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Recent content by GeeXPee

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    Tire question

    Putting new tires on the GXP, don't really have the extra money to stagger with the 255/45, 225/50 setup. Pirelli has some 235/50r18s that are dirt cheap and I'm considering running these on all 4 wheels. Does anyone see any issues with that other than the understeer potential? Other tire...
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    Electrical buzzing noise in dash

    Weird electrical buzzing/humming noise coming from the driver side behind the dash wondering if anyone has experienced this or what. Sometimes it kind of alternates pitch reminds me of the sound a high voltage power line makes. When it's quiet in the car it's stupid annoying, any takes?
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    Missing bolts?

    I'm really hoping this is a dumb question but check out these pics and tell me that that isn't a missing bolt (trans mount?). I had this trans replaced about 2 months ago under warranty the shop has been so bad with attention to detail. I've been back 3 different times for my battery being...
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    MAF values for NA folks

    Curious as to what kind of MAF values NA people are seeing @ WOT (lb/min) on both the stock intake and/or an aftermarket CAI? Trying to figure out if I have something weird going on with my MAF.
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    tapshift delays

    Getting huge 2-3 second delays when tapshifting from 2nd to 1st as if I were engine braking. The car drops into neutral then slams back into gear. Any idea if this can be fixed with a tune or if I should be looking for wire issues. This trans has 3,000 miles on it...literally. Doubting it...
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    tapshift schematics?

    Having what I think are intermittent tapshift issues and I'm trying to figure out which wires carry the signals starting from inside the steering column. Anyone have a tapshift schematic that shows the layout from the inputs on the steering wheel to the ECM or TCM and then to the trans? Or can...
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    2011 Accord EX-L V6

    Background: 08' GXP, K&N Intake, Overkill tuned, currently throwing a P1516 CEL which is Throttle Actuator Position code. Did some data logging the other night and it showed @ idle I was 22% TPS and @ WOT I didn't break 81%. My OE modules are on the way back to Will and he's confident he will...
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    TPS janky

    Recently tuned the 08'GXP, did some data logging last night to figure out why I was throwing a P1516 (TAP CEL). Found out my TPS @ idle is 22%, also found out that at WOT I'm not even passing through 81-82% TPS. Now I'm new to the tuning world but what does this mean in terms of power loss...
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    P1516 after tune

    Anyone have any experience with this CEL? I own an 08' GXP, just bought an overkill tune and I've been throwing this code. I had it reset by doing an idle relearn but it comes back when I go WOT. GM said the actual vs predicted positions were off by 13% at WOT before they did the idle...
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    MAF screen damage?

    Being my sloppy self I damaged my MAF screen the other day, dented it in slightly in the center. It doesn't look like there are discontinous pieces, as in the mesh is still held together at all points. Wondering if anyone has any suggestions here. I don't really want to fork over the 130...
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    Altitude impacts

    Wondering if I'm going to run into trouble @ altitude (4500+ ft) on a 91 octane mail order tune from Will @ Overkill. The TCM tune should be just fine, the timing advance is what I'm concerned about, I've heard that people run into problems when using tunes made for sea level vs altitude. I've...
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    DOD engagement

    I've got an 08' GXP that is making a tapping/ticking noise coming from what sounds like the DOD lifter engagement. If I drop it into tapshift mode and put it in 3rd gear at low speeds it's extremely audible with the windows down. There is a little delay in the noise, probably 2-3 seconds...
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    LS4 air intake hard data

    Not sure if anyone cares but I've asked some questions of K&N regarding max CFM and the point of diminishing returns as far as air volume increases are concerned. Bottom line is that max CFM is 451 @ 6000 RPM, while the higher flow filter can provide 592.4 CFM the stock air box creates a 240...
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    Intake choices, new ideas...

    Did a lot of searching about various custom air intake setups for the GXPs, right now I'm mulling over a few different options in order of $$ investment and level of effort. 1. Increase the air inlet size + K&N panel filter. 2. Typical DIY heat shielded short ram-air cone intake type system...
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    Have I been wronged?

    So I've been having transmission, lifter, abs/tc/sc issues with my 08' GXP so I took it in to Pontiac since it's still under warranty. Since it was at 60k it was due for another tranny flush, filter replacement, so I told them to throw it on the list of things they were going to do to the car...
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