Supercharger/Dyno Disappointment - Page 2

audioserf · 04-30-2009, 09:12 AM

Quote:

Originally Posted by Pacemaker_Guy

Does the car feel any different?

Could be a defect with the unit itself?

That's what's even weirder. The car felt TONS faster when I picked it up, and when driving around all day in it. The pull was beyond anything I'd had before. DAYTA rode in my car and said it felt fast, and Excelerate (maybe jokingly) said it felt faster than DAYTA's did when he first put in the blower. Unless my car has been making 150whp for the last two years, I don't see how I can be putting out such shitty numbers.

After the CEL popped up, the car feels very sluggish and definitely not as smooth as it was earlier yesterday. I'm getting the CEL, so I definitely need to replace that sensor/sensor wiring.

evertp1 · 04-30-2009, 09:26 AM

is it possible we can get another opinion from another 04-05 TSX owner with supercharger??

Also audioserf is your car auto or manual?

audioserf · 04-30-2009, 09:36 AM

Manual.

I haven't seen a manual 04/05 TSX with bolt-ons dyno under 240whp or so. Autos tend to fall in the 225-230 range.

Something is definitely wrong with my car/setup.

xjohnkdoex · 04-30-2009, 09:58 AM

sorry to hear audioserf. it's the worst when you have all these expectations in your mind and then something gives.

i'm sure you'll figure it out. good luck.

DAYTA · 04-30-2009, 11:27 AM

Well, my timing peaked at 21-22 but it started around 17-18 degrees and increased progressively to redline as it should. Also, I wouldn't say your torque curve tanks @ 4500, but it doesn't look right since mine peaked at 5000. I highly doubt it has anything to do with coolant/engine temps, otherwise your engine temp gauge should've said otherwise.

I'm not sure if the problem is exclusively with the knock sensor either. Both your hp and tq curves looked like solid linear progressions, they just had a smaller positive slope. If the knock sensor crapped out, I feel like your curves would've been much more erratic than they were. Truthfully, I really wouldn't be surprised if the initial cause of your problems was a bad tank of gas like we had talked about.

When you were pulling solidly on the highway coming back from Josh's, that was before you filled up with gas. After you refilled the tank, it would probably take a few runs before it affected performance (i.e. right around the time you put the car on the dyno). I don't think it's coincidental that you threw a CEL right after you came off the dyno.

audioserf · 04-30-2009, 11:28 AM

I spoke to Josh/Excelerate. He thinks the bad gas theory is a solid one. He recommends I add some octane booster (and top off with 93 from another station) and drive gently for 15 minutes or so to cycle the fuel + booster. At that point, I'll clear the code, and keep driving. If the code returns, then we're replacing the knock sensor.

a2dadamm · 04-30-2009, 12:15 PM

im not positive on this but if/when the knock sensor shits the bed wont it not let vtec open? i believe this is how it works with regular vtec engines not sure with i-vtec. I could be wrong all together, but if im right and you car is still opening vtec them I would cancel out the knock sensor being bad. but then again u have the CEL for the sensor..

I dunno man, good luck hope u get it figured out.

Could also be the bad gas. was it sitting for a while? and whats the milage on your motor..

audioserf · 04-30-2009, 12:35 PM

Yeah - and that's what's happening now. The CEL came on both times at 3k RPM, which is where the SC Reflash puts the iVtec change. The knock sensor won't let it open iVtec, in hopes of protecting the motor from knock.

The car hadn't sat. I drove it home from Josh's shop and it was fine (this was on gas I already had in the car). I put a half-tank of Shell 93 in by my house before heading to the dyno.

53.5k miles on the motor, not a single problem before as long as I've owned the car.

I'll try Josh's recommendation, and if it doesn't solve anything, I'll have him replace the knock sensor and then hope for the best.

a2dadamm · 04-30-2009, 12:48 PM

Quote:

Originally Posted by audioserf

Yeah - and that's what's happening now. The CEL came on both times at 3k RPM, which is where the SC Reflash puts the iVtec change. The knock sensor won't let it open iVtec, in hopes of protecting the motor from knock.

The car hadn't sat. I drove it home from Josh's shop and it was fine (this was on gas I already had in the car). I put a half-tank of Shell 93 in by my house before heading to the dyno.

53.5k miles on the motor, not a single problem before as long as I've owned the car.

I'll try Josh's recommendation, and if it doesn't solve anything, I'll have him replace the knock sensor and then hope for the best.

yeah man ur motor should still be in good shape with that milage,

also how are your plugs? maybe there fouling out and your loosing spark? i'd check them to see and maybe put some new ones in anyways and go from there

audioserf · 04-30-2009, 12:53 PM

Quote:

Originally Posted by a2dadamm

yeah man ur motor should still be in good shape with that milage,

also how are your plugs? maybe there fouling out and your loosing spark? i'd check them to see and maybe put some new ones in anyways and go from there

Plugs are brand new (came with CT-E kit), but if my octane booster experiment fails, I can definitely pull them and have a look. It's worth a shot.

chuson · 04-30-2009, 01:23 PM

What other mods do you have prior to SC? 6MT should put down more than that at least 220whp+; hopefully the sensor is your only problem. Good luck.

audioserf · 04-30-2009, 01:26 PM

Quote:

Originally Posted by chuson

What other mods do you have prior to SC? 6MT should put down more than that at least 220whp+; hopefully the sensor is your only problem. Good luck.

Check the OP; I also have Injen CAI, Topspeed header, RT cat and Tanabe MT catback. I haven't seen a 6MT with boltons put down under 240whp, so yeah, something's afoot here.

I'm hoping it's just the knock sensor. Thanks for the comment.

a2dadamm · 04-30-2009, 01:36 PM

Quote:

Originally Posted by audioserf

Check the OP; I also have Injen CAI, Topspeed header, RT cat and Tanabe MT catback. I haven't seen a 6MT with boltons put down under 240whp, so yeah, something's afoot here.

I'm hoping it's just the knock sensor. Thanks for the comment.

grrrrrr i was gonna say check your cat to see if it was clogged but i just saw ur running and aftermarket one so im oretty sure that wouldnt be the case.

Im really thinking it's the knock sensor, I dont think the gas could be that bad that soon unless u pumped it from a deserted station in the desert and it's been there for like a year. lol.. this is bugging me haha and its not my car... fuel filter/air filter arent blocked up any.. im tryng to think of small things ...

ExclusiveTSX · 04-30-2009, 01:38 PM

Could it be a problem with the dyno? I mean you said it pulled much harder now..

audioserf · 04-30-2009, 01:42 PM

Quote:

Originally Posted by ExclusiveTSX

Could it be a problem with the dyno? I mean you said it pulled much harder now..

Possible but unlikely, especially considering I threw a CEL. That can't be a coincidence.

Also, as DAYTA pointed out to me -- my torque numbers, while a little short (5-8wtq) are nearly where they should be, which would explain why the car feels like it pulls harder than it was.