Okay, i have a Chevrolet S-10 Tahoe and i started my truck a couple of days ago, the first time i cranked it, it then started but then died. the second time i cranked the ignition for 3 seconds then it started but the RPMs went up high, like over rev. then i started seeing bule smoke bellowing out from underneathe the truck. like around the front axle and the tranny pan, (between there) after a second the RPMs went back to normal, i smelled it and it smelled like burning oil, or like paper, it was a wierd smell, nothing i've ever smelled before, but anyways, i shut it off then was heading towards my front door and i heard a clunk sound. please help me out i don't know whats wrong.
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If a vehicle shuts off while driving down the road. then restarts after about 10 minutes, its a bad crank sensor or the wiring to the sensor. A check engine light may not turn on. If the light is on. You can take it to any auto parts store to have the code read by a scanner for free. Auto-zone, Advanced ETC. Its worth a try! But first check the fuel pump relay, It may be getting hot and shutting down pump. Try swapping a relay of the same type, if it is ok, thats the problem. Hope this helps!
The blue smoke is produced by the engine burning oil. If it only comes in the morning, that more than likely points to worn out valve seals.if it only comes on in the morning after you left it off for a couple of hours, I wouldn't worry too much about it. unless its a bad leak where you have to add oil all the time. Good-Day!
Too much gas. Maybe the fuel pressure regulator has failed. Pull off the vacuum hose to the regulator-if any evidence of gas in the vacuum line, regulator is bad-diaphragm has ruptured and letting in extra gas to engine through the vacuum line.
If that is good, no gas in vacuum line, have the fuel pressure checked. Still possible the regulator is not right.
Watch the pattern of gas out the bottom of injectors while the engine is cranked. Should see a fine mist cone pattern spraying out from the injectors. If it is just dripping, injectors may be clogged.
The most common problem like this on the tahoe that i see often is a bad fuel pump but let me ask a few questions, truck starts and dies, what happens if you try to step on gas pedal to keep it going? have you had starting problems before, like long cranking time before engine starts? last thing is i need the year of this chevy tahoe and engine size if you dont know the engine thats okay but i need the year.
Only two reasons for this first is its below 0 outside the next is blown head gasket. Now thats WHITE smoke.ONLY.If it smells sweet like anti freeze that confirms head problem. black smoke is fuel, blue smoke is oil. sorry hope this helps TIM