SCT Pro Racer/Cold start issues/what to change...
- Thread starter unity
- Start date
Unity, it's hard for me to get my mind wrapped around the entire issue.
but I'm sure you have a good grasp on "what temps" this is occuring and what temps its "not" occuring at.
So look at those scalars and functions..look at the temps that the car acts "right".
Then move some of those values into the temp range that the car is acting stupid.
See how that plays out.
but I'm sure you have a good grasp on "what temps" this is occuring and what temps its "not" occuring at.
So look at those scalars and functions..look at the temps that the car acts "right".
Then move some of those values into the temp range that the car is acting stupid.
See how that plays out.
unity
Dedicated LVC Member
Well like the thread says, its a cold start issue. So to recap there are two things happening when it does not start, cold engine in cold conditions. Once started it idles smooth as ever and runs fine.
I think you were right on about the crank parameters. I should have but never did look at them. I was hung up on fuel tables. Its been warmer lately, but once again it started without an issue this morning.
I will probably leave things where they are for now until it gets consistently below 20 degrees for starting condition. But so far its starting better than ever in these temps.
So at this point it looks like too much fuel was being dumped in at temps below 40 and 20 degrees. Adjusting both injector pulse widths is all I did. Fuel tables are not used for starting is now my understanding.
no thats not right either.
the base fuel table cold is used..
what I was saying is look at crank fuel and look at the temp ranges where the car starts and runs right, then look at the temp ranges where the car doesnt start and run right...
the differences are staring you right in the face.
go into the colder temps and make the values similar to those in the warmer temps and see if it has any effect.
since it isn't going to be cold enough, you could do the opposite and see if it does the same thing in these warmer temps, move the values from -20 and below up into the range the temps are now and see if you can make the car act stupid.
the base fuel table cold is used..
what I was saying is look at crank fuel and look at the temp ranges where the car starts and runs right, then look at the temp ranges where the car doesnt start and run right...
the differences are staring you right in the face.
go into the colder temps and make the values similar to those in the warmer temps and see if it has any effect.
since it isn't going to be cold enough, you could do the opposite and see if it does the same thing in these warmer temps, move the values from -20 and below up into the range the temps are now and see if you can make the car act stupid.
unity
Dedicated LVC Member
Sorta related question. Is it possible to "flood" a warm engine with too much fuel causing what appears to be severe timing retard and loss of power?
Its looking like I need to pull the injectors back across the board. its running very rich with the tables I have.
Also, is there a parameter for maximum injector pulse width?
Its looking like I need to pull the injectors back across the board. its running very rich with the tables I have.
Also, is there a parameter for maximum injector pulse width?