I am having a problem with my Vortech setup. At about 50% throttle I see the AF ratio drop to around 12.0 like it normally has done. But if I open the throttle up any more, the mixture continues to get leaner. At 100% WOT, the AF guage is reading a mixture of about 14.5 - 15. It is completely relative to throttle position and has nothing to do with RPMs.

It seems what is happening is that beyond 50% throttle, the fuel system doesn't deliver any more fuel to the engine than at the 50% point.

All of this has come after I got in an accident where I rear-ended someone. There was no damage to the engine bay, just the right front corner of the car.

*Edit*

The problem seems to be with either the Vortech provided FMU, fuel pump, or something on the fuel rail. A few moments ago I just completely took apart the FMU and inspected it for any problems. I put it back together and the car is still acting up.

My next question is this. What are the chances of the fuel pump suddenly lowering its output below spec? I have noticed that I no longer hear the fuel pump working as loud as I normally did when everything was running fine.

 

I see that you are runing the AEM ems, 3 sec to ignite, or a few more crank twists is normal with the AEM, you will get used to it

 

[QUOTE=S2000_Europe,Nov 11 2006, 11:21 AM] I see that you are runing the AEM ems, 3 sec to ignite, or a few more crank twists is normal with the AEM,

 

sounds like maybe your Fuel regulator got hit in that crash... either that or your fuel pump isn't running to full power.

thats my guess at least...