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Old 11-03-2007, 09:10 AM   #1 (permalink)
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Default need cold start schooling...

well, I have never actually had to tune my cold start settings before since until now the entire time I was using MS I lived in FL, and it never got cold enough to be an Issue, now I live in TN though and of course I have hard starting when it gets below 50 degrees, so I was wondering if there was a formula to make this easy for me or if its going to be a tedious trial and error thing, I guess if a couple of you posted your cold start settings along with injector type I might be able to figure out what mine should be
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Old 11-03-2007, 12:00 PM   #2 (permalink)
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ha welcome to the club. what kind of injectors do you have and fuel setup. well do it together lol
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Old 11-03-2007, 05:38 PM   #3 (permalink)
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well, I have stage 0 injectors right now....but by playing with fuel pressure I can get them to flow enough to pass as stage 1s(for testing until I actually pick up a set of 750s)

my settings are as follows

40 dgerees 6.5
20 degrees 8.0
0 degrees 10.0
-20 degrees 15.0
-40 degrees 18.0

though I dont think it ever gets below 0 here..
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Old 11-05-2007, 06:25 PM   #4 (permalink)
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how is that starting? i have shitty 19llbers and i cant get the settings right...even though i havent worked on it in a while because im at school and my cars not, but i will be switching to s1 when schools over in mid december
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Old 11-06-2007, 09:00 PM   #5 (permalink)
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well, I found out most of my hard starting was actually caused by a melted ground battery terminal!(how that happened I have no idea, but it starts a bit better now)
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Old 11-11-2007, 10:35 AM   #6 (permalink)
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I have my cold starts pretty good. I can go out right now and start the car and have it run. It hasnt been started for little over a month now.
Also it has 1000cc injectors in it.
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Old 11-15-2007, 06:22 AM   #7 (permalink)
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mine starts fine now...evidently it was a bad ground terminal(it melted) go figure
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Old 11-15-2007, 09:49 AM   #8 (permalink)
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All my grounds are fine, but mine is a nightmare(10seconds) to start. Just never got any training on what to try and set my stuff as. I have 750cc injectors set to a static 43psi.
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Old 11-16-2007, 07:26 AM   #9 (permalink)
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It's definately not rocket science. You just have to find the right combination of fuel for the mass of air going into the engine. It takes a lot of experimentation to get it right....
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Old 11-17-2007, 08:46 PM   #10 (permalink)
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Mine works pretty well and I'm quite a bit richer than that, but I'm burning ethanol, so I'm playing a different game, and it sucks to start even if I had the perfect settings.
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Old 12-02-2007, 09:50 AM   #11 (permalink)
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Hey, what are all of you .org'ers doing over here?!?!?!?

This type of discussion, along with one about my 4k hiccup are what I was hoping to have over there, and here it is all going on over here on the SRT-4 forum. . . What gives?

Anyway, I'm having a heck of a time getting the afterstart enrichment, warmup enrichment, first start enrichment, and fixed afterstart enrichment period working together so that I can get a single start when the CLT is below about 35F. From what I can tell so far, down to about 40-45F, it's not rocket science. . . . Colder than that, it just might be rocket science!

Anyone else deal with temps that cold and have a factory-like startup on the first start?

Thanks, and glad to find the location of the real tuning discussions!

Thad
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Old 12-08-2007, 09:20 PM   #12 (permalink)
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I only have one map that will even start. I think I'm going to burn out my starter and/or battery cranking it all day for it to finally start. I even have to give it a little throttle for it to turn over.
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Old 12-09-2007, 01:32 AM   #13 (permalink)
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do you guys have your iac hooked up?
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Old 12-09-2007, 09:03 AM   #14 (permalink)
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Stock ECU is controlling idle. I have 750s w/42 psi static on the return system.

I tried boost's msq modified for 2.4L NGC with 6.0 and 6.6 REQ_FUEL, and got nothing but white smoke out the exhaust.

6.6 REQ_FUEL = 2429cc displacement, 750cc injectors, 12:1 A/F.

What is the significance of the A/F for the equation? Is it asking the highest, lowest, or average A/F I want to run or what? I don't get it, so I've generally put in 12:1 cause I know that its safe.
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Old 12-09-2007, 03:05 PM   #15 (permalink)
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not sure about the a/f but i know that the stock ecu gets confused with the iac and messes things up and it would be easier to hook it up the ms to start it. i will probably be doing that in maybe 2 weeks when i get a chance
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