M50NV cuts out going from idle to WOT

[lolcantturn]

check this out. tried a new FPR and it seems to have reduced the amount of times it happens but nothing. new MAF doesn't change anything either.

http://www.youtube.com/watch?v=zwfNPcCdZ5w

you can see at :21 I try going WOT but it just dies.


help? this is getting awfully frustrating

[lolcantturn]

bamp

[e30rapidic]

what happens if you try to go to that 16,000 rpm a bit slower? does it rise up through the rpms smoothly or sputter?

[lolcantturn]

what happens if you try to go to that 16,000 rpm a bit slower? does it rise up through the rpms smoothly or sputter?

It used to sputter but with the new FPR it kinda died down. If I go slowly I can hit rev limiter but WOT it starts to sputter.

[e46s54dr]

Is your fuel pump pushing in enough fuel? What have you done to the engine lately?

[lolcantturn]

All stock M50. It started life as a 318is

[e46s54dr]

Are there any codes? Have you tried checking your tps sensor?

[lolcantturn]

I don't have check engine light wired in :( Guess I gotta do that.

[e46s54dr]

Things I would chck first would be

Vacuum leaks
Kinked fuel line
Clogged fuel filter
Dying fuel pump
Dying Tps
Dying Cps

[iceman]

I hear your idle surging in the video. Vacuum leak. Change all the vac hoses and ad hose clamps at the icv. Change the o rings too. It might not look bad, but the old hard rubber stuff just won't create an adequate seal.

[lolcantturn]

ok I tried finding vacuum leaks, couldn't find any at all. ive replaced just about every god damn seal and hose there is. Will the dipstick o-rings cause a vac leak? My dipstick doesn't seat my oil pan very well at all and it's just kinda flopping around.

[TimKninja]

Nor does my dipstick , but it doesnt cause that big of a vacuum leak.

Question, how is the vent line from the fuel tank hooked up? I was having a problem, everytime i would fill up my car. the car would stall out, and I had a really crappy idle. Surging (Tho not as bad as yours) , ended up just letting it vent into atmosphere and putting a vacuum line niplle over then end of the sensor port thing.

Manifold crack free?

try a new Iac?

[e30rapidic]

checked fuel pressure with a gauge?

[Jafxod]

lolcantr3v

[lolcantturn]

Wired in the check engine light, but no codes came up! The CEL didn't come up at all which is odd (except on accessory).

Nor does my dipstick , but it doesnt cause that big of a vacuum leak.

Question, how is the vent line from the fuel tank hooked up? I was having a problem, everytime i would fill up my car. the car would stall out, and I had a really crappy idle. Surging (Tho not as bad as yours) , ended up just letting it vent into atmosphere and putting a vacuum line niplle over then end of the sensor port thing.

Manifold crack free?

try a new Iac?

The vent line from the fuel tank is just chillin somewhere, it's not connected to anything. I don't have a charcoal canister or anything, or that purge valve.
Manifold is crack free
haven't tried a new ICV

checked fuel pressure with a gauge?

I have not, but I've tried two FPR's with the same result.