Well got the car back today run perfect but when i floor it at 3500-4000 it stop going like im running out of gas. Any ideas why? I have a msd inline, 310cc injectors, Cartech Fmu. What can be the problem.

How much boost are you running? Are you sure you're not clipping your injectors? Do you have a possible boost leak? Hows your tune?

Well im running 6psi, Boost leak i doubt it its like the car pulls till about 3500 then it sounds like theres no more gas almsot like when you rev your car in park and it bounces off the limiter just like that i let off and it goes to the next gear untill 3500 and same thing.

running rich? running lean? (sounds like the latter). Lay off until you get a WBO2 reading.
Nice build btw



fortune cookie say:
better a delay than a disaster.

Well the car runs rich at idle because of the injectors but i dont know if at WOT if the fmu is doing its job.

My car did that when i first got it boosted around 3500, i tightened down all the clamps on the charge pipes and it fixed it, just a boost leak problem, pull your plugs see what they look like.

Emry

96 Camaro A4 383 12.5:1, E85, Full suspension, Nitrous outlet plate kit, hooker headers and catback, 3800 circle D converter.

2002 Silverado LQ4 6.0 CAI, Long tube headers, 4" exhaust

1996 s10- 97 ECU and wiring, soon to be boosted daily driver.

Do you have a boost guage? If so check to see what boost your at when its happening. What it sounds like to me is if your fmu is boost sensative, it raises the fuel pressure to compensate for each pound of boost. More than likely your hitting maybe 2-5 psi boost and the fmu is raising the fuel pressure, high fuel pressure + 310 injectors is flooding it out. You need to get the car tuned on a dyno and you'll be fine.



----> www.cnfxperformance.com

i had that same problem, i fixed it by changing my o2 sensor

have you check valved your map sensor?

Ok i ran it i uped the fmu it goes to about 5500 but it bogs right there. I pulled the plug and it did look a bit white. So any ideas with the fmu maybe?

okay try this regap your pluggs. or throw those away buy cold ones and gap at 25 that might fix ya



r.i.p rotary

If the plugs are white, try turning the little screw on the fmu clockwise. Get your wideband working!!!




275hp & 306tq - 1999 2.2 ohv
13.2 @ 108 mph
-1996 2.4 liter + Turbo + Built motor + Torco + More boost = Lots o' Power
-2000 Mustang GT + 2004 Cobra motor, Whipple 2.3 supercharger,
built rear-end,Dodge Viper spec T56 6 speed, bolt-ons = wheelies at the track!!!!!