engine: white smoke at high rpm

valdre331 · Jul 2, 2007

hey any help would be nice. i just got my 331 on the road did the break in and took it to the track on friday night. now the first run was good. but when i took it out for another run. the top or 3 rd and all of 4th gear i blew white smoke. when i got off the track the car ran fine. when i took my slip i had ran 6 mile per hour slower. so my question is what cause the white smoke. i check my plugs they look good, i have done a compression test but i will. i am think i ran lean, and that what caused it. is that possible? any i idea would be great. i worried to run the car again till i know what the deal was.

91 lx hatch · Jul 4, 2007

sounds lean to me

stangbear427 · Jul 4, 2007

Usually white smoke means too much fuel in my experience. Or valve seals, but that shouldn't be an issue on [new heads?].

valdre331 · Jul 5, 2007

the head are trickflow and all the seal and guides have been replaced. i am wondering if maybe my maf might not be working well. is there a way to check?

stangbear427 · Jul 5, 2007

Yes, but I don't remember how to do it. I think I saw it in one of jrichker's FAQs though.

mrmustangman357 · Jul 5, 2007

white smokes means: A. coolant or B. leaky vacuum modulator in the transmission, which AODs dont have. blue smoke is oil, and black smoke is fuel. check your coolant level, and make sure you know what color your exhaust is.

ninety15.0 · Jul 6, 2007

yea white smoke is generally coolant...not fuel

maxine-70 · Jul 6, 2007

valdre331 · Jul 7, 2007

ok here you go guys, i did a compression test yesterday. i have 150 psi at all around. next i check my coolant, it was full. the thing is when it blew some it was only past 5500 rpm. and it did it only at half track. like i had mention before on that run i ran 6 mph slower. so i am starting to think that my maf is not calibrated right and leaned the engine at the top end. yesterday i turn up the fuel pressure by 4 lbs, and took it for a spin. when i got on it it moved well, i watch the a/f on the autometer( not wide band) at it was in the stonich area. however if i gave 100% trottle it would go right into lean. does this tell anyone anything? if you need more detail about the engine let me know. but right now its a scat 331, track heat head, intake cam is f 303, injectors are 30lbs, maf is 90mm lightning.

stangbear427 · Jul 7, 2007

How much HP would you say you have? Generally, an engine that only requires 30# injectors doesn't need a 90mm MAF. If your engine does need that big of MAF, then I'd say the 30's aren't big enough. You can't do extensive tuning with a non-wideband A/F, but the fact that it shows full lean when it should be showing full rich definitely shows a problem you can trust, and while many people run an over kill size MAF with no issues, Just as many don't. Do you have any kind of chip/tuner/etc?

93 LX · Jul 7, 2007

white smoke is coolent, if it did it at 5500 it could have pulled it past the throttle body if you still have the EGR spacer and coolent lines installed. My 93 does this all the time. If it were that lean on the top end you would have burned something, plugs, pistons or valves or at least oil in the cylinder in this case the smoke would have been blue in color

green · Jul 7, 2007

anythings gonna smoke at 5500 rpm. it probally just looks like white smoke but its probally just some oil burning off at that high of rpm.

LAZERREDGT · Jul 7, 2007

I noticed that on my car after I ran it hard, come to find out my tranny leaked out some fluid at high rmps and managed to land on the H pipe producing a cloud of white smoke. Might want to check that also.

engine: white smoke at high rpm

valdre331

New Member

91 lx hatch

New Member

stangbear427

Active Member

valdre331

New Member

stangbear427

Active Member

mrmustangman357

Member

ninety15.0

New Member

maxine-70

valdre331

New Member

stangbear427

Active Member

93 LX

green

New Member

LAZERREDGT

Similar threads

engine: white smoke at high rpm

New Member

New Member

Active Member

New Member

Active Member

Member

New Member

New Member

Active Member

New Member

Similar threads

Privacy & Transparency

Privacy & Transparency