HPTuners LNF: How to richen cold start AF ratio?

[AZmoto]

I'm not seeing anything obvious in the tables. Anyone know how to do this?

 

[Gtstorey]

LNF tuning is so limited, I don't think you can.

What are you trying to accomplish/fix?

 

[AZmoto]

Car is very hard to start when cold. I have to use starting fluid. Once up to temp it starts fine. I've been through everything I can think of but have been unable to fix. I'm starting to wonder if I need a new ECU.

 

[Gtstorey]

What are your mods or are you basically stock? And how cold is cold?

 

[AZmoto]

New ATK LNF long block, new turbo, sensors, fuel system. Running E85 (tune by ZZP). New Engine harness. New MAF. New LPFP and HPFP.

Cold is anything where the engine isn't up to operating temperature. Ambient can be 100+ (I'm in Arizona). Car will crank and crank and crank when cold. It fill fire right up with starting fluid and restart on it's own fine once up to temp.

 

[Gtstorey]

My ATK long block had a 4bar map sensor (part # 12612110 ) in it. Although I don't know that it would cause a hard cold start, does yours's have a 4bar and has the tune been adjusted to match it?

Beyond that, I don't know anything about tuning these on E85, other than the consensus on HPT was that at some point it was more trouble than it's worth. Might need to reach out to ZZP.

 

[AZmoto]

Yes it has the 4 bar and the tune accounts for it.