Flame And No Power Sometimes

[joe blo]

my car has been shooting flames lately. and sometimes it blows black smoke and sometimes it goes nowhere like a big flatspot. what would be wrong with it. its a r33 with atmo blow off valve and fmic. thats about it

[Link]

Atmo bov would be half your problem - bolt a plumback on and see what difference it makes

What Cat convertor are u using??

[joe blo]

i think the exhaust is only cat back. i dunno. as far as i know its still got the insides.

it feels like the car goes faster with 3 quarter throtle as opposed to full throttle

[2gceffy]

could the plugs be screwed leaving unburnt fuel ?? does it goin up gears, when you floor it, off throttle ??

[maccattack]

Could be a leak or split in your intercooler piping.

Worth a look

[RB32]

sounds a bit like how mine wasa

my car used to feel sluggish at full throtle but at 1/2 or 3/4 it felt fine.

it could be running very rich and also if u havent yet gap ur plugs to .08 it cleared

all my flat spots.

hope it helps...

[DRD-00F]

how do you expect fire to come from the engine if it has a cat in it?

a cat is like a sponge made of a hard clay... aint no fire getting through that...

i sugest you but a plumb back bov on there, check your intercooler connections for leaks in the line, and put a cat in your exhaust...

[joe blo]

i think il get new spark plugs. what are the 1s peopple talk about that are already gapped to 0.8?

how will i know if mine are whats causing the problem. what will they look like

[JayTay]

Chances are your coilpacks are shagged, when i got my 33 they were stuffed and flooring it through tunnels sounded like a machine gun, i had the exact same problems though, loss of power, shotgun bangs etc, tape up your coilpacks as per the DIY in the tutorials section or do it properly and buy splitfires. Changing the plug gap will only mask the problem.

Edited May 29, 2007 by JayTay

[joe blo]

it has splitfires. how do i know if there broken?

[BAMR33]

Won't be the coils. Try replacing the atmo BOV with your stock BOV if you still have it. If that doesn't work it could be any number of things but it's only going to be fuel related as you need lot's of fuel for flames to make it past the cat and mufflers. Could be any of these+more: faulty afm, leaking core, piping or hoses, fuel regs crapped it's self, could have reached r&r...

[MBS206]

I've seen flame go through a cat.

Mine did it once.

Do it too much and the cat WILL collapse/burn out.

Most likely, you've got an air leak somewhere, and under boost you're letting air escape (Meaning rich AFR)

This will be AFTER the turbo, before throttle body most likely.

[joe blo]

I've seen flame go through a cat.

Mine did it once.

Do it too much and the cat WILL collapse/burn out.

Most likely, you've got an air leak somewhere, and under boost you're letting air escape (Meaning rich AFR)

This will be AFTER the turbo, before throttle body most likely.

so starting from cheap things to check to expensive i should. check cooler pipes. check spark plugs and gaps?

what else