Question about 1998 Pontiac Sunfire

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Blue and tapping engine

A smelly blue smoke from tail pipe when cold excelleration and a ping or tapping noise when idling

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A bad valve seat would cause this problem.

Posted on Sep 30, 2008

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4g15 engine carburetor smoking only when engine is cold


smoking from where?, front of car, middle or tail pipe.


is this your first car, or first car and first winter (white steam?)
there are 3 kinds of smoke
black , carb flooding (ask why)
white, oil, burning, take for ever to go away
white steam, goes away fast and smells like Antifreeze, sweet and nasty.

and all carbs smoke black in the tail pipe end, when cold, unless
you very carefully tune the choke plate.
so do tell? what?

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This smoke, where is it coming from? is it coming from engine area or under the car or out of the tail pipe?what color is the smoke?

Aug 12, 2012 | Volkswagen Cars & Trucks

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When it idles for a while and then you step on the gas blue smoke comes out of the tail pipe 2004 BMW X5,4.4 with 90000km


you have the n62 engine in this x5 valve guide seals are leaking causing the blue smoke but i hate to tell you people havnt had much luck with repair in fact i am replacing the cylinder heads on a 750 with the same engine right now after an attempt to replace the valve guide seals failed to resolve the problem

Jun 08, 2011 | 2004 BMW 5 Series

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Why does my 1999 dodge 2500 4x4 ping real bad after it has been warmed up for a while and seems to be burning alot of oil? I have tried using premium gas but this does not help at all. I am adding at least...


If you see blue smoke comning out of the tail pipe that means your engine is burning oil and there is no way to control that other then replacing the engine itself.

Feb 27, 2011 | Dodge Pickup Cars & Trucks

1 Answer

I have true duels on my 1986 chevy pickup. It has a 305 motor. It only smokes on the passenger side of the tail pipe blue smoke only when the motoor gets hot. If im going down the road it stops. When I...


Bad news. Depending on what your mileage is, you can have a burnt valve, sticking lifter, bad piston ring all on the right side of the engine. The blue smoke is burning oil. Oil from the crank case is being compressed up into the cylinder and being burned. You will have to get a compression check on that side of the engine. You check the compression one sparkplug at a time while the engine idles. A loss in compression will tell you what cylinder is failing.

Good luck and thanks for your question and I hope my suggestions help. burdfrenzy
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Jan 04, 2011 | 1986 Chevrolet Chevy

1 Answer

My 92 ford is using excessive gas and has a bad gas smell with alot of smoke coming from tailpipe after i add gas


If the smoke comming from the tail pipe is black your running rich. If thats the case the entire fuel system has to be ckecked out. Injectors could be leaking, a bad pressure regulator,stuck return line ,a coolant temp sensor could be telling the ECU that the engines cold give her more gas. I don't recommend doing fuel service unless your qualified to do so for the obvious reasons.
If the smoke coming out of the tail is grayish you have a bad head gasket. If the smoke coming out of the tail is blue you have engine oil getting into the combustion chamber. keep me posted

Mar 08, 2010 | 1992 Ford Explorer

2 Answers

Loud tickking noise increases with excelleration. blue clouds of smoke out tail pipe and drinks oil


With what you say,it means you have an internal problem with the engine.Broken piston rings or a number of different problems may be the cause.It is a job the requires an experienced mechanic to diagnose and repair the problem.Sorry to tell you this.Hope this helps

Sep 12, 2009 | 1997 Dodge Caravan

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