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test pipe/hfc hesitation

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Old 07-15-2009, 11:56 AM
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enjoichris01
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Default test pipe/hfc hesitation

Ok so let me first say sorry if this question has been answered time and time again. But I've noticed reading some of the threads a lot of people experience this hesitation that really had me worried. I am running aam test pipes, y pipe, and single exhaust and I've noticed whenever I nail it I get a lot of hesitation anywhere below 3k unless in first gear. What's the deal? What causes this? And would a tune help rid the problem or do I need to put my cats back on?? Thanks guys.
Old 07-15-2009, 12:48 PM
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Z1 Performance
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sounds like it could be running lean...get it on a dyno with a wideband and datalogger, and go from there
Old 07-15-2009, 12:53 PM
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Z_HighSpeed
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+1 to Z1's comment, probably running lean hence the hesitation
Old 07-15-2009, 01:20 PM
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BlueZ33
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i had this problem when i had only my tp's and the nismo exhaust minus the y pipe
once i got my nismo y pipe the hesitation went away
Old 07-15-2009, 03:19 PM
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davidv
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The mods altered the horsepower and torque curves. How I don't know.
Old 07-19-2009, 04:48 PM
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vrbigdish
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+1 to running lean, do you have a cel yet?? This happened to a majority of the members when just installing test pipes with stock exhaust. Happend to me also but once i got a true dual went away completely, would defiantly get rid of most of it with a tune or buy a true dual
Old 07-20-2009, 10:50 AM
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350ztttt
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exact same problem in the exact same rpm range.

fast intentions hfc's, turbo xs y-pipe and exhaust.

thinking of just getting fast intentions intimidator true dual to get rid of the problem.
Old 07-20-2009, 03:05 PM
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0jiggy0
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When I had stock catback with TP's I had the hesitation. When I put on my cutom catback it went away.
Old 08-05-2009, 11:10 PM
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Accordaleer
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Horribly annoying.
Old 08-05-2009, 11:47 PM
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jace350z
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What size single exhaust do you have?
Old 08-10-2009, 05:39 AM
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enjoichris01
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I am running a 3in single. And yes the test pipes caused the cel to come on within 3 days of installing them. I have considered getting a true dual exhaust custom made. But I really like the look of the single. But I've def noticed I lost my low end power for better top end and I miss that. Guess its time for a change.
Old 08-11-2009, 09:51 PM
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kramykram
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i have a fix posted for the cel. should try it you will notice a difference without that cel on.
Old 08-11-2009, 10:01 PM
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black06z
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3" is too big.
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