black smoke!!!!!!
hi, i have a 1984 500sec, just wondering what causes black smoke when u rev the engine hard??
i am assuming its over fueling... (££££$$$$$) are there any sensors that can cause problems like this?? if so how do i diagnose them and where are they?? thanks for any input cheers:bow: |
We need more information, like the service history of the car or any other symptoms. Also, does this happen when the engine is hot and driving, a load factor, or above a certain RPM? The more information the better.
Could be injectors, and air filter, CO adjustment (rare) O2 sensor, or carbon burnoff. |
Originally Posted by Untertürkheim
(Post 3026612)
We need more information, like the service history of the car or any other symptoms. Also, does this happen when the engine is hot and driving, a load factor, or above a certain RPM? The more information the better.
Could be injectors, and air filter, CO adjustment (rare) O2 sensor, or carbon burnoff. new: injectors plugs ht leads dizzy cap rotor arm air filter oil&filter the car has done about 130,000 miles i have had the co adjustment done it uses too much fuel we think it only makes the black smoke when revved hard both under load and when in neutral no differance when its hot or cold! the throttle body has been cleaned out with lots of carb spray could it be a problem with the fuel distributor thing?? it does only seem to make the puff of black smoke at hi rpm i hope its an easy fix .... spent too much on this car already:smash: thank you :zoom: |
The cheapest and easiest solution would be an old O2 sensor that is not responsing fast enough.
|
Pressure problem?
I would start with the O2 sensor since they are cheap but sometimes a real bugger to loosen and change out.
The 84/85 SEC uses the M117 with a warm up compensator that also performs acceleration enrichment at lower temperatures. If the compensator or temp sensor is faulty it could lead to this type of symptom. I would recommend having someone with a Bosch fuel pressure gauge set hook up and run through the diagnostics. I would also recommend checking the vacuum systems temperature sensors if you have not done so already. Since the whole system works on pressure and pressure changes you can end up throwing a lot of money at the problem and not solve it. Sometimes the fixes are cheap but notoriously difficult to find. Good luck. |
Originally Posted by nsmith17044
(Post 3036590)
I would start with the O2 sensor since they are cheap but sometimes a real bugger to loosen and change out.
The 84/85 SEC uses the M117 with a warm up compensator that also performs acceleration enrichment at lower temperatures. If the compensator or temp sensor is faulty it could lead to this type of symptom. I would recommend having someone with a Bosch fuel pressure gauge set hook up and run through the diagnostics. I would also recommend checking the vacuum systems temperature sensors if you have not done so already. Since the whole system works on pressure and pressure changes you can end up throwing a lot of money at the problem and not solve it. Sometimes the fixes are cheap but notoriously difficult to find. Good luck. |
anyone? any more ideas what i should check and how i find the o2 sensor or temp sensor etc? its getting embarising covering the road behind me with a black cloud when i put my foot down ha ha
i have just read up on peoples past threads and found that these can be a problem, the cold start injector, EHA and KE control unit (FI systems brain)... how do i test them and where can i find them? thanks:y this car makes me feel like this...:smash::smash::smash::smash::smash: |
All times are GMT -4. The time now is 04:03 PM. |
© 2024 MH Sub I, LLC dba Internet Brands