BigRedX

ok so im not new to rx7s just this one problem is new to me. i didnt notice this until i tried drifting it around a corner by my house. it cuts out if i either try to clutch kick or if i try to just get on it in a lower gear, like 1st or 2nd. but if i baby it i can make it to just 500 before redline. what could be some problems

BomberMan

iTrader: (4)

what car? not all rx7's are created equal.

BigRedX

oh my bad haha its a 1990 s5 n/a

BomberMan

iTrader: (4)

Agh, I'm not too sure on this actually. Does it feel like you are getting misfire? Or is the car just generally bogging down? If it is the n/a do you think the 5th and 6th ports may not be functioning?

blk87Turbo2

iTrader: (23)

Will the car rev freely when it's not under load (in neutral)?

If so, do you still have cats?

BigRedX

well like i said it pretty much just cuts all my power and feels like its about to die. how would i check to see if the 5th and 6th ports are functioning? and yes the car does rev freely when its in neutral and no its straight piped

XLR8

iTrader: (52)

I'm guessing a cat, fuel filter, or 6-port issue.

Clogged cats will greatly effect your top end. If they are original and you have some mileage on the car, I would consider replacing or removing completely. This of course depends if you have to pass emissions. www.rx7.com sells Bonez cats which work well.

Fuel filters clog over time. If you don't remember the last time it was replaced, then replace it. As fuel demand increases in the upper rpm range, a slightly clogged filter will reveal itself.

Finally, the 6-ports. You can tell if they are working by smearing some grease on the rod of the actuator. Take the car for a drive, and redline it under a load a few times. Check the grease to see if it's smeared. If so, they are opening. You can also try to work them with your fingers. The rod should contract easily with pressure from your hand. If not, it is carboned up and you will need to remove the intake manifolds to clean it up. I am in the process of doing the same to my S5.

These are the actuators on the LIM

RotaryRocket88

iTrader: (7)

Aux. ports are not needed to reach redline or beyond. They just prevent torque from dropping off as sharply. The grease test also doesn't really work on S5s, since the actuator rods push out to rotate the sleeves.

I've seen a number of threads where someone had a problem hitting a wall at 5-6k RPM, and in every case it was a secondary injector problem. A plug may be off or loose, the wiring may be damaged, or an injector may just be plugged.

Hypertek

iTrader: (3)

check the fuel sock on the fuel pump itself, i had similar problem a few years ago and it was the sock.

BigRedX

well if its nice tomorrow im going to check all these ideas out to diagnose this problem and ill be right back on here to either complain some more or im going to be thanking the heavans

walken

iTrader: (6)

from your first post my guess was you had a S5. when you confirmed it my guess was VDI not working.

BigRedX

i found that it was my actuators they dont open up my 5th and 6th ports so im awaiting my pineapple racing sleeves easy fix i hope