The fuel consumption seems to be up I am allowing for the fact that i am doing a lot of city driving now the car has just done a run from the UK to the Balkans and is here now and never missed a beat all the way here. The problem has only just started to become obvious and again it is at startup only. I have been told that it maybe a rich fuel mixture. How do you adjust this? Oil use is not heavy just small regular top ups every 6 weeks. There are new plugs and leads filters oil and air and is being run on 98 octane fuel and had a full service a month ago before the trip.Many thanks for any input you may have.
2007-01-19 02:13:19 · 9 answers · asked by Anonymous in Cars & Transportation ➔ Car Makes ➔ Volkswagen
I'm a Equipment operator for the millitary. Before I joined the millitary I was a mechanic on viehicles and construction equipment. It sounds to me that your Valve guide Gaskets are getting hard and brittle. Your intake and exhaust valves have springs connected to them, inside of the springs there are Gaskets keeping oil from entering the engine through the valve guide. My opinion is to do nothing, at this point. No damage will come of it. Put no additives in engine (stop Leak) for they will cure the problem temperorarly, but make the problem worse down the road. If it were my car I would drive it, and not worry. If the car was running rich it would smoke all the time and your engine would run rough because your spark plugs would get fouled in about a day or week, according how rich it was
2007-01-19 02:36:58 · answer #1 · answered by Robert D 2 · 1⤊ 0⤋
If it's only on startups - when left for hours or overnight then there is the possibility that the valve stem seals may be worn.
This allows a small amount of oil to leak into the cylinder(s) which is burnt off as soon as you start.
The amount coming through is normally very little so won't show up in normal running.
If it was the piston rings...it's be blue/black all the time & worse when revving. It's probably NOT too rich a mixture as the ECU (car fule computer) will adjust the mix via several feedback systems in a modern engine.
Simple test for the valve stem seals. If bigger plume of smoke first thing in morning than if you left it for half an hour. Not a HUGE job for a garage - but not cheap.
ps. Robert D & I are talking about the same thing...
2007-01-19 02:39:32 · answer #2 · answered by creviazuk 6 · 0⤊ 0⤋
Stephen the valve stem oil seals would be my first place to look .Remember the car is 10 years old and the weather in the Balkans
probably had an effect on the condition of the seals compare to u k weather being more stable .Alot of work involved to replace them as the engine is twincam 16 valve .No damage will occur but smokey when you start up .Other choice is a performance head with the work done for you .Good luck .Alan.
2007-01-19 05:08:16 · answer #3 · answered by not a mused 3 · 0⤊ 0⤋
Normally a puff of blue smoke on start up is from bad valve seals. If you are trying to fix this problem I would start there as it is the cheaper of the two options. The other is bad piston rings but they normally smoke some all the time and worse on hard accell ( like up a steep hill ) One last thing it could be is a bad fuel injector leaking fuel over night washing the cylinder clean.This would give you a puff of blue and your lower gas mileage. Good luck hope I helped
GM tech for 20 years
2007-01-19 02:59:16 · answer #4 · answered by Rudedude 4 · 0⤊ 0⤋
Blue smoke = oil ******black smoke = over rich mixture.
Both = worn engine components.
If your car only does this on a cold start- it might be your valve seals letting oil seep into the cylinders.
If your car does this at every start and stop, or when you hit the mash on the gas pedal, then your rings are not sealing right causing blowby-Gasoline and oil mixing in the combustion chamber. Time for an engine rebuild.
You can have a mechanic check for cylinder pressures with a gauge-if all cyl. are more or less the same, then the engine is worn, but still in somewhat good shape. A drastic change of pressure in one cyl. indicates damage to that ONE cyl. only. I'd recommend to save for fixing it or buying another car.
In the meantime, an alternative would be to use a thicker viscosity oil. -Make sure to allow a little bit more time for the engine to warm up with a thicker viscosity.
Clean your air and fuel systems throughly. Check all air/fuel metering devices that they are workig properly. Check your PVC-Positive crankcase ventilation system components that they function correctly
2007-01-19 02:30:48 · answer #5 · answered by Dodgese 2 · 1⤊ 1⤋
If it only does it on first start-up, don't worry about it. It'll be the valve guides a little worn, allowing oil to seep down into the cylinders overnight. It's not unusual, a lot of engines a little past their prime do that.
2007-01-19 04:05:34 · answer #6 · answered by champer 7 · 0⤊ 0⤋
Definitely running too rich on fuel mixture. Don't attempt to adjust it yourself but take it to a good mechanic for tune up.
2007-01-19 02:28:06 · answer #7 · answered by Thom Jo D 1 · 0⤊ 1⤋
is there any power to the bus bar , try a jump lead of the plus terminal onto the end of a glow plug hold it there for five seconds then get in and try to start it, if it starts then its either glow plug relay or theres a 50 amp fuse, my was on the bulkhead in the middle of the car, my car is a mk3 golf tdi, but yours will be same procedure on starting
2016-05-24 06:48:31 · answer #8 · answered by ? 4 · 0⤊ 0⤋
those are good possables but it also could be burnt piston rings
2007-01-19 02:19:12 · answer #9 · answered by trh76ajh 2 · 0⤊ 1⤋