Carbon build up
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 6,938
Likes: 1
From: San Diego CA
Carbon build up
I tried a high speed pass yesterday on the highway and had the typical black smoke when WOT and slowed down when approaching 550RPM. Upon geting home all was well no smoke, just running great. Last time I did that with the old 77 it started smoking blue on cold start and had to replace the valve seals. Went out again and tried it to 5700 RPM @ 110MPH and no smoke (3.70 rear). I think it was a matter of carbon deposts. I've heard people speak of valve float at high RPM but it doens't appear I had that. Any ideas aside from carbon deposit.
P.S. I'm really stoked about this engine. Put over 2000 miles on her since purchased and all I've done was replace points w/P2, replace rear main seal, oil pan gaskets and tune/time her. Starts up first turn of the key with no pedal action and even in rush hour traffic never overheats. Knock on wood.
P.S. I'm really stoked about this engine. Put over 2000 miles on her since purchased and all I've done was replace points w/P2, replace rear main seal, oil pan gaskets and tune/time her. Starts up first turn of the key with no pedal action and even in rush hour traffic never overheats. Knock on wood.
Melting Slicks
Joined: Feb 2003
Posts: 3,053
Likes: 4
St. Jude Donor '03,'11
Re: Carbon build up (Cali,68,L-79)
[QUOTE]typical black smoke when WOT and slowed down when approaching 550RPM. QUOTE]
happens a lot on cars driven by little old ladies. :lol:
sounds like it just needed to be blown out.
happens a lot on cars driven by little old ladies. :lol:
sounds like it just needed to be blown out.
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 6,938
Likes: 1
From: San Diego CA
Re: Carbon build up (Pacin'California)
Starts up first turn of the key with no pedal action.
Even in the morning when the car has sat overnight?
-Steve
Even in the morning when the car has sat overnight?
-Steve
