Well this is my first "winter" with the 550's and the past few nights its got down into the high 30's and my cranking settings suck and the past 2 days I've been tweaking them some.but only get 1 chance a day and I have to work early as hell in the morning and the miata being the DD heres my settings that start the car after a while the 60F up are good but when under that it blows! someone please post 550's with cranking and afterstart settings tested as low as possible maybe from last year, or if you live in Alaska

 

no one?

 

I won't post my table as it's not perfect for other than warm starts. Is your problem cranking takes too long or the car coughs then dies?

 

Well under 60F it does both, but I can't tell if increasing or decreasing is affecting anything. With only 1 try a day.... part of me thinks im putting to much in cranking but, then when I lower that It wont crank forever then when it does runs like the plugs are fouled. Then when I change it by .1 or .2 it still takes a while to crank and pops which from what Ive read means to high of cranking PW's Im tired of messing with it right before I go to work, and making me late etc... But anything over 60F is perfect instant start-up

 

pops mean it's too high and you're igniting large amounts of fuel.

the next morning you try it, first try starting low, like try 4.5, then work it up. if you start high, you flood the cylinders and it's almost impossible to start after that point without drying the cambers out.

 

I'm going through the same issue now but with 460 injectors. First winter with the MS in my '04.



The coldest morning I've had so far here in NJ is mid-40s. Car started on the second try. Not perfect but getting there.

Paul says maybe I made the CPW numbers a tenth or two too high, causing the fuel to be harder to compress (or something like that).

 

Mine cranks/starts fine (460s) but dies after 5 seconds or so on the first start. On the second start, it will stay lit. It does this every single time unless the ambient temps are real warm. The other thing it does is after it's started; I cannot touch the gas for some 30 seconds or so, otherwise it bogs and dies. After that, I can usually gently coax the RPMs up, and once over about 3,000 RPMs it will take any amount of throttle. After a minute or two of allowing the motor to warmup, the off-idle bog goes away.

I guess I need to spend some time with the warmup and/or after-start enrichments, but adjusting them either way doesn't seem to make a profound difference in behavior.

evank: Your cranking PW are quite a bit larger than mine. I think you could probably stand to pull several tenths from 0F and up.

 

I'm using paul's setting with great success so far down into the 30F's

 

Mine are less than what Pauls are and my car starts perfectly down to 0 on the first try.

Ill post when i get home.

 

0? It hasn't been down to 0 F since you squirted your car Sam so WTF are you talking about?

 

To all: post you inj. opening time too

 

I squirted it before the winter of last year and started it throughout the winter. Unless you are saying the temperatures never got that low between november and march of 07/08.

 

My cold start settings suck. So I just copied Paul's that johndoe posted and I'll report back tomorrow. I got remote start and every morning it takes 2 tries to crank when it's below ~70*F. My old numbers were definately smaller then Paul's, so maybe this will fix it.

 

mine usually starts ok, did so down to 27 the other day, sometimes(once or twice a week) though it will stop cranking for a split second like something's locked the motor and then continue to crank and start. my problem is my warmup sucks, even in the summer my idle goes from 1000-2000 until it's fully warmed, then it's fine.

 

Both the spin, spin, STOP, spin crank and the up down up down problem are both timing related. What timing map do you run?

 

I have the same issue(s).

What timing map do I run ..... hmmm ... how do I find out?

 

Temps never got that low in this area.

 

According to the weather record they did here.

 

lol. Do you have megatune and a laptop? Are you familiar with megatune/

 

Yup. booting it right now ... Prof. Paul did a good job teaching me how to log, tune, change boost duty targets, tweak crank pulse widths, etc. ... but we didn't get to the unit on timing maps yet.