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Old 07-19-2008, 08:32 AM   #2
i3litzace
 
Join Date: Nov 2007
Location: Boston, MA
Age: 36
Posts: 16
Trader Rating: (1)
i3litzace is on the path to ruini3litzace is on the path to ruin
Unhappy

Quote:
Originally Posted by renegade_ewok View Post
Trying to diagnose this issue as its just kind of annoying right now. Heres all mods basically that could be relevant...

- Nismo 555cc injectors
-300zx mafs
-Jim wolf retuned ECU - chipped for injectors/maf
-Greddy Intake, FMIC, BOV (vented)
-3" TBE
-HKS Step 2 Cams 264/272
-300zx Throttle Body
-Turbo XS Manual Boost Controller

Essentially what happens when I drive around in the 2000-2500 RPM range before I hit boost, on partial throttle, is some bogging/hesitation. The car will just feel like it is hesitating and won't feel linear. It will buck a tad too. If I let off the gas and get back on it, it is cleared up usually or if I get on the gas hard and hit a few psi of boost it clears it up significantly. Sometimes it never happens, sometimes it happens every gear but as soon as I get past 2500 the hesitation never exists.

Car was run at 10-15 psi and it exists at any boost level.

My first guess was that this would be the vented BOV richening the car out and making it bog... am I right in that assumption? I know throwing a wideband on the car would basically tell me if I was right or wrong, but I don't have one of those nor the money for it. Should I get someone to recirc the BOV for me and see if that solves the issue or could it just be a shitty tune? Don't know how good the jim wolf tunes are as I bought the car with it.

I am having similar problems with my s14 sr20det. Keep me posted i want to know how this gets resolved. The only difference is that i would get back-fire through the exhaust when i upshift.

when i checked the factory service manual it said to check spark plugs first then check the heated O2 sensor and canister purge whatever that is. last step is to check for air intake leaks. i just got my spark plugs and while i go in there im going to check my coil packs for problems and check for leaks and the type of fouling im getting.

If the spark plugs and coil packs are good then im going to check my injectors and o rings for leaks...

If anyone has had similar problems or solutions let me know
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