dumping fuel into cylinders, white smoke, bearly runs.

[Tims03svt]

I would say it might have something to do with engine management ie: ECM coolant sensor, o2 sensor, map sensor.... If you swapped ECM's and it ran fine/better but then started running bad again the ECM found a problem and is trying to make up for it. Check codes and see what you come up with.

 

[Exp]

I was having a very similar problem. Tons of white misty smoke in the exhaust, poor power, idle surging and falling, runs rough, eventually engine dies. Cold start is easy and seems OK until warms up. Restart after warm is difficult, requiring much cranking. Checked codes using light, and it indicated vacuum/EGR related problems and erratic timing signals. I Replaced ICM on distributor and rotor & cap and plugs (wires were fairly new). Also replaced EGR valve, and several vacuum hoses just to be sure of good vacuum. It seemed to run better for a while, smoke cleared, but still lacked power. Then it went right back to the initial problems. I checked the codes and it seemed to point to the EGR/vacuum system as culprit, plus this time the charge air temp was out of bounds. Removing the air sensor out of the TB (it's in the down pipe of the #2 cyl.) and noticed a lot of fluid coming out -- I thought it was coolant, and that would explain the smoke -- but it was fuel. I thought it would be impossible for the TB to be full of fuel and the engine still run, but it also explains why I saw slight seepage of what I thought was oil coming from the mouth of the TB. The fuel was washing carbon deposits from inside the TB, carrying it to out the mouth. Removed the TB, and all three downpipes on the right side (cyl.s 1,2, & 3) were full of fuel. So it was evident the engine was only running on 3 cylinders, and the right side valves were not functioning, allowing the right side down pipes to flood with fuel. Also explains the immense "smoke" coming out of the tail pipe - really a fog of unburned fuel.

 

[CraigK]

Interesting thread . . . with lots of good suggestions.

Exp is probably correct, white smoke/fuel in oil is from way too much UNBURNED fuel. But that is really a symptom, not the problem.

Heed alwaysFlOoReD, if you run this engine for very long with fuel diluted oil, you soon won't need to bother fixing the fuel issue, as bearings will become damaged.

My small suggestion: try simply disconnecting the O2 sensor. If this is malfunctioning, and signalling for too much fuel through the injectors, this will immediately be fixed with a simple disconnect. At the very least, you might gain insight into what the problem is or isn't.

Also, is the appearance of all of the plugs similar? Are the plugs from one cylinder or one bank different from the others? The answer may indicate a plug firing vs. system issue.

Good Luck!
CraigK