Leaking TBI Injector??

Most likely a ruptured fuel pressure diaphram.

Cheers

Or a bad CTS.

Doc

-------

Whats that Doc.

HDS

Coolant Temperature Sensor, tells the computer how hot the motor is and adjusts air/fuel mixture accordingly. If it's nearing the end of it's life (or completely shot), it defualts to -40F which runs a super rich mixture and can cause the black smoke. It's located right next to the waterneck on the intake, will have two wires (usually yellow and black).

Doc

Some advice if you replace the FP regulator:

don't just buy the repair kit. Buy the whole darn thing. The spring inside the regulator likes to break into multiple pieces, and it doesn't come in the repair kit. You will invariably find this out at

Ask me how I know. ;)

Isn't that supposed to cause a constant rich setting though?

-The Lonely Grease Monkey

"Ignorance is preferable to error; and he is less remote from the truth who believes nothing, then he who believes what is a wrong." - Thomas Jefferson

motor

Yes it is, that's exactly what I said.

Doc

Sounded like it was an intermittent smoke problem... and a CTS would cause constant black smoke, or close to constant....

~KJ~

Not necessarily. If it's an intermittant electrical connection (CTS contacts are prone to corrosion due to location) it wouldn't be constant. Also, on a colder day, even if it was running way rich, it might not be enough to cause constant black smoke.

Doc

Makes sense. Thank you much for the lesson!

~TLGM