warwickben

iTrader: (1)

so for the last 3 days ive been trying to find the answer to my question. i have the haynes and chiltons (sp?) for my car. i searched online and couldnt find a answer.
i feel really dumb for asking this. my car is running to rich rich enough i have flames shooting out my tail pipe this is my daily driver ect. whats the easyist way to lean out the car. its a 1980 12a with the stock carb.

Jeff20B

iTrader: (13)

Get an '81 or later carb. They run leaner at idle. It won't pass emissions anymore, but I doubt your current setup would.

warwickben

iTrader: (1)

i dont need to pass emissions any way. my states law is 84 and older, next year it will be 94 and older. the carb is find, i just haveing trouble finding info on how to tune it ect.

Kentetsu

Check your timing first. How clean is the air filter?

Rx-7Doctor

iTrader: (13)

The engine is backfiring when you let off of the throttle, is this correct?

bugman1973

dont you just love rotaries for that. i'm on my third muffler due to running too rich.

mikewoodkozar

Flames are cool, but not on a dd

warwickben

iTrader: (1)

it shoots flames when i let off the gas if iam flooring it ie turning on to a busey road when i go from1st to second ect. i dont belive its the timming just the setup on the carb its a stock 1980 12a .

Jeff20B

iTrader: (13)

Maybe your trailing ignition is turning off under decel, or is always off? Remember '80 carbs run rich from the factory.

Rx-7Doctor

iTrader: (13)

Adjusting the carb will not do anything.

The deaccel system is not working properly. It could be that the dashpot on the carb is out of adjustment or bad. The ACV valve may be malfunctioning or bad. As Jeff has stated the trailing ignition may be malfunctioning. Could have a intake or exhaust leak.

You need to perform the test procedures listed in the FSM for the emission control system.
If you want to stop some of the backfiring right now then when you are shifting or deaccelerating then keep the gas pedal slightly depressed.
The 1st thing I would test is the dashpot that is located towards the firewall side.

warwickben

iTrader: (1)

i did the old put your hand over you tail pipes check for a exhaust leak. i have a small one. it wasnt shooting flames with the stock muffler. any ways iam takeing the car off the road in a week or two. this winter i plan on a motor rebuild rb exhaust head to tail pipe, and a side draft. thanks for your help . and rx7doctor i ve been keeping my foot on the gass to stop it(only when i drive by cops.) one good thing about it when i have to stop on hills and some one rides my *** and i worry i mite roll in to them i make it shoot a flame and 90% percent of the time they stop riding my ***, well ricers just stick there head out of there windows and scream do it again.