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> 1996 850 Turbo Misfires When Hot, Ignition
Ken Welsh
post Jan 3 2013, 05:23 PM
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This 1996 (220KM) car will run fine (perfect)for about ten minutes from cold (I'm talking -5 C)then starts to misfire when warmed up. Difficult to pull away(automatic)from a stop. Sound like its missing on two cylinders. Really chunters. Installed new plugs, wires, cap, rotor, coil,filter. Don't know what to check next. Car will work at speed but I can feel it missing. Gun it and it will go. Doesn't appear to be a fuel problem. Anyone got any idea's or similar experience that led to a solution?
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danielm85948
post Jan 4 2013, 12:05 AM
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QUOTE (Ken Welsh @ Jan 3 2013, 06:23 PM)
This 1996 (220KM) car will run fine (perfect)for about ten minutes from cold (I'm talking -5 C)then starts to misfire when warmed up. Difficult to pull away(automatic)from a stop. Sound like its missing on two cylinders. Really chunters. Installed new plugs, wires, cap, rotor, coil,filter. Don't know what to check next. Car will work at speed but I can feel it missing. Gun it and it will go. Doesn't appear to be a fuel problem. Anyone got any idea's or similar experience that led to a solution?

sounds like a dirty throttle body at the butterfly remove and clean it , with throttle body cleaner, and check the crankcase breather when it is very dirty, it will push a mix of carbon and oil up to your throttle.
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Ken Welsh
post Jan 4 2013, 08:29 AM
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QUOTE (danielm85948 @ Jan 4 2013, 12:05 AM)
sounds like a dirty throttle body at the butterfly remove and clean it , with throttle body cleaner, and check the crankcase breather when it is very dirty, it will push a mix of carbon and oil up to your throttle.



Thanks for the reply. I will follow this advise. Ken
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Ken Welsh
post Jan 6 2013, 06:11 PM
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Thanks for the advise. The throttle body cleaner worked. I also put a can of Seafoam in the gas tank and put a 1/3 of a can into the engine (vacuum hose)to blow out the dirt. I am going to go back through it all again in the spring, can't say I like working in the freezing cold to fix this stuff.

Chimo!
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SeaMike
post Jan 30 2013, 03:03 AM
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QUOTE (Ken Welsh @ Jan 6 2013, 05:11 PM)
Thanks for the advise. The throttle body cleaner worked. I also put a can of Seafoam in the gas tank and put a 1/3 of a can into the engine (vacuum hose)to blow out the dirt. I am going to go back through it all again in the spring, can't say I like working in the freezing cold to fix this stuff.

Chimo!



Don't seafoam anything....bad news.
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Kiss4aFrog
post Mar 10 2013, 03:10 PM
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QUOTE (SeaMike @ Jan 30 2013, 03:03 AM)
Don't seafoam anything....bad news.


And why would that be ??

Seafoam added to the fuel is the same as using a fuel injector or carb cleaner. It physically helps to clean the injectors. I prefer the Lucas brand FI cleaner but that's just personal preference. Using a cleaner is recommended as periodic maintenance.


Pouring it into the intake or sucking it in through a vacuum hose helps clean everything down stream from where it's put into the engine. The intake, throttle body, combustion chamber and valves.
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Attached File  Seafoam_motor_treatment.jpg ( 54.38K ) Number of downloads: 0
 
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SeaMike
post Apr 16 2013, 09:57 PM
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QUOTE (Ken Welsh @ Jan 3 2013, 05:23 PM)
This 1996 (220KM) car will run fine (perfect)for about ten minutes from cold (I'm talking -5 C)then starts to misfire when warmed up. Difficult to pull away(automatic)from a stop. Sound like its missing on two cylinders. Really chunters. Installed new plugs, wires, cap, rotor, coil,filter. Don't know what to check next. Car will work at speed but I can feel it missing. Gun it and it will go. Doesn't appear to be a fuel problem. Anyone got any idea's or similar experience that led to a solution?


Check and see what the pressure is in the cooing system. If the head gasket is going, it could be allowing coolant to leak into the cylinder and fowling the plug.

Also, what codes have you pulled?
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danielm85948
post Apr 16 2013, 11:45 PM
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QUOTE (Ken Welsh @ Jan 6 2013, 07:11 PM)
Thanks for the advise. The throttle body cleaner worked. I also put a can of Seafoam in the gas tank and put a 1/3 of a can into the engine (vacuum hose)to blow out the dirt. I am going to go back through it all again in the spring, can't say I like working in the freezing cold to fix this stuff.

Chimo!

as you have a turbo,clean your inter cooler you can get an oil and water mix in there ,there should be a drain plug on the bottom of your inter cooler.
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Kiss4aFrog
post Apr 17 2013, 01:17 PM
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Besides the can of liquid that's good for adding to oil or gas there is also an aerosol that can be sprayed into the intake upstream of the throttle body to clean that too.
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