10-8-10-7 boost???
I'm currently getting a 10-8-10-7 boost pattern.
After 4500 rpms, I drop to 8 and quickly go back up to 10 like I am supposed to. However, the boost immediately drops to about 7 after that (probably by about 5000 or 5500 rpms). My only mod is a dp. Anyone else have this problem before? I'm hoping someone can narrow it down for me before I go checking the whole system. Thanks, Matt |
Check the classic culprits: crossover tube from y-pipe and it's couplers. Sounds like you're a likely candidate.
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My car always did that from day one. I think its suppose to infact. With all the mods i have on my car, my boost pattern is still a 10-9-10-9. It seem like the efini y pipe brought it up 1psi or so at redline. CJ
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I got a same problem.
and my car not getting full boost(7PSI) before car warms up is it normal I think it's double throttle but not sure. someone help!! |
HOw much is the efini Y-pipe? and where should I get one at>?
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It could be some check valves, the valves may not be holding enough pressure or vacuum to keep the actuators open/shut for long enough.
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Factory spec says after transition you should see steady 10 psi boost untill at least 6500rpm and then it may drop to 8-9psi at 8000rpm (redline) stock.
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sounds like your main cat could be clogged as well
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