#1: backfire with white smoke from gti 138 Author: scoop, Location: cairo,egyptPosted: Fri Aug 17, 2012 6:06 pm ---- it happens when load is in engine during hot evening but not always and also eats some oil, what could that be?? chmabers?? or valve seals or...? i also noticed oil that comes on spark plug number one
#2: Re: backfire with white smoke from gti 138 Author: Fifer, Location: FifePosted: Sat Aug 18, 2012 9:20 am ---- White smoke is normally water in the exhaust and would point to a head gasket failure. White smoke on start up is normal due to condensation in exhaust. How much oil are you losing. Are you losing coolant. If you unscrew the expansion cap cover (cold engine) do you have an oily residue in the tank? Does the exhaust smell sweet?
Otherwise it's a compression test that's needed on number 1. Compare it with all the others and it should be the same. Low compression could be a few things.
#3: Re: backfire with white smoke from gti 138 Author: scoop, Location: cairo,egyptPosted: Tue Aug 21, 2012 10:59 am ---- there is no water loss, and no oil in water coolant, and when it eats oil it eats about one liter at once, and when i start the engine at cold it works like 3cylinders and then 1 minute the engine works 4 cylinders like normal, but i noticed that the fuel consumption is craaazyyy and bad performance. i think that spark plug one has oil on it when cold and when the injector sprays the fuel on the spark plug till oil goes off then the spark works normal.... am i right?
#4: Re: backfire with white smoke from gti 138 Author: Fifer, Location: FifePosted: Wed Aug 22, 2012 8:50 am ---- Do you get blue smoke on start up after the car has been sat a while? (Valve seals). Mine is a diesel so I don't know if you have individual coils. If you do swop the coils over and does the problem move cylinders (coil duff). Try the same with the plug ( plug duff) You need to be carefull if it's only running on 3 cylinders as you could get bore scrub.
It could also be worn or cracked piston rings. You need a compression test.
#5: Re: backfire with white smoke from gti 138 Author: scoop, Location: cairo,egyptPosted: Wed Aug 22, 2012 1:40 pm ---- no blue smoke when start
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and bad performance. i think that spark plug one has oil on it when cold and when the injector sprays the fuel on the spark plug till oil goes off then the spark works normal.... am i right?
