So I have to replace my speakers, some are ripped, blown or other wiring issues.... BUTTT looking for a 4ohm setup that can drop in. I had to use spacers for my 60.9cs even though they were "shallow" rated

Any suggestions for the front speakers? As per Tim's recommendation I am not too concerned with the rears. I did previously have a foam baffle in place, but there was some corrosion that got to the speakers still, probably due to moisture rather than direct water contact. The MDF spacer rings I had in place turned to mush.

Thanks,
Asim

Another noted today, it can "come on" and "come off" without changing input or powering down the deck.

I was listening at low volume, trying to get it to "come on". One trick to get it to appear is turn the Bass + higher on deck (not sub level), then turn the volume up a little and wait for it to show up. Once its active again, turn the Bass back to 0. Continued listening at this medium/high volume for a little but until I turned it down at a stop light. When I brought it down, I noticed the sub disappear again.

Tips on where to start?

I have been noticing something about my subwoofer where it is intermittent. Not in the sense that its there for a minute then gone then back, but sometimes its non existent (powers up) but either has extremely low signal or isn't getting boost from the amp.

Then it can show up randomly either at next power up of the car, or it can just appear out of nowhere after being dormant for 30mins +.

I haven't been able to trace this down to anything specific.

I believe this occurred even before when I had two Infinity amps (one mono and one four channel).

Alpine 9886 deck
Alpine PDX5 amplifier

Could it be a voice coil crapping out?

They do smoke test?

They said I could do one if I really wanted, but didn't think it would find anything. I can get them to do it next time I am there.

I will try cleaning MAF sensor and Throttle Body

I do like Alpine, the Alpine amp has been working great since I switched to it. I'll pull the old speaker to make sure that its the speaker's problem, or if its something else (water?) before putting money on a replacement.

No Vacuum leak, shop did a test and couldn't find anything to it. The problem isn't so easy to reproduce. He did an idle re-learn which has improved the idle roughness but there is still some roughness at some points. Also, that issue remains when you let go of the brake and are ready to hit the gas, that hesitation.

I am thinking whatever it was the problem lies elsewhere, and the TSX IM has simple magnified it (but isn't the cause of it)

Some websites suggest replacing the vacuum lines one by one to find it?

nada

I'll unbolt it tonight and try to do the criss cross pattern hopefully to help seat the gasket. Most likely is I had some leak before which is amplified now... I mean because I did notice similar issues in rare situations.

Idle is rough too

I now have some sort of vacuum leak with this new intake manifold (or I always had one, but this is amplifying the issue).

Idle is rough, low throttle there is a pause where it feels like its afraid to go... Not sure what happened.

I tried finding the issue, to no avail. Sprayed brake cleaner to see if I could find the leak. Tightened bolts just in case...

I bought a new TB gasket, had to scrape off a little bit of the old one.

The Manifold gasket I used one that was provided to me by the seller of the Intake Manifold (it was sandwiched between the TSX injector base and the TSX IM) he sold me the full assembly.

Its possible that I didn't scrape off well enough when I took my original gasket off (there were a couple of chunks). Or maybe the one I used got damaged with all the time spent in the garage.

Any tips?

That sounds more like a vacuum leak, I think I just got one too after installing the TSX IM.

What I used to experience was on slight uphill inclines, light gas, low rpm, low speed sometime's you feel the car loses its life and its about to kick the can, but its a split second thing. Gives me fears because my car before this was a Civic which lost its 2nd gear and 3rd gear and would feel similarly before those gears wouldn't shift anymore .

I will try to diagnose and solve the apparent vacuum leak around the IM today

I think I have the same problem as you Jeff. Car is relatively new and not driven hard. Have noticed the same things in exhaust, intake manifold, the lag.

I have done only typical maintenance and nothing special.

I have completely installed it

Some problems: chunks of gasket needed scraping off (looked like they built grooves into the metal where the gasket was stuck)

My TSX IM didn't have two studs on it, so I'll need to buy two extra bolts, or the studs to install there. I couldn't seem to budge the original studs to move them over, probably are supposed to be permanent

Edit: Youtube'd "How to remove a stud bolt" and was able to transfer them over to the new IM.

I noticed a significant amount of carbon buildup in the old manifold, next piece (downstream of the intake manifold, that which isn't replaced). Is this a problem or normal? Should I do a seafoam?

Figured out my problem. I am not looking at the right parts at all that I was trying to remove.

The bracket is on the right near the TB just below, and its easy to see

EDIT: I got the bolt out properly.

Required use of deep socket, the extension and my ratchet.

10000000000000x easier than the wrong bolts I was going for before LOL