Hello everyone,

I recently disabled Lean Spool and started retuning me fuel map. I noticed that when the car is cold (sitting over night) I get crazy misfires when I try to drive it. I did not have time to log it yet, but once I start it up, try to drive to work, the car starts misfiring and almost dying out as soon as I try to give it any gas.

Can anyone point me in the right direction of where to even start looking? Post is my current fuel map, its work in progress. Any adivice would be great.

 

Can you post a data log? Hard to tell by just looking at the fuel map.

What fuel are you on? And what is your plug gap? What boost level?

A list of mods would also be useful.

 

Don't have logs yet. Hopefully in couple days. Fuel is 93 octane, boost is at 25 but I don't think that matters, since it does not misfire at WOT, only when I try to drive and give it the slightest gas.

Mods are all bolt ons, S1 cams, IC, exhaust, etc. It only started happening when LS was disabled so I'm guessing its running richer then it should between 80-120 load.

Spark plugs are NGK, factory gapped to .022.

 

check for a vacuum leak. Also ide pull the plugs and make sure they look good.

 

How did you disable the LS? In the periphery bits or by changing the start/stop rpm?

 

Idle is good when engine is warm, so doubt its a vacuum issue. Plugs were pulled couple weeks ago and looked good.

Periphery bit.

 

Change back the perephery bit and set the start stop rpm to the same

 

Just curious but what is the difference?

 

Any other advice?

I still dont have logs, but today I paid more attention to my gauges and this is what happens:
- car is cold and I just let go of the clutch and barley touch the gas and it starts dying out.
- AFR goes from 14.7 to 15.0 to totally lean. I'm guessing its because of the misfires and the fuel doesn't get burnt.
- the boost gauge is only at about -10 vaccum, so it has to be around 50-90 load TOPS.
- the plugs are definetly getting more fauled up because its getting worse.

Couple weeks ago I went to a step colder plugs and gapped at .023. Car ran fine for week but started to contantly misfiring and had to put the original ones back in. The step colder ones were completely black. The OEM ones were great for about 2 weeks and now started getting worse and worse.

I just pulled the plugs and they are also black.

If I remember correctly is the car in constant open loop when its cold? It would explain the once the o2 sensor starts doing it thing, the car run fine.

Any advice?