speedraceratl

OK here is the deal after much searching in the site I can not fond a satisfactory answer. So here's the deal:

Under 3400rpm I can hit 10psi all day long. Good fuel mixture and everything. However once I hit around 3400rpm fuel mixture leans out and boost shoots down.

From what I understand that the secondaries come on about that time while under boost. Is there anything else going on electronically or mechanically that would cause this issue? Sometimes the problem goes away for a little while just to let me have a little fun but then it returns just in time to spoil everything.

This is NOT 3400rpm hesitation. Car has less than 15k on the fuel injectors and the clips, and SAFC. Any and all help is greatly appreciated.

NZConvertible

That sound like the symptoms of a disconnected secondary injector. Since it's intermittent I'd bet it's a loose/dirty/broken secondary injector clip. If one secondary injector stops working that rotor will basically stop firing because the mixture will be too lean to ignite. Assuming you have a safe 11.5:1 mixture with both injectors firing, you'll have a 23:1 mixture if one stops, and that's almost impossible to ignite properly. The other rotor will fire normally so that lean mixture you read is actually the average of one rich mixture and one unfireable mixture. The drop in boost is simply because you've lost half the grunt going to the turbo.