its warm and it just stops running...

[1.0littleturbo]

so i have the engine running and i am confused as to why the engine shuts off when its warm and has been running for more then 5 minutes.

as the water temp rises and the enrichment numbers fall as they should. the fidle shuts off as programed and the idle drops to a respectable level as the engine continues to run and complete its warm up.

at 160'F, the enrichment value is 103% and it runs well and the at the point that it switches to no WUE at 180'F.

at this point the engine shuts off and will not start until coolant temp is below that point and as soon as it reaches 180'F again it shuts off and i continue to rip out what hair i have left.

{anyone? anyone? something D-O-O economics...}

[bleoh]

Not sure what you are running but I would try increasing the VE numbers around idle and/or adding a little timing.

Follow the tuning manual, it covers it all.

Brian.

(relax..... I'm a professional)

[1.0littleturbo]

well, i don't want to add too much timing as the car is turbo'ed, but i will try the VE talbe and see what happens, thanks. i will keep you posted.

[devastator]

Adding timing at the rpm you idle at will not affect the turbo usage as long as you lock out your advance in the boost range.

[1.0littleturbo]

it will, i am running MS1 and although i have a factory knock sensor i still fear doing it...

[1.0littleturbo]

ok, so i am still having this issue. before it shut off this time i managed to tune the accel enrichments seemed good as i blipped the throttle it was nice and fast with no hesitation or backfires... the enrichments that seem to work are 0.2, 0.4, 0.6 and 0.8...

anyway, i went to pull the car out of the garage and see how it does in the fresh air and blip it a few more times and as soon as there was the slightest load on the car it stalled. i got it out of the garage with the revs at like 2500-3000.

it then stalled and i had a heck of a time trying to start it again...

this is where i am at as well as being at the point where i am about to give up...

i am getting upset with the number of answers to posts like this saying that the info is in the manual and that i should look at it again...

[Gokart]

MS1, MS2?
code?
What car?

I had the same problem with MS2 with 2.0.1 codes for 6G72.
The warmup enrichment tables is effecting the condition.
So, there are some mix up of tables usage with this. The
fuelling also drops with temperature and eventually shut
off the injectors. However I was only testing this on stim.

[devastator]

Did you try adjusting your VE table and timing at low RPM? It seems as though you are just running too lean once the WUE and ASE run out. This indicates too small values in your lower VE numbers. Also, you have not mentioned much about the rest of your set-up. Manual tranny or automatic? How many injectors and what type? What does your timing read at low RPM? Do you have a datalog we can look at? Did this engine run with a carb before the MS conversion? Are you using an O2 sensor? The ACCEL is going to change every time you change your VE table, so the numbers you present may not indicate correct AFR values at low RPM and kPa loads. Have you tried all of this with the FIDLE valve de-activated? I think we need some more information in order to assist you, without telling you to read the manual. Here's my guess thus far and with the information that you have given: Your VE tables are set too low and the engine is running off of the WUE and ASE adjustments. Once these "run out", the engine simply leans out and dies. It's hard to start after that because it cannot get enough fuel without cooling off enough to go back into WUE mode, thus adding the fuel you need to begin with. To use a carbeurator reference; you're running around with choke on and when it flips off, the engine dies 'cause the jets are too small. I hope this helps, and please provide more info and maybe even a datalog in the following message(s).

[1.0littleturbo]

the car, 1991 Pontiac Firefly turbo (AKA a 3 banger Metro to to some) we had the turbo model in Canada.
the MS box, MS1 2.2 fuel only and the engine ran on the stock ECU and injectors for over a year before i added the MS to the car. with MS i added 3 330cc High Imp. injectors inplace of the 180cc stockers.
i am using an LM-1 for O2 and the stocker O2 sensor for referance as well.

what i am getting from your reply is that i should increase the numbers in the VE table by X and reduce the WUE so that it will run normally when the WUE is at 100% and the coolant temp is above 180...

is that a correct assumtion?

[devastator]

Yes, that is my thought. You could always start the engine and run it until it warms up, and then start messing with the VE table. If this work, you'll have to change your WUE and ASE settings afterwards.

[1.0littleturbo]

ok, i will try this tonight when i get home from work...

now, my one question is, what is the conection between how your VE Table is adjusted, like all numbers are scaled by 5 points in each bin and what the new WUE values will be? or are they too many variables involved?

[devastator]

That's a tough one to answer. I would adjust the VE table and then scale the WUE by the same percentage. I'm sure there's a bunch of math you could do to calculate this more accurately, but in the end, you'll end up tweaking these values anyway. I find myself changing the WUE every time I change the VE table. I'm running MS2 so I don't know if MS1 has ASE or not, but I'd adjust there too if you have it. The combination of ASE and WUE can really richen up your mixture.

[1.0littleturbo]

yes, MS1 has ASE. i will adjust all three values and see what happens...

thanks for your help.