engine trouble please HELP!!!!!
engine trouble please HELP!!!!!
iight i have a 94 sc300 and lately when i start the car...white smoke comes out of my exhaust....i put my hand down there to find out wut it was and i smelt it and bammmm!!! raw fuel...
I DONT KNO WUT TO DO....MY CHECK ENGINE LIGHT CAME ON AND I HAVENT PULLED THE CODES YET BUT IT SEEMS LIKE ITS MORE THAN ONE THING WRONG....NOT ALL THE FUEL IS BEIN BURNED AND ITS SMOKIN OUT MY EXHAUST.....SO MY GAS MILEAGE SUCKS I DROVE IT FOR A FEW MILES AND USED MORE THAN A 1/4 TANK.....
SOMEBODY HELP PLEASE!!!!!!
I DONT KNO WUT TO DO....MY CHECK ENGINE LIGHT CAME ON AND I HAVENT PULLED THE CODES YET BUT IT SEEMS LIKE ITS MORE THAN ONE THING WRONG....NOT ALL THE FUEL IS BEIN BURNED AND ITS SMOKIN OUT MY EXHAUST.....SO MY GAS MILEAGE SUCKS I DROVE IT FOR A FEW MILES AND USED MORE THAN A 1/4 TANK..... SOMEBODY HELP PLEASE!!!!!!
white smoke is usually a bad headgasket, if it's running rich you usually get black smoke. I'd say before you post up on the forums asking for help, you should probably pull your codes and find out what they are.
Also, this should be in the tech section, it'll probably get moved.
Also, this should be in the tech section, it'll probably get moved.
1985zcar has some good info but some not correct. if you do a cold start in the morning and there is white smoke it could just be condensation comming out of the exhaust. if it does smell like fuel and you have bad fuel economy and you have a check engine light replace your o2 sensor and thats probably your issue.
Lexus Test Driver
Joined: Nov 2007
Posts: 1,021
Likes: 0
From: Palm Harbor ,Fl
Could be condensation it could be coolant. Check you coolant reservoir and see if the level noticeably drops after a couple days. If you end up running out then you might have a head gasket issue. Check your codes and see if it isn't a 02 sensor. It might be and it could be caused by the coolant getting on the o2 sensors and leading to them failing. Check the codes then post what you found.
I Pulled The Codes And I Got A Code 14 And A Code 28....anybody Kno Wut Those Are I Think Code 14 Is The Igniter Signal...and I Think Code 28 Is The Main Oxygen Sensor...but Im Not Sure Somebody Help!!!!
Driver
Joined: Sep 2008
Posts: 133
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From: NJ
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Lead Lap
Joined: Oct 2006
Posts: 581
Likes: 0
From: texas
*this is straight from the repair manual for 93 sc300 on troubleshooting a code 14*
1) wiring (open,short) in the circuit between the ecu and igniter
2) igniter and/or ignition coil
3)ECU
First check for spark in all cylinders. If you have spark look for an open in the harness. If you don't move on to testing voltage leading to the igniter and ecu.
I know this is rather vague, and you need at least a voltmeter to test for voltage. I also suggest buying the repair manual for your car if you plan to do any troubleshooting/maintenence.
If you are not comfortable with doing any of these, I would take it to a mechanic.
Lexus Test Driver
Joined: Nov 2007
Posts: 1,021
Likes: 0
From: Palm Harbor ,Fl
Good call cause I was thinking the ignition to actually start the car for a second.lol I am out of it today for some reason. Check for spark from all sources plugs, wires, cap, and rotor. Pretty much explained by LEMMIEWINK (thanks for the assist ,dur dur)lol.
Lead Lap
Joined: Oct 2006
Posts: 581
Likes: 0
From: texas
You're not wrong. The ignition system is the system that ignites the fuel which, of course, allows you to star the car. What I just described is a problem that is electrical in nature. You were pointing out the problems that are mechanical in nature. (i.e. cap and rotor)
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