shutter while cruising Options

[rjbibeau]

i just got tuned on thursday at the dyno...only made 6psi cuz i have a clocked turbo and the actuator the way i have it mounted must not be closing properly. i trailered the car back and took the car for a cruise on sat. At 3000 rpm i get this once in awhile occuring shutter like the throttle stops and then regains itself. probably a misfire. and then i can't go above 5,000 rpm it hits a brick wall. also it threw a CEL so i got to autozone today to see what code it is. it's a misfire cylinder #1 and also of a lean mixture. would this explain my symtoms. lady said it's probably your FPR...this will give you excessive gas consumption. could the the stock regulator give me these problems? or am i supposed to be running an adjustable FPR. I'll ohm test the wires to see if they pass. the plugs all look good and the cap and rotor are relatively new.

also a question on those AEM universal FPR. i undersand you have to set base FP at 43. i have been reading to use a 1:1 ratio....is this somehow incorporated into this unit or does it have to be manually set. i know the vortech FMU is capable of doing this but is the AEM the one i want?

This post has been edited by rjbibeau: Jun 7, 2008 - 12:48 PM

[lagos]

What kind of corrections were made to your safc during the turning?
My guess is that since you only hit so little boost, they had to remove a lot of fuel (air flow signal) and this is causing your ecu to give you a lot of timing advance and causing the missfire. You would actually be safer running more boost, and less corrections.

This post has been edited by lagos: Jun 7, 2008 - 12:55 PM