1n1tialjdr1ft

I'm having the general hot start issues on my TII. When it's cold it will generally start right up, runs rather rough but does run. Grey smoke out of the exhaust when it's starting up. Idles fine at about 800 until it starts to warm up then it will just slowly flood itself bog down and die. Typical. I pulled the bottom left spark plug on the front rotor and listened as a cheap means of compression test, and the sound was postive, a very steady psst..psst..psst. I pulled of the intercooler, throttle body, and upper header. A couple hoses on the "vacuum hose spider" were melted shut. I also found that the wire on the o2 sensor on the exhaust behind the turbo was completely corroded from the harness. (Both will be repaired soon but I'm currently in a different city than the car...) I'm also suspecting leaky injectors ATM due to the hot start symptoms. What effects on running do the o2 sensor and closed vac lines have? Are the symptoms telling anybody leaking injectors?

Mods on the car are as follows: Streetport on intake and exhaust ports, 2 550cc and 2 720cc injectors, R-Teck 1.7 ECU upgrade, hardened stationary gears, Racing beat full exhaust

HAILERS

The 02 sensor has NO effect on starting at all. Only used while driving over 1700 rpm and at a steady speed under 3500rpm.

Could be leaking injectors causing flooding.

A little info here. When a cold engine starts up, the mixture is kept RICH. It stays rich until, if memory serves, about 125*F where upon it leans out a full afr point. Say from 11afr to 12.5 afr, and then around 155* or so, it leans out a bit more to say 12.5 afr to 13.2 afr.

Those are just general numbers from memory. But the idea IS, the mixture gets Leaner as the water temp rises. So it's opposite what your thinking imho. Could be wrong, don't think so.

The smoke upon start up could be the injectors leaking a bit over night and causing the smoke. Much like unflooding a heavily flooded engine where you see a lot of white smoke for a minute or so. Fuel being burnt off.

Hard starts when hot are usually low compression or injectors flooding. Since your car starts up each time when cold, I'd say the water thermo sensor is good. If it were broken or wire open, the car would be hard to start cold.

The above is just an Opinion. No telling exactly what the problem is this side of the keyboard.

1n1tialjdr1ft

Thanks for the info Hailers, I was planning on putting a air fuel gauge in the next chance I got. Is there a method to testing my injectors or should I just send them in for cleaning? The spark plugs are also pretty soaked with gas after I even attempt to start it when its warm after cleaning them with a wire brush...