Jump to content
  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

2002 Megasquirt EFI Turbo tuning questions


Nateb603

Recommended Posts

15 hours ago, Nateb603 said:

For the homing steps I got a number of 160 fully closed which showed 0 on the gauge and the valve step number of 140 to fully open.  This is the setting I'm getting confused on and I'm still not sure what the tuner studio setting should look like.

So there's three settings here that you need to sort out: wide open steps (sounds like 140 for you), homing direction (open or closed), and homing steps (probably 160 in your case). So, what happens is as follows:

 - The pintle first runs the number of homing steps in the homing direction. So if your homing direction is closed, it'll run 160 steps in the closed direction.  Homing steps needs to be bigger than total steps to make SURE it gets all the way closed.

 - Next, it will run to the position (i.e. open up) set in your cranking curve for starting.

 - Once the engine starts, over the crank-to-run taper time it will move from the cranking position to the position given in the warmup curve, and then keep following that curve as the coolant temp comes up.

 - GENERALLY, closed position = 0 steps and your fully open position would be that 140 steps, but this is one of the things you really need to double check to make sure, because it can get backwards if you flipped either the Coil A vs. B OR the 1 vs. 2 wires when you wired everything up.  If it just doesn't ever seem to do what you want, try changing the homing position; I home open instead of closed but can't honestly tell you if there was any real reason I set it up that way or not.  At any rate, here's what mine look like for reference:

image.png

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Upcoming Events

  • Supporting Vendors

×
×
  • Create New...