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CA18DET
Posted: Sun Dec 11, 2011 6:03 pm
by Grant222
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?
Re: CA18DET
Posted: Sun Dec 11, 2011 6:06 pm
by White Fang
Use NF , and see what happens !
Re: CA18DET
Posted: Sun Dec 11, 2011 6:06 pm
by Grobblere
Might be spark,...check your plugs. Worth the check
Re: CA18DET
Posted: Sun Dec 11, 2011 6:11 pm
by Grant222
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
Re: CA18DET
Posted: Mon Dec 12, 2011 8:17 am
by Pinkfluffybunnys
Spark blow out.
Gap your plugs smaller try again , Not the best solution but will work
Re: CA18DET
Posted: Mon Dec 12, 2011 8:39 am
by Enzio
+1 to what PFB said. And change the plugs as well.
Re: CA18DET
Posted: Mon Dec 12, 2011 10:42 am
by Grant222
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
Re: CA18DET
Posted: Mon Dec 12, 2011 1:10 pm
by Pinkfluffybunnys
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?
Re: CA18DET
Posted: Mon Dec 12, 2011 2:06 pm
by Grant222
fuel is mr turbo the rest is stock
Re: CA18DET
Posted: Mon Dec 12, 2011 2:26 pm
by Pinkfluffybunnys
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
Re: CA18DET
Posted: Mon Dec 12, 2011 2:52 pm
by Grant222
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
Re: CA18DET
Posted: Mon Dec 12, 2011 3:58 pm
by Pinkfluffybunnys
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.
Re: CA18DET
Posted: Mon Dec 12, 2011 5:42 pm
by Grant222
Does the fact that its a narrow band AFR gauge effect it?
Re: CA18DET
Posted: Mon Dec 12, 2011 6:49 pm
by Grant222
Does anyone know how to tune the mr turbo system?
Re: CA18DET
Posted: Mon Dec 12, 2011 7:40 pm
by Daniel
Yeah...your wasting your time with a narrow band...