Help!!! 92 300zx n/a smoke and fuel out of exhaust.

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
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Phan
Posts: 153
Joined: Thu Nov 20, 2008 10:28 pm
Car: 2004 350z Roadster ~ Pearl White
1993 300zx Conv. ~ Pearl White
Location: Orange County, CA

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Cerealkiiller
Posts: 18
Joined: Wed Sep 04, 2013 8:25 am
Car: 92 300zx n/a slicktop.

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Ok so little update. I went out today and took out the replacement injector and reinstalled the old injector that is known to be bad. I know it's gonna have a miss, just wanna make sure the smoke goes away. When I went to start the car it was hydro locked with fuel. I pulled the plug and cranked it a few times and got all the fuel out of that cylinder. I then reinstalled the plug and coil and started her up. She still smokes but I expect that because of all the fuel in the exhaust system. I let it run awhile and the smoke got lighter until you would step on the accelerator. The smoke I was getting in the engine bay was just exhaust being blown back under the car it looks like. I let it run for awhile and pulled the fuel pump relay and let her die. Later on when my wife is home I'm gonna throw another plate on it off of one of my other cars and take it for a drive and see if I can blow that fuel outta there and go from there. At this point I know she's gonna just need updated injectors and all that, I just want to make sure I get the smoking under control so I know something else didn't go to s***. Plus I don't wanna fog the neighborhood out everytime I need to move it somewhere. So that's all for now I guess. It's still just missing on that me cylinder, it was just the smoke that worried me. That and that someone sold me a bad injector saying it was good. Oh well. Live and learn I guess. Thanks again guys. Ill update after I'm able to drive her and see what it looks like.

Cerealkiiller
Posts: 18
Joined: Wed Sep 04, 2013 8:25 am
Car: 92 300zx n/a slicktop.

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Just another quick update. I drove the car last week and it smoked pretty bad and I think burnt all the fuel out of there. I started it today and let it run for like almost 10 minutes with no smoke. Drive it around the block and when I got home it was smoking a little out of the pipes. Smelled more like oil now. s*** the car off for a few minutes. Started it back up and no smoke until the car ran about 10-15 minutes then light smoke that smells like oil out of the exhaust. Oil level and coolant level is still topped off and no mixing. Although my oil needs changed because it smells of fuel from the bad injector that I previously installed. To be clear it still has the original bad injector in it but I have it unplugged and I'm no longer dumping fuel, so it just obviously has the miss on the 3rd cylinder. I'm most concerned with the smoking issues now. Thanks again for all who have helped and might help in the future.


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