[urq] EFI + MAC-14 maxing ataround 5k RPM

Ben Swann benswann at verizon.net
Tue Oct 23 16:56:13 PDT 2007

Engine is set to normal valve/cam timing with respect to crank.  Distributor is dead
center of window - I already played with that, and makes no difference until you put the
distributor completely out of window and then the engine dies, which is what I expected.

WBO2 on the way.  

I think I noted a sudden leanout on O2 meter while driving it today when problem
happened, which gives some credence to the lack of fuel.  I just don't understand why
this would be happening when the injectors are supposed to be capable of something over
300HP and I'm probably doing about half that.

I need to get some fresh logs before enquiring from the motorgeek and megasquirt forums.


-----Original Message-----
From: Ingo Rautenberg [mailto:ingo.rautenberg at gmail.com] 
Sent: Tuesday, October 23, 2007 7:13 PM
To: Ben Swann
Cc: 'mike schowengerdt'; urq at audifans.com; quattro at audifans.com
Subject: Re: [urq] EFI + MAC-14 maxing ataround 5k RPM

Hmm.  IME (sorry, stock CIS for now), 5k cutout can be either fuel  
starvation or not strong enough spark.  You got a wideband o2 sensor  
hooked up to that thing yet, Ben?  Which plugs are you running?

Now the really silly question (sorry, couldn't resist):  Didn't  
advance the cam timing, did we?

Hope you find your answer sooner rather than later (have you checked  
with the guys on Motorgeek yet?).

Good luck and let us know how it goes


On Oct 23, 2007, at 6:14 PM, Ben Swann wrote:

> So I don’t know if some setting can be changed to compensate or I  
> need bigger injectors.
> I’m still on the megasquirt learning curve.
> Or is it ignition?
> Ben

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