CA18DET

Grant222 · Post by **Grant222** » Sun Dec 11, 2011 6:03 pm

On .7bar it runs perfect through the revs, but when i put it to 1.2bar in the higher revs it starts to stutter(kinda like backfiring), its never done it before, today is the first time, under boost while it stutters the AFR reads 13.5?? On.7 its 13.1 and 1.2bar 13.5 so it is getting the fuel it needs, what else can it be?

White Fang · Post by **White Fang** » Sun Dec 11, 2011 6:06 pm

Use NF , and see what happens !

Grobblere · Post by **Grobblere** » Sun Dec 11, 2011 6:06 pm

Might be spark,...check your plugs. Worth the check

Grant222 · Post by **Grant222** » Sun Dec 11, 2011 6:11 pm

Iv read that it might be plugs and i never changed them when i bought the car that time so they might be finished or just really old, will check them tomorrow

Pinkfluffybunnys · Post by **Pinkfluffybunnys** » Mon Dec 12, 2011 8:17 am

Spark blow out.

Gap your plugs smaller try again , Not the best solution but will work

Enzio · Post by **Enzio** » Mon Dec 12, 2011 8:39 am

+1 to what PFB said. And change the plugs as well.

Grant222 · Post by **Grant222** » Mon Dec 12, 2011 10:42 am

Ok, so i let the car idle till it got to temp then took it on the road and played with the fueling a bit took the AFR from 13.5 at idle to 13.2/3, and it runs better now than after the dyno tune, the plugs all looked a bit worn so will be getting new ones asap

Pinkfluffybunnys · Post by **Pinkfluffybunnys** » Mon Dec 12, 2011 1:10 pm

Ok, so i let the car idle till it got to temp then took it on the road and played with the fueling a bit took the AFR from 13.5 at idle to 13.2/3, and it runs better now than after the dyno tune, the plugs all looked a bit worn so will be getting new ones asap

What managment system are you using?

Grant222 · Post by **Grant222** » Mon Dec 12, 2011 2:06 pm

fuel is mr turbo the rest is stock

Pinkfluffybunnys · Post by **Pinkfluffybunnys** » Mon Dec 12, 2011 2:26 pm

OK, So at Idle you running 13.5?

What is your load AFR? Your part throttal AFR?

Also what are you using to get your AFR"S

Grant222 · Post by **Grant222** » Mon Dec 12, 2011 2:52 pm

at ful boost it runs 13.6 and normal driving its in the 14 15 range, wil take vid of the gauge tomorow, using lambda about 50cm frm turbo exh housing

Pinkfluffybunnys · Post by **Pinkfluffybunnys** » Mon Dec 12, 2011 3:58 pm

Wow.

13.6 at WOT your a very brave man.

I run 12.7 at WOT on the Sentra 11.6 On the SX.

I have tried running 14.7 -15.5 at part throttal but the car really feels dead in this range at slight tip in.

So I now run 14.2 -13.9 throttal responce is great.

Idle is at 15.5 as not much action in this area.

Grant222 · Post by **Grant222** » Mon Dec 12, 2011 5:42 pm

Does the fact that its a narrow band AFR gauge effect it?

Grant222 · Post by **Grant222** » Mon Dec 12, 2011 6:49 pm

Does anyone know how to tune the mr turbo system?

Daniel · Post by **Daniel** » Mon Dec 12, 2011 7:40 pm

Yeah...your wasting your time with a narrow band...

*Nissan 200SX Club - South Africa

CA18DET

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