mrsteve

iTrader: (1)

You can run the IMRC connected with the standard boost pulley but the way Scalbert explained this to me is that once positive pressure is introduced into the manifold the benefits of the resonance is no longer a factor, especially if you are getting knock.

fsttyms1

I would fix the misfire first. I would replace 1 coil pack and work my way around with taht one to see if you can eliminate the misfire. Then i would install the SC

CleanCL

iTrader: (4)

my money is on coilpacks since the car has been misfiring before the blower.

CL FWD SPEED

can you check to see if the coils are bad by an ohm-meter or something??

SIRSIG

or you can unplug the connections while the engine is running. do it one at a time.

if you feel the engine surge as if it's gonna die that means the one you undo is OK, now, when you unplug the bad one the idle will stay the same, take that coil out and change it...

Accord_V6_400m

iTrader: (1)

Let me rephrase then, I was not talking about HBP applications, I was refering to the OP. Second, I still believe you can tune out the detonation with the IMRC, honestly its just the volume being changed. Saying that one person still has detonation on occasion without knowing what kind of tune, by whom and how good it is makes it difficult to generalize that the IMRC when left functional will cause detonation for those using the HBP and up.Every tuner is diferent and as such tune each car differently in respect to power, economy and safety.

Even Siggy as you quoted was refering to the original posters query.

Let me ask you this then since you believe the IMRC is so bad. What are the chances of the car detonating with the HBP application with the IMRC both always closed and always open?

The comparison im trying to draw should demonstate that the transition is the only troubling part to tuning, once done correctly you should not have any problems tuning the rest.

Even I NA have problems with my IMRC transition due to my tune but that because I tuned my car with it open the whole time and after whne I got it working on my swap the transition is still not smooth and if I seafoam my car it will misfire slightly around 3800rpm.

mrsteve

iTrader: (1)

There is detonation with the IMRC connected when using more than the standard boost pulley; sometimes even with the standard boost pulley. Tests have shown the the horsepower and torque difference between having the IMRC connected vs. disconnected with just the supercharger kit and HBP is limited to 1-2% and it isn't consistant; some areas w/o the IMRC functions better than w/ the IMRC.

Key difference is you make the same amount of power without the knock.

mrsteve

iTrader: (1)

For the resonance effect to occur within the manifold you need ambient pressure within the manifold and relies upon vacuum and/or the pulse of air.

Once you introduce positive pressure into the manifold the resonance effect created by the runners is greatly diminished especially on a supercharged car since the flow is a fixed rate. On a turbo car it would react differently.

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I am having knock at around 4500rpm and up by 6900rpm. my imrc is connected right now.

but i need to figure out why i am getting misfire codes p0300 and p1399 aswell as each invdividual cylinder. its amazing how well the cars runs right after i erase the codes. but withing a matter of minutes, the power loss is substanstial.

need to find cause of misfire.

fsttyms1

That only works if the coil pack is really bad. Sometimes you just have to replace one and clear the codes take it for the spin and drive teh way you would to normally get it to happen and see if it comes back. Repeat this step with teh new one till you find the problem coil

fsttyms1

Odds are its just 1 or 2 coil packs. Our cars throw the multiple misfire code very often when its just 1 pack.

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last nite it threw a code for cylinder 1 only. then it spread. so i dunno.

so it can be a bad coil but not bad enuff to check by removing it? that would make sense, cuz i checked each individual coil and got nothing, but if its bad enuff only to cause misfire, then that makes sense.

CleanCL

iTrader: (4)

just replace them all.

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gonna take off my cat off and check if its clogged

fuzzy02CLS

iTrader: (2)

There wouldn't be a reason your cat would be clogged. Not on a fairly new car.

mrsteve

iTrader: (1)

I don't know why people always assume there's something wrong with the cat.

Did you get that scan tool yet?

Paclark01

Instead of wasting time jerkin' with the cat... Check your coils. Follow the instructions mentioned above for checking a bad coil. Personally, I would replace them all, and call it a day.

Then go get a scan tool, or go to Autozone and have them attach a scan tool to the car.

Allout

I still think a compression test and leak down is in order too.

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this is the reason why i thought it could be a cat is thru searching:

http://www.acura-cl.com/forums/showt...ighlight=p0300

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i have a scan tool, but not the one that reads sensor values. yet to get my hands on the other one

mrsteve

iTrader: (1)

Autozone won't have the tool he needs.

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im going to check out a scan tool now. what sensors and what values should i be looking at

JBlueCLS6

iTrader: (2)

I see a new shortblock in your future.

fsttyms1

I would start there with 1 new coil and see if it takes care of it. Thats a good starting point if at first it was only 1.

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changed the coils, still coding

Accord_V6_400m

iTrader: (1)

Why would it detonate because the IMRC valve is open, explain that. It doesn't make sense to me.

Is it just me or does the dyno graph show the power of an NA TLS? Pretty crappy numbers for a SCed TLS if you ask me. I've seen a TLS make over 250whp NA!?

Not arguing to keep the IMRC open for more power except when under vacuum and off boost during crusing, I figure if you can tune the car with the IMRC safely then its a win-win siuation.

So I guess to get around this most people leave the IMRC valve closed by disconnecting it and preventing it from opening keeping their NA off boost efficiency and creating a safer more practical tune, altough why that is the case still eludes me.

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Ill be putting my comptech headers on today and doing some further diagnosing

Cocoa

iTrader: (2)

did you reset the ecu afterwards?

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well, no actually. just with the scanner i erased the codes. hmmm. i just noticed something with one of the coils. brb

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on cylinder 4 when i disconnect the coil, the surge isnt as noticable like the other cylinders. hmmm. even tho i replaced it?

could it be in the harness?

mrsteve

iTrader: (1)

Time for a compression test and then a full leak down depending on the results.

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what should the cylinder psi be for compression?

mrsteve

iTrader: (1)

220psi +/- 20psi

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thanx

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my headers are now in. my aem eugo is also in. my a/f is a flat 10~11.2 throughout the power band.

i am still getting misfires, but now only in cylinders 1,3,4,5,6. wierd why cylinder 2 stopped misfiring?

i am running pretty rich, and am thinking perhaps the densos are fouled out. ill order new ones and see what happens. other than that i am stumped as to why i am misfiring.

the only thing i havent checked yet are the injectors, but i dont see why it would be that.

fuzzy02CLS

iTrader: (2)

Your ECU could have a problem. I've heard of a few going bad & causing many problems.

horsepowercrzy18

very true it could be the ecu. i have an extra type s 6 speed ecu if you need it

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i also have an extra ecu, but if i swap out ecus i wont be able to start it cause of the immobilizer

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ill resort to swapping ecus as a last resort

fuzzy02CLS

iTrader: (2)

The immobilizer is a separate system. Swapping the ECU should not change it.