MicroSquirt.com read only forum (Jan.15,2018)

i was wonderin if someone could look at this datalog and see if you can find anything wrong with it.. cause im stumped..

2.4tneon,

It looks okay to me (for just cranking), what problems are you having?

Lance.

it wont run. i can turn the car over and i know fuel is getting in the cyllinders but it wont fire up.. after i turn it over ill unplug the injectors and turn it over and it will run and burn off the fuel sill left in the cyllinders..

it wont run. i can turn the car over and i know fuel is getting in the cyllinders but it wont fire up.. after i turn it over ill unplug the injectors and turn it over and it will run and burn off the fuel sill left in the cyllinders.. maybe its not squirting while cranking but on the mt it says the injector pulse is at 5ms while cranking..

Obviously it is squirting while cranking, because when you disconnect the MS computer, it runs on the remaining fuel in the intake -- that fuel must've been squirted in there while you were cranking, right?

So, we can assume that "flood-clear mode" is NOT engaged, since it does appear that you're getting fuel in there while cranking... (That's a good thing.)

My very-large V8 engine (6.4 Litres) takes only a 4ms pulse to crank -- you're cranking with a 5ms pulse on a 2.4L engine, right? It won't start on this 5ms pulse, but then does start when you disconnect the MS computer -- so it really sounds to me like you're squirting way too much fuel in there during the cranking-time. Try cutting your cranking pulse down to 2ms or 2.5ms and see what happens.

i cant figure out how to get the injector opening time while cranking to go down to like 3ms like you were saying (imacneill).. the "cranking settings" and the "more cranking settings" boxes dont have anything where u can change it.. i was changing stuff but it still stays at 5ms to 5.6ms

What processor and code version are you running?

im using.. MS1 processor on a V3 board.. and 025V2 code

I don't know if you're running the Bowling and Grippo code or the MSnS-Extra code, so here's instructions for both.

For the Extra code, go to Crank/Warmup, then Cranking Settings and then you will have a list of cranking pulsewidths for various temperatures. Reduce the one that's closest to the the temperature where you live. Once you get the right value, adjust the others to similar values, remembering that at higher temperatures, you need less fuel.

For B&G code, go to Tuning, then Warmup Wizard. Cranking pulsewidths are in the top right corner, one for -40F and one for 170F. These values are used to determine the pulsewidths at any other temperature. you need less fuel, so try reducing both of them.

Fred

fscott wrote:For the Extra code, go to Crank/Warmup, then Cranking Settings and then you will have a list of cranking pulsewidths for various temperatures. Reduce the one that's closest to the the temperature where you live. Once you get the right value, adjust the others to similar values, remembering that at higher temperatures, you need less fuel.

in my megatune.. there's a section on the left that has like 10 different degrees that you can change the pulse widths.. but i "think" its in percents.. and how do i know how much to lower it.. and can i "just" lower one of them or do i have to change them all? (in the cranking settings)