Question about 1996 Lexus LS 400

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Running rough Run rough after drivig about five miles smell gas fumes some smoke comes from the tail pipe

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  • Anonymous Mar 17, 2014

    I have a 2007 trail blazer with a PO300 code showing. It it is idling really rough and smells like raw gas coming out of the tail pipe. Would really like help with this issue I know the dealer is going to charge an arm and a leg and I have a feeling it is just something simple in the electrical just need an idea of where to start. Thanks

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1 Answer

Could be a bad catalytic converter, check under the car and see if they turn a hot red color.

Posted on Nov 06, 2008

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Related Questions:

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I would like to know what makes that the Jeep smoke after rearranging the vacuum lines is it the EVAP system on HBO or the engine vacuum lines vacuum lines


the book is free,
and real
and posted here over 300 times, search much.
all that is covered in the SM. (how to put it back as it was new)

no clues as to what the smoke is.
or where it emits from. (tail pipe end)
white smoke or black
black is rich running.
white can be burning oil and smells like burning oil (lingers)
white can be steam,aka, antifeezes burning, goes the vapors dont linger like oil smoke does and smells sweet, unlike oil smoke.

EVAP is only FUEL vent , fumes. gas fumes.
there are lots of vacuum lines
to engine
evap
brake booster
the engine hood sticker covers the majors, (smog related, )

SM , serv. man. click WK and read.

free
http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service

Dec 11, 2016 | Jeep Cars & Trucks

1 Answer

What causes white smoke to come from the tail pipe with strong fumes while in idle?


A heavy presence of white smoke from the tail pipe is usually caused by a bad headgasket. If this gasket is bad, the vehicle may run rough as well as overheat.

Sep 13, 2015 | 2002 Mercury Mountaineer

1 Answer

Smelling fumes out the exaust tail pipe


would you please describe the fumes like raw gas fumes oil smell smells rich etc and color of the exhuast fume and if real smokey extra smoke

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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

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oooooooooooo my friend white smoke mens head gasket is gon sorry

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Backfiring, rough idel


I would check the exhaust pipe a little closewr. White smoke can also mean a blown head gasket. Check the tail pipe to see if moisture is present. Also check coolant level. A blown head gasket can also cause related problems.

Bill

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