tbauer

Hi, just finished my first rebuild. I have a 13b turbo, 1991 so i believe its an s5. Upon dis-assembly I found that the apex's were damaged. Everything else was ok. So after the basic rebuild, (meaning i bought the basic kit gaskets, seals etc,) I stuck it back in my sandrail. It had a old Haltech e6k. I replaced it with a Sprint 500 re so that I could use my lap top to set it up. I tried all the DOS crap with the older version without any luck. Engine runs fine. I have 92 lbs compression in each rotor,+ or - 2lbs. The issue i have is each and every time my turbo reaches 0 on the guage, i guess meaning 0 vacuum to boost, the motor hesitates out, you hear the release of pressure, then the engine runs fine. I can take the motor to the limiter was long as I do it slow enough as to not build boost. No matter what speed or load is on the engine, 0 vacuum to boost equals motor not liking it. I checked for leaks, tried with out the actuator, re-built the built in waste gate (had slop in the throw arm so now its nice and tight but smooth) with no help. Turbo I had checked, it is fine. I am out of my scope of knowledge at this point. I am a beginner and had no luck finding similar troubles on a single turbo set up.

Also if i put the peddle to the floor, the fuel is cut off to engine, I back off it comes back. I'm sure that's something in the computer I need to check on.

So any other advice would be appreciated.

Aaron Cake

iTrader: (1)

The Haltech needs to be tuned.

Don't drive under load until it has been tuned or you will end up rebuilding the engine again.