I have a turbocharged 89 civic with a gsr motor in it.Its running a T3/T4 turbo with a drag manifold and its intercooled. I im using a vortech fmu and rc 310cc injector for fuel management . The ecu im using is a pr3 and im currently boostin 7 pounds. Timing is stock but im using a msd 6al with the boost timing retard

The car will not boost with the pr3 ecu. It feels like it starts to detonate once it hits vtec. But when i plugged in a ls ecu the car boost fine.I can take it all the way to redline. They are also no check engine light codes

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by carburatedb18c &raquo;</TD></TR><TR><TD CLASS="quote">I have a turbocharged 89 civic with a gsr motor in it.Its running a T3/T4 turbo with a drag manifold and its intercooled. I im using a vortech fmu and rc 310cc injector for fuel management . The ecu im using is a pr3 and im currently boostin 7 pounds. Timing is stock but im using a msd 6al with the boost timing retard

The car will not boost with the pr3 ecu. It feels like it starts to detonate once it hits vtec. But when i plugged in a ls ecu the car boost fine.I can take it all the way to redline. They are also no check engine light codes </TD></TR></TABLE>


What does your boost guage say???

 

7 ponds

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by carburatedb18c &raquo;</TD></TR><TR><TD CLASS="quote">7 ponds</TD></TR></TABLE>


So then you are running 7 lbs. with each ECU?? If so just use a P72 or P28

 

yeah its at 7 for both ecus . I cant run the obd 1 ecus yet need to convert it

 

so use an LS ecu