Black smoke and sluggish when accelerator is fully depressed
I knw that it is running rich and have been told that that could be a sensor problem. what sensors if any should i replace. Also, my model (the 90' 1.8L G60,) has no mass air flow sensor. I have also just replace one of the two coolant temp. sensors.
Re: black smoke and sluggish when accelerator is fully...
It sounds like a boost problem to me, if it starts normally and idles fine. when under load it needs boost,check your lines coming from the blower(up front) if its not getting enough boost it will run rich (no power black smoke) good luck.
Re: black smoke and sluggish when accelerator is fully...
Have you tried the throttle positioning sensor?. alot of times that could be one of the main reasons for it running rich. also check your oil level, too much oil will push pass the rings into the combustion chamber,or maybe your rings are worn down and need to be replaced.change your air filter,and make sure that your spark plugs are gapped properly, and that you use 8mm plug wires.the sluggishishness (lol) could be too much carbon build up on the spark plugs, not allowing it to properly fire. it may have also jumped time causing it to be sluggish, jerking and black smoke. black smoke isnt because it's running rich, it would be blue smoke. black smoke is oil burning.so i hope that this is helpful to you.
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clouds of smoke out the rear exhaus ,What color ? blue smoke is oil , white smoke is most of the time coolant is getting into the engines cylinders , Black the engine is running rich ,too much fuel .
DTC P0135 HO2S Heater Performance Bank 1 Sensor 1
DTC P0147 HO2S Heater Performance Bank 1 Sensor 3
DTC P0340 IC Module Cam Reference CKT No Frequency
DTC P0401 Exhaust Gas Recirculation (EGR) Flow Insufficient
P0441 has nothing to do with the gas cap !
DTC P0441 Evaporative Emission (EVAP) System No Flow During Purge
DTC P1441 Evaporative Emission (EVAP) System Flow During Non-Purge
P0441 & P1441 will be back , may take a day or two , but will be back because gas cap has nothing to do with it .
Honestly , you should take your vehicle to a qualified repair shop !
Yes, the engine is being overfuled if blowing black smoke. Possible internal leak of fuel pressure regulator. Possible sticking/stuck EGR valve. Possible computer supplying more fuel due to a sensor supplying false information. A scan tool will be required to determine if one or more sensors is supplying erratic info
not enough detail
to get an engine to accelerate , the air /fuel mixture is moved to rich in accordance with engine rpms
the more rpms the richer until the peak rpms are reached
( accelerator pump-power valve in carbies and ECM settings according to accelerator position
black exhaust smoke in diesels
so if you press the accelerator slowly then the air/fuel mixture is altered constantly in relation to the pedal setting
If you floor the pedal then it moves to rich and you get black exhaust smoke until the air mixture is again in balance
I had the same problem on my 2001 Sunfire (same car as the Cavalier-different branding) which I was able to fix successfully.
My symptoms were:
-Traction Control OFF light illuminated
-Cooling fan running even if engine cold and it was freezing outside (I also noticed that when the Traction light illuminated, the fan would then begin)
-Rough idle with black smoke when cold
-Poor fuel economy
I have a code reader which produced codes P0130 and P0171. These are error codes for the upstream oxygen sensor (the one under the hood).
I simply replaced the O2 sensor (it took me 10 minutes). I did not reset the check engine light after the repair as I wanted to see what the car would do on its own. The idle was much smoother with no smoke and the cooling fan stopped running unnecessarily. After 1/2 mile down the road, the Trac light went away and the system functioned normally. I tested this by trying to accelerate quickly up a snowy driveway. I also noticed that the acceleration and shifting (auto tranny) were smoother. I reset the check engine light. All is satisfactory.
What was happening to the car before the repair:
P0130 is usually for a bad O2 sensor and P0171 is the sensor detected that the motor was running too lean (but it actually wasn't-the sensor was essentially giving a false lean signal).
The rough idle, black smoke, and poor economy are due to running too rich. In my case, the sensor told the PCM (the car's computer) that the air/fuel mixture was too lean. In response, the computer said "OK, more gas!" That's why it ran rich. This was evidenced on the old O2 sensor as well...it was completely caked with carbon from an excessively rich mixture. This further destroyed the performance of the O2 sensor.
Black smoke indicates you are running rich. You may have to address the fuel injectors to make sure one is not stuck open. After replacing the MAF censor this would be my next step. Also your turbo seal might be leaking causing your truck to run rich throwing off the o2 censor. Also you can get black smoke from turbo blowby. Not burning oil but actual oil passing the rear turbine seal and getting into the exhaust. This should give you a few good places to check out. Good luck to you.
Black Engine running rich Possible Failure
-Map sensor, fuel injector or fuel pressure regulator.
Blue -Replace Faulty Transmission modulator valve
White Possible Failure. -Head gasket.
Hope this tip helps.