I fixed my knock sensor, and the car runs SO much better. But now the boost is building pretty slow (I dont really know what is supposed to feel like, this is the only supra I have driven) and I runs out of steam above 4500 rpm. A friend suggested that the DP cat may be clogged (already cleaned out the other one), anyone have any ideas? I will be getting a new exhaust next month probably, and if it is the cat, an exhaust would fix it, but hoping to make it a little more fun to drive for this next month. Thanks guys.
Slow spool and no power after 4500
- Thread starter vanman
- Start date
Just get rid of those blasted cats 
more power and emissions problems
Seriously though, an aftermarket DP will eliminate the 1st cat (normally the problemed child) and I would go with a test pipe but if you wish a high flow will work by itself fine as well.
On a relatively stock car I would say most of the time if its running out of steam at high RPM its probably a clogged cat.
more power and emissions problemsSeriously though, an aftermarket DP will eliminate the 1st cat (normally the problemed child) and I would go with a test pipe but if you wish a high flow will work by itself fine as well.
On a relatively stock car I would say most of the time if its running out of steam at high RPM its probably a clogged cat.
To test this, just pull off the exhaust at the turbo elbow and take it for a test drive. If it improves drastically, there's your problem.
shaeff said:and wear earplugs!
-shaeff
Dude, even running an open STOCK downpipe and cranking the boost to 11psi, you will scare the sh!t out of any Honda owner. It will be louder than any of their fart cans, but it will sound better and meaner. When the boost hits for the first time that you experiment with this.. well, let's just say that you need to bring a change of clothes, whether you skeet or crap your pants - or both.
haha! Ok, thats kind of what I figured, I am going to get a 935 DIY 3" here pretty soon, so I guess I will fix the other stuff wrong with it. I just blew a coolant hose, and I got to fix the brakes and a few interior issues.