picky that I wanted the best EMI / RFI suppression that is not offered in any other plug wire.
The spark plugs I have are GAPPED correctly, its a fine wire and priced really well. Ready to install. I carry 600 spark plugs for the 496 s inwhich I get a price break on. I do not use the AC Delco spark plugss for anything.
If still rich / sooty the intake manifold GASKETS gen 1 design was not good - the gen 2 IM gaskets is way better for sealing and holding that seal over time.
Scan the engine - operating temps at the scan are ? MAP sensor readings when scanning ? and of course fuel injector SERVICE is a must with any 496 - they suffer from contamination issues. They are good injectors but the crap they collect is unreal.
I have spark plugs and all Brand NEW wire sets for all 496 s. We actually are redoing the 496 s spark plug wires because I am so picky that I wanted the best EMI / RFI suppression that is not offered in any other plug wire.
The spark plugs I have are GAPPED correctly, its a fine wire and priced really well. Ready to install. I carry 600 spark plugs for the 496 s inwhich I get a price break on. I do not use the AC Delco spark plugss for anything.
If still rich / sooty the intake manifold GASKETS gen 1 design was not good - the gen 2 IM gaskets is way better for sealing and holding that seal over time.
Last edited by BUP; 04-13-2019 at 07:07 PM.
