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

Drove home today for the first time in long while. My idle kpa was fluctuating around 45-50, so I think something is still off there. Also, it stalls when I come to a stop if I don't feather the gas and sort of ease into the lower rpms. The ase and wue are way off, but once it's warmed up and driving, it's alright. I've been playing around with mstweak3000 and reading up and how to set up the enrichments. I need to configure the bosch coolant temp sensor again, as it was reading high. At least I've finally made some progress .

Any tips on honing in the enrichments?
Currently, my cranking/prime table starts at 13.9 at -40F to 3.6 at 160F, increments of about .4. My warm starts are ok, but cold I have to feather the gas until it warms up. I remember reading that 20% of your req_fuel is a good warm cranking pw, and about 85% for cold. I figure I'll get the warm (160F) pw narrowed down, then set them all to that and start richening them as I need to.

Afterstart I have set to run for 10 sec, currently its an even 3% across all temps. Any suggestions on good starting points? I think for MS, not MSNS-e there is only 1 enrichment, as opposed to a table of temps/ % enrich, and about 20% is recommended. I guess start at 0 and work up?
Any tips for the warm up as well? Is this in addition to the ase? So I have the 20% ase + the say 120% warmp up? If I'm trying to tune the ase, do I want the warmup to be the same enrichment, say 20%ase at 40F, and 120%wue at 40F, just to make sure the ase is correct? or do I want the wue all 100% until I get the ase narrowed in? This would probably mean the engine dies every 10 secs, but if I get the cranking pw and ase correct, and the engine reliably starts and runs for those 10 secs, then I can move on?

Guess it takes a little playing around to find a balance between cranking and ase, and then warmup as well.

Also, how does your map respond when your sitting in your driveway? If I stab the throttle I see the map spike but even if I hold the throttle it dips down to even 15-25. Is this because there isn't a load on the engine?

The car sounds really good. Gotta love the open air filter, especially when the second butterfly of the throttle opens.
Thanks for any information.

edit: FYI the car is a 91 VW Jetta with a 2.0l 16v engine, if that matters

Hey dude.

Also, how does your map respond when your sitting in your driveway? If I stab the throttle I see the map spike but even if I hold the throttle it dips down to even 15-25. Is this because there isn't a load on the engine?

Thats very normal. low kpa because there's low load (or no load pretty much... just overcomming internal resistance)

apart from that... well I have same questions regarding WUE and ASE. What I found on my car that it likes alot of ASE when cold, but when hot does not need any ase. If you dont have ITB's and some hot cams then you dont really need ASE. or have it very low.. like 5-10% for 100 cycles.... thats what I use.

However, i have hard problems keeping rpm low at cold idle. if i put more fuel in (trying to richen it up), it just results makes engine idle higher. I got PWM idel valve, and when hot it's 10% open, and when cold i have it set for 30% open and still idles high. I might try removing it alltogether and just use set throttle plate.

I think something is still off there. Also, it stalls when I come to a stop if I don't feather the gas and sort of ease into the lower rpms.

I kinda have similar problem. My engine doesnt stall tho (i give it more ignition timing/fuel below idle and that seems to recover it every time), however when I freerev the engine and then relase the throttle, rpms go below idle and then kinda roll around idle point until they stabilize....

I've been messing with the settings some, and the car warms up a little better. I was wondering what typical settings other people have? I'm finding my wue is something close to 120% even at 140. I need to recalibrate my clt sensor, as it does not seem to be very accurate, so this would cause problems. Just wondering what is typical for others.