Z31 turbo help?
10-31-2012, 11:05 AM
#1
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Join Date: Oct 2012
Posts: 5
Z31 turbo help?
so y buddy has a z31 n/a to turbo conversion (vg30e) and is having a little bit off a problem with it. it runs and idles fine... but when he gives it gas it goes up quick to about 3k and then starts bogging down. its been doing this since he started messing with it so we went through and replaced a few things.. at first it seemed to be a fuel problem so he went out and got a walboro 255lp and new 440cc injectors.. installed them and is still having the same problem. we also change the mass air flow and nothing has changed.. just running out of ideas of what it could be.. but it really only seems to do it when it hits boost.
any tips are helpful thanks
any tips are helpful thanks
10-31-2012, 11:46 AM
#7
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Join Date: Oct 2012
Posts: 5
7lbs of boost... on a stock turbo and 37 for fuel pressure.. we were thinking we may have to actually replace the fuel pressure regulator.. could it be clogged? and would it cause it to bog like that.. im knew to z cars so i dont know alot about how they tick as much.
10-31-2012, 01:56 PM
#9
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Join Date: Sep 2006
Location: Mill Creek WA
Posts: 1,415
the ecu codes are seldom helpful but in the case of the CHTS just replace it. Did you run a line from the manifold to the FPR. the pressure on the fuel ring should rise with increased boost. My 86 T has 20 psi at 20 in HG. It rises to approximately 44 in full boost of 10 psi. and yes the injectors are way to big for your setup. You can't just slap parts on something without a basic knowledge of how the system works. you did I hope check for vacuum leaks which are the bane of the FI engine.
11-01-2012, 01:21 AM
#10
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Join Date: Jan 2005
Location: Phoenix, Arizona
Posts: 1,396
so y buddy has a z31 n/a to turbo conversion (vg30e) and is having a little bit off a problem with it. it runs and idles fine... but when he gives it gas it goes up quick to about 3k and then starts bogging down. its been doing this since he started messing with it so we went through and replaced a few things.. at first it seemed to be a fuel problem so he went out and got a walboro 255lp and new 440cc injectors.. installed them and is still having the same problem. we also change the mass air flow and nothing has changed.. just running out of ideas of what it could be.. but it really only seems to do it when it hits boost.
any tips are helpful thanks
any tips are helpful thanks
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