Ktreece777

I have the REVi intake and thats the only mod I have. My problem is that when I am up high in rpms and punch it to redline it feels like I have lost alot of power and then sometimes the check engine light blinks for a little bit then goes off... Anyone experienced this problem?


ONE OTHER THING! : When the car starts I also notice it takes a little longer before it fires up

Phantom Menace

does that intake require modifying the ECU? Maybe it's leaning out your mix?

Red Devil

No it doesn't. Misfire would be my guess also. Check coils and plugs.

maxxdamigz

iTrader: (1)

Go to an advanced auto or some other chain parts store. They will usually pull your stored ECU codes for free in an effort to sell you the junk you "need" to "fix" it. Once you know what the code is, diagnosis is much easier. I used to get codes pulled at AutoZone all the time. A shop might charge an $80 diagnostics fee. The nice code machines are wicked expensive.

mysql101

canscan costs about $120. but you'll need a laptop to use it.

scangauge 2 costs about $155, it has a lcd screen but its functionality is more limited than the canscan. It's standalone so that's why I own one.

both will let you read and reset CELs. Very useful rather than waiting around and guessing what might be wrong.

expo1

Doing that with a low amount of fuel can also cause the misfire. Try it again with a full tank.

MadDog

Flashing CEL indicates a misfire and will not store a code - at first anyway.

Check plugs first. Then coils.

StealthTL

iTrader: (1)

Sounds like my problem, now cured - a few corners at 6k then punch it, it misses.

Mine was a weak fuel pump, but one thing to check would be the little vacuum tap under the throttle body, if you have a REVI it should be capped off, maybe they missed that.

S

h-khunterkiller

i had and have the same problem half an hour after heat soaks the components the fuel pump starts acting up

Paul_in_DC

You can buy OBDII/CAN readers for as low as $50 that will read the codes and reset the CEL. What do canscan or scangauge do that the low-cost readers won't do?


Oh yeah, and misfire CELs are very common at the track for RX-8s.

mysql101

Well, first you have to be careful about the low cost readers, as being ODBII doesn't mean much, it must be able to use CAN or it will do nothing.

Both the canscan and the scangauge (with optional upgrade) can log information and allow you do monitor and tweak settings for things like the CZ. You can also read from pretty much any sensor in the car. So it's more than just a CEL reader.

The scangauge II allows you to pick up to 4 of the sensors it reads and display on the screen. So for example, you can monitor ignition timing, mpg, intake temp and coolant temp.

I picked the SGII because it's powered by the obd2 port, and has a built in screen, so there's less wires and no need for a laptop or pda. Mount it on the dash and i'm done.

mysql101

here's the canscan:

http://www.obdscan.net/canscan.htm


here's the scangauge II:

http://www.scangauge.com/

Charles R. Hill

iTrader: (7)

How does either of those compare to the new MSD Dashhawk?

mysql101

DashHawk looks like it has a nicer screen and a few more options, but i've never seen it in person and have no idea what the price tag is.

Charles R. Hill

iTrader: (7)

MSD says that the Dashhawk gathers not only engine data and code info but also measures 0-60 and 1/4 mile times. The problem I have with these types of performance meters is that they access the wheel sensors for acceleration times, thusly assuming 100% traction through the run. Unless I am wrong and they have accelerometers built-in. Then I am the one doin' the assumin'.