94 turbo not running after 4500 rpm

killjoysxe · Post by **killjoysxe** » 21 Apr 2012, 11:35

I have a 94 850 turbo, it will run fine up until about 4000-4500 rpm then just starts acting like its not getting fuel and wont rev any higher. It has no problem revving past 5000 in park or neutral, only when its in gear under boost.
I've checked the timing 3 or 4 times and almost positive its in time.
I've swapped out the ecu and injectors, no luck.
Anyone have any ideas what else could be the problem or where to look?

killjoysxe · Post by **killjoysxe** » 21 Apr 2012, 13:14

Idk if this is related but after i park after driving for a few minutes there is a hissing sound coming from the fuel lines near the fuel filter. i've looked and felt around but could not find where its coming from. Is presser build up in the tank normal?

Post by **jblackburn** » 21 Apr 2012, 16:27

Test fuel pressure at the end of the fuel rail while running on a hot engine.

I'm wondering if you have a bad fuel pressure regulator.

killjoysxe · Post by **killjoysxe** » 21 Apr 2012, 20:06

I fixed the fuel leakage problem. I found two broken lines behind the fuel filter
I'm still having the revving problem though. I'll check the pressure tomorrow sometime.

killjoysxe · Post by **killjoysxe** » 22 Apr 2012, 16:07

Now I'm having a problem with it stalling out when put into gear sometimes,
I checked the pressure and it was 55psi then i cleaned the pressure regulator out some then it was around 32-34psi.

killjoysxe · Post by **killjoysxe** » 28 Apr 2012, 13:34

What kind of fuel pressure readings should I be getting?