I have a 91 crx si with a new head and its blowing black smoke when I rev it up I pulled the exhaust manifold off and the number 1 exhaust port is wet. Just want to see what yall think im thinking leaky injector??

 

Man, first post as a trial user. Definitely try google first.

But I will answer. The cause of smoke based on color:

Blue: Oil

Black: Fuel

White: Coolant

Sound like you do have a bad injector. I would not rev it too much until you figure out why your injector is pumping too much fuel. It is probably stuck open, clogged, ect.

 

Yea I see that is where I'm suppose to post at my bad... I'm a super newb at fourms .
Could you send my a link to were I'm suppose to post?? It would be greatly appreciated!

 

I think he was just suggesting you google/search the forums for your answer before you post a new thread. Is your car mis-firing noticeably? I would change that injector to another cylinder and see if the problem follows the injector. If it doesn't, and your having misfire issues, you may be looking at a burnt valve.

 

Before you go burnt valve: Remove the plug and let the fuel evaporate. Shouldn't take long. Try new spark plugs, try moving the plugs from cylinder to cylinder. Could also be bad spark plug wires. Could be a distributor issue also. I had a terrible misfire in my B16 when I did my swap, it's on this forum somewhere. Ended up just having so much fuel it wouldn't fire. I let it evaporate and it worked out. Mine was literally pouring fuel out the tailpipe. I let it idle, moved the car a foot. Took a lighter to it and watched it burn.

Move the fuel injector to a different cylinder. See if the issue follows it.

Move the spark plug to a different cylinder. See if the issue follows it.

Move the spark plug wire to a different cylinder. See if the issue follows it.

Unplug the spark plug for the problem cylinder, while the car is running, you should hear the idle drop.

If it follows any one of the first three things, replace the part. If you don't get an idle drop with the fourth, you are definitely not firing on all 4 cylinders.

My guess is a faulty injector though.

 

Ok thanks guys I will check it all after work and let ya know