Code P0300 and lots of white smoke
#1
Code P0300 and lots of white smoke
I am new on here and looking for some help!
I have a 1996 Supercharged 3.8 in my Fiero. It was running perfect and one day I started it, pulled up to the stop sign and went to take off and boom it randomly started misfiring and almost dying. Its reading a code p0300(random cylinder misfire) and blowing a crap ton off white smoke that smells like fuel. I put my hand in front of the exhaust and i get soaked with fuel. The oil level is fine and no milky stuff on the bottom of the oil cap. Just wondering if anyone has experienced anything like this. It has me stumped right now before we start taking things apart and checking sensors. Kinda wondering if its the ignition control module. Thanks for any help!
I have a 1996 Supercharged 3.8 in my Fiero. It was running perfect and one day I started it, pulled up to the stop sign and went to take off and boom it randomly started misfiring and almost dying. Its reading a code p0300(random cylinder misfire) and blowing a crap ton off white smoke that smells like fuel. I put my hand in front of the exhaust and i get soaked with fuel. The oil level is fine and no milky stuff on the bottom of the oil cap. Just wondering if anyone has experienced anything like this. It has me stumped right now before we start taking things apart and checking sensors. Kinda wondering if its the ignition control module. Thanks for any help!
Last edited by nbul94; 07-29-2014 at 10:01 PM.
#2
Senior Member
Check to see if the fuel pressure regulator is blown out, if not you have a stuck injector if it raw fuel coming from the exhaust.
#3
Senior Member
True Car Nut
Here is a good video to help you properly test the FPR, skip to 1:50 seconds for the relative info.
#5
Thanks for the video. Will check that tonight! I don't believe it to be any of the gaskets, because within the last 10,000 miles I have tore the whole engine down and replaced them all. It'* possible but it'* dumping fuel like crazy.
#8
Retired
I agree, white smoke is usually an indication of the engine eating coolant. If it was fuel, you'd be seeing flames down the street.
Check the coolant level in the radiator.
Check the coolant level in the radiator.
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2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel
Retired Administrator
2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel
#9
Update tonight, scanner saying misfire on number five now. Plenty of spark there, saw it and felt it when I took the wire off! Ha Unplugged the injector and smoke started to clear up a little. Thinking the injector is stuck. I know it'* fuel coming out of exhaust, i have very short exhaust and it is very strong odor of fuel! I should clarify smoke has a bluish/white color. I know what a coolant leak looks and smells like. Coolant level hasn't changed and no overheating issues.
#10
Retired
If it is really a stuck open injector, that'* a first time for me seeing one on a 3800.
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Retired Administrator
2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel
Retired Administrator
2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel