Fuel Cut: What is it? How do I fix it? [merged]

[DRAG_ON1]

hey , when I am driving a consistent speed it feels like my car is turning the fuel off and then on. You can barely feel it. Or is it idle surge. When I drive in second gear at about 20 mph the car starts to buck alot.

I have done all of the free mods and 3 inch exhaust.

[LightningGSX]

You'll know it when you get fuel cut, it feels like you hit a wall.Check your plugs and wires.

[Drifte]

i feel the same prob, but its usually when i floor it. i need some input as well

[Timberwolf]

Could be intake leak. Have you crushed your BOV?
I recall having to swap ECU's to solve my problem similair to this.

[DRAG_ON1]

I have done plugs and wires last week. My car idles up and down some times.

[DRAG_ON1]

my bov has not been crushed. I heard it wasn't a very good idea.

[Turbo92Talon]

veh: 92 dsm awd
mods: 255 lph fuel pump, stock injectors
- new small 16g turbo ported
- new 95 ported exhaust manifold
- new 3" turbo back exhaust w/ 3" d/p & O2 housing
- Turbo XS manual boost controller
*
problem: boosts 13-15 psi till 5k rpm then as the rpms rise the boost rises until 6k where engine hits fuel cut & 20+ psi registers on the boost gauge
*
I'm not real sure what causes this nor how to combat it....
any ideas or thoughts would be greatly appreciated... I'm new to the game (DSM) & have been told that this is boost creep...what do I do??
TIA for your asstance...


Kevin

[benchandler]

I think this is a problem with our POS turboxs boost controllers, Try to set yours with the brass side almost all the way in and the "blue" screw almost all the way out. (assuming you have the high performance mbc) Im in the middle of fvcking with mine right now,
Creep with external wastegate.

let me now if you figure anything out. I actually think this creep is to do with our mbc's not being able to hold pressure.

[rebuilt65]

16G's are known to be creepy. Did you have yours modified with the 34mm wastegate flapper? That's a good fix. Also, I heard that 3in DP's can contribute to boost creep. Hope that helped.
regards

[THEDUKE]

If you set the boost controller up that way it will go full boost. They are bad for the ball sticking. But for setting take the boost controller off the car & set the course side(brass side) back it all the way out. This would be to your right & then start turning it in (to your left) and shake it and listen for the ball to rattle. Keep turning it in untill the ball stops rattling. this is a good point to start from. I go about one more turn past that but start from there. Then take the fine side (blue side) and turn it all the way in to bottom(to your right). Then back it out 4 turns & try it from there. Also the line from (Vac or Boost) works better if you come from the intake instead of the throttle body& use as short of vac lines as you can & use good line not soft line. If the ball does not rattle when you are ajusting the course side the ball is stuck & you can take the brass side apart & clean & add alittle graphite.Also the blue side has a oring that can start leaking. Pull the screw out of the blue side and see if the little oring is good & lube.

[Turbo92Talon]

I really dont think it is a problem with our MBC but im gonna try what THEDUKE just told me..... i will let u know what happens

thanks
Kevin

[Turbo92Talon]

does it ever end?!?!? now my car makes a weird noise at idle and it sounds like it is coming from the power steering pulley or pump or something in that area so i havent driven it down the road.... my luck the crank pulley would break off or something.

Anybody know what this might be?

Kevin

[THEDUKE]

Check your harmonic balancer. you will have to loosen your belts to make shure. Its bad for coming apart in two pieces.

[Turbo92Talon]

Originally posted by THEDUKE
Check your harmonic balancer. you will have to loosen your belts to make shure. Its bad for coming apart in two pieces.

Will i need a new one if this is the case?

[rebuilt65]

Oh Yeah

Here it is:

http://cgi.ebay.com/ebaymotors/ws/eB...2&category=335

Anyone have any experience with it, Ive really been hitting nasty fuel cut lately and was wondering if it would do me any good.

[RipperXX]

i didn't even know this existed... im curious myself... not that i have any problems...

[KRAZYKOREAN]

Waste of money...use the money for something else.. E.I. fuel pump.. afc etc etc..

[Turbo92Talon]

Ok i Looked at the Pulley while it was runing.... if it is the balancer wouldnt it be wobbeling or something like that?..... it also idles really low now that it is making this noise...... And the name of this noise is "Gobbling" i have decided......like a Turkey GOBBLE noise almost.... freaking weird!!

It is idling aroun 700 when cold , when it starts to warm up it idles around 500...... ANY more info or help?

Thanks
Kevin

[THEDUKE]

You have to take the belts loose to check this.My car made a noise for about a month & then the balancer just came apart.I guess you have not got to see if your boost creep is fixed.Let us know what happens.

[Turbo92Talon]

Well i tried to start it up and the battery was dead... at this point i was thinking the altenator was bad and was producing the noise..... so i jump it off and walk around behind the car to find out i had left the hatch popped .... what a dumbass i am.... anyways i decided i was goin to bump the idle up and see what happens.

I bumbed it up to around 950-1000 still cold ..... still making noise but not as loud!! I went inside for about 5 minutes and come back out and it is idling about 1400-1500..... I bump it back down to 850 and NO NOISE!?!?

? so i drive it around and have no problems other than still boost creeping... Next morning i crank it up and its idling low same noise so i go inside let it warm up come back out and its idling about 850 with no noise....I thought cars idled high till they warm up???
this is weird!!!

as for the creeping im ordering a 34mm wastegate flapper today!

thanks for your help,
Kevin

[bigjasoni]

OK. I keep getting fuel cut. I dont like it, can anyone tell me whats going on, or how to stop it. My car is stock, and I dont want to mod until i get everything in good order.
Thanks

[Slappster]

I thought awd's didn't get fuel cut. Or maybe 1gs do. Didn't it have to do with the rating of the tires that came out of the factory. The fwd's didn't have zr rated tires so they put fuel cut at 135mph.