Hey guys i could use some help here... since all of you have probably done several projects this might apply to you. Right now im running a dohc zc with a saab t3 turbo. Im just running 5 psi on stock injectors with an fmu. I dont even have my check valves on their yet and no downpipe or 02 sensor.
My problem is after i boost and then let off the throttle the rpms slowly drop all the way to 0 and my car dies. A friend told me my motor is getting to hot inside, Another guy suggested it may be a fuel pressure problem...
Also my turbo blows some white smoke out of the exhuast but i cant tell if im feeding to much oil or have a seal problem
any suggestions
thanks alot
mike

 

first suggestion: get some check valves and a downpipe with your 02 sensor hooked up. do you notice any oil leaking from your turbo or in your charge pipes? or is it just some white smoke.

 

yes i notice oil leaking in my charge pipes, and around the exhuast bolts of the turbo, however i noticed that that leakage was from two bolts being loose... but its not like white smoke being burnt from being hot... its being blown out powerfully from the exhuast side of the turbo
mike

 

yah! get those check valves on there, downpipe and o2 as well?!! im surprised you have no cel's !?!?

 

well, if it's not leaking anymore, it may just be burning up the oil that is left from when it was leaking

 

so the fact that these bolts are loose can be a possibility for the white smoke.... well i will clean it all up tighten up down good as i planned 2, get all my ---- on and boost again, by then the oil should have leaked out... btw i blew my oil feed line boostin last night, let it be a lesson to do it right the first time and use threads not clamps, lol
Oil all over the engine bay

 

no i do have some check engine lights... i think its just for the 02 sensor and 1 for cyl #1 sensor i believe my timing is a bit off...
ill be fixing those today as well

 

if you don't have check valves or a missing link, your getting a CEL for that also, and i'm sure that is why your car is cutting off, as soon as you hit boost, your map sensor is picking it up, you may also want to put a needle valve on your oil line so as not to have so much pressure. good luck, let us know how it goes.

 

for sure, you and this site are awesome, i love the quick responses, i will definitely let you know how it goes, where are you located
mike

 

mine does that too but i think it just dies because after full throttle the car cant idle because my throttle cable is worn out and sticky and the turbo is putting more backpressure on the engine at really low rpms so it just kills it.. but it has done it about twice.. its really annoying.