86 fiero

got it running last week, finished all the suspension today and brakes and finally drove it.

starts well , idles fine.. but has a wierd stumble at about 4K (I never took it higher)

here is my setup

D16Z6
450's DSM with resistor box
Xenocron basemap
2.5" exhaust , no muffler.
Ching chong intercooler
stock MAP
RB25 turbo
Vitara's


I drove it around the block once and it would die under load , I could def. hear the turbo spool , but 35-4000 rpm it just died , and even back fired once.

all the BS recirc vacuum ---- is gone , just vac lines from the waste gate to the intake , BOV and Adjustable regulator.


I have yet to install the pressure gauge at the rail , if the fuel pressure was too high would it cause the car to run rich?? I didn't get a change to put my wideband in yet , but wanted an idea of where to start.. We leave for flordia next Wed , car goes for paint on Monday.

Thanks

JM

86 fiero

plugs are new , wires are taylor 8mm jobbies , resistor box is good , no codes..

Does the speedo not working affect the motor (it doesn't work , not connected)


I worry that the Fuel press reg is cranked up too high. I have a gayge for the rail , still need to install it.

HMTdmc

solid cel and a rev limit of around 4000. The engine sounds like an old tractor because the ecu is running off of a smaller back up processor. things that cause it are forgetting to remove checksum from the rom and the stock map sensor seeing boost.