have 84 mustang 5.0 ho with 600 cfm holley on it i think it running rich when i get on it it blows black smoke and my friend followed me one day and said he could smell gas bad should i set the timing higher or lower also what about the air/fuel mixture i havent messed with carbs much i changed the plugs and they were a little black looking any help thanks

Just look at the sprak plugs and see how rich its running...

ok plugs are black as coal so do i need to turn the timing up or what should i do

What jets do you have?

ok plugs are black as coal so do i need to turn the timing up or what should i do Wow thats way to rich, turn the timing down.

i thought u would turn timing up to burn more fuel

where is your timing at?

i thought u would turn timing up to burn more fuel

Yes, that is correct:grinyes:

i thought u would turn timing up to burn more fuel Thats why you're running so rich.

ok one says turn timing up the other says turn it down. what do i do

ok one says turn timing up the other says turn it down. what do i do Did the car start running rich when you turned the timing up?

If your rich, jet down.

Get a light and see where your timing is at.

If you adv the timing you will burn more fuel, but you need a light to see where your at. First is first, what jets are you running?

Has it always ran rich, or did it just start? How long have you had the car?

You do not chase a rich condition by adjusting your timing unless its way off, its normally the metering of the carb.

hello

hey i am new to this . whats up

Hi,

One thing people rarely check is the oil being contaminated with fuel. Due from either misfire, bad pvc, coolant temp sensor or O2 sensor. Sometimes an open loop will cause the engine to run rich. Any of these may or may not be part of your problem, but I like to get a whole lot of ideas so as to better my chances of curing the problem. Good luck.