This is what I've got now after several tries. I upped my cranking PWs and my ASE. Warmup is unaffected. I really needed to up them ALOT in the colder temperatures. At around 0 C it is not brilliant yet, but I will get there.

Thanks, that gives me a great place to start.

I can't get the car to start below 40 degrees with stock injectors period without start fluid. After it starts and coolant temps get above 45-50, it'll have issues, but still crank. after 60, starts right up. Not sure why. I've tried a shit ton of different values in cranking settings.

I'm swapping in the 550s while the car is down for a turbo rebuild and hopefully it will be enough fuel. I'm just wondering if the stock injectors are fucked, I had a bit of a rough idle on stock ECU...new plugs/wires, stuff like that.

sounds like not enough fuel during cranking still.

Def. I haven't been able to pull the msq off the laptop, but the PW on the stock injectors are well above like...12 pw/s. and only sometimes will it sputter and act like its trying to start. Above that it wont do anything, below it wont either.

With the settings I posted I haven't missed a start yet including this morning when it was 16F. Took a little longer to catch today, guess I could add fuel but better to get that oil flowing right? Once it catches it purs like a kitten too. Been lucky I guess. I just stole Paul's numbers and haven't had any issues.

Been tinkering with my car's cold start-up settings too.

Cold-temp CPWs weren't high enough, ASE was too lean, warmup wizard settings were too rich. More tweaking is needed but now I'm in the ballpark. Also the coolant temp readout in Megatune is too low -- last night it said 11 when the outside temp didn't dip below the low 20s all day.

Paul says this is because of a mis-setting in EasyTherm. I don't know anything about that.

You posted your cranking PWs in this thead. Could you post your ASE and WarmUp too please?

Does anybody have any settings for 550cc BELOW 35 degrees....I've been trying a lot of stuff...it'll sputter once, but NEVER start.

only gone as low as 30*F, no issues with 460s.

To about freezing they do OK, anything at or below, I can't get shit to start, I can't seem to get much difference. Sometimes I get a sputter when I first turn the key, but that is it. I have to wait 30 seconds to a minute to try again, and I get the same sputter.


When it cranks like it should, it takes one turn of the key, the first fire up is perfect, idles rough for less than a second and finds the idle and is great.

did some changes today on cold cranking. at -5C I have about 40% enrichment. I think that's a hair too much, but it starts eventually. Next time I will try 35%. I'm trying to get the cranking AFR to be around 10:1 or 10.5:1. right now it pegs the WB at 9.8 so I don't know what it REALLY is.

It was 40* this morning and it took me a little over an hour to get my car. My car hasn't seen these temps with MS so my setings were way off. By the time I got it started I had to have my other car running with jumper cables connected to my battery and I had to pull my plugs once to dry out the cylinders. I got it though. What do you goys with 550's in 40* weather have your crank settings at?
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you need less fuelz.


these should get you running at those temps:

5.9
5.4
5.3
4.9
4.4
3.8
3.3
2.7
2.2
2.1



i shaved 20% off my 460cc map.

I'll give them a try. What would you suggest for warm up?
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once it catches, its in the hands of ASE, that slowly decays out to warmup enrichments. i believe i still have the PNP defaults for those, i might have added a touch a fuel, shooting for a 12.5:1 warmup.