hosmer

iTrader: (1)

the car ran/drove/idled 110% on a hacked to hell harness with 2 OEM and 2 aftermarket injectors with all the emissions stuff removed


Pulled it all out in favor of a PFC with 4 RC 1200's...simplified harness, GM 3 bar map, all the Banzai harness', modified trailing coil (setup was used on another S5 FC with no issues)

Now the car sounds like its running on 1 rotor..SUPER rich (injectors are set on the PFC, and even turned way down to try to get it to run), cleared some of the smoke when I brought the injectors down, but runs exactly the same

PERFECT compression on both rotors as I'd expect because the motors been recently rebuilt/streeported/new 3mm seals

Tried both the GM and OEM MAP sensors on different vacuum points..no change

Injectors are brand new and not sticking open, the compression tester was dry after I pulled it from each housing

I can get it to start and run, it just sounds like hell...like a piston type motor with a miss

New plug wires, has NGK/R's in it

what else can I look for?

gxl90rx7

iTrader: (1)

well I hope you know you have to tune it first..


and 1200cc primaries why it idles and cruises like crap

fc3s91

iTrader: (23)

Just to let you know that no two engines are alike. I would post in the pfc section. You need to learn how to tune for those 1200cc injectors or send it to get tunned.
Thanks Robert

arghx

iTrader: (3)

1200 primaries is going to be difficult to idle lean (unless this car is on E85), it's hard enough with 850s or 1000's. set primary injectors to something like 46% with maybe -.60 lag. then you will have to retune everything. And if you have no idea what I'm talking about, take it to a professional.

Even better, put the stock primaries in. 550/1200 is plenty of fuel for at least 350rwhp.