Get a Megasquirt, You will love it, They said Options

[RickS]

Ok had a Megasquirt system installed on the 3.0. Much better throttle response and looks oh so sexy. Tuning was something else but it runs pretty well. Two issues:
1. After a cold start, the car is not drivable for at least two minutes, until it warms up. If you try to drive it cold it just stalls. Is this normal behavior?
2. The throttle is a tad touchy. Unless you slowly squeeze the throttle accelerating is like an on/off switch, with a millisecond of hesitation and then off we go. Is that normal or can that be tuned out?

[VaccaRabite]

1) This is a tuning issue. Do you have a modern AAR on the car? If so this is fairly easy to work out. You just tell the ECU to adjust the AAR for the "coolant" temp of the car (which is probably your head temp - that's usually how air cooled cars are wired for MS.) The AAR is a fairly crucial part, and is sometimes skipped. You can tune without one, but it gets harder. The AAR in a modern system is constantly adjusting to keep the car running at idle no matter what the engine temp is or load on the car is (lights and windsheild wipers and radio, etc. will drop your idle)

2) Issue 2 - do you have a wide band AFR? Do you have data logs? My MS2 car was doing the exact same thing, and the issue was unless the car was at WOT, it was lean. Lean enough that going from idle to part throttle the car would hesitate and sometimes try to stall. You want to be sure your engine is getting the same values that you have in your fuel table and your AFR table.

In my case I put too much faith in the fuel and AFR table and not enough faith in my actual LOGS that were telling me I was going too lean. Learn to trust your logs and use them to adjust your tables. Post up your log files (with AFR).

Also, you can save your MSQ file to your post. Do that too so we can see what you are doing.

Zach