Cory Simpson

My car is hitting fuel cut out of 1st/2nd gear, it has a 3" exhaust (exept for 2.75 ID MP). I thought it would only boost creep to fuel cut with this set-up???


I also have apexi filters, and a PFC on the way, but I'm thinking I have another problem since it's still doing it, even after I rehooked the wastegate... I've heard people talking about "pills" Woule this affect the wastegate's operation? Or lead to fuel cut in anyways?


Also it won't go past .8 bar, which I think it normal??? And in 3rd gear, with a pull from 2500 RPM's it will fly to 100 MPH before I knew what was happening, and it didn't fuel cut! WTF????

adam c

iTrader: (2)

I would expect you to hit fuel cut in 3rd rather than 1st or 2nd. It sounds like you may have a different problem. .8 bar is around 12 psi (??) which is too high for the stock ecu with midpipe.

Cory Simpson

That would tikle me pink if it's not fuel cut. (unless it's something worse )


EDIT: Just converted it, and .8 bar-11.6 PSI....

Mahjik

iTrader: (1)

Fuel cut depends on a few things, here's the basic map:

http://www.scuderiaciriani.com/rx7/fuel_cut_info.html

sonix7

Mahjik for president!!! listen to him. dude knows.

Cory Simpson

OK, I now know that it's not boost replated! I capped the line that runs from the wastegate to the silinoid. And I'm now seeing intake manifold levels of .45 bar! Can't be fuel cut!


Maybe I put my boost guage in a bad place? It's a mechanical RE.... I put it on a vacume nipple on the upper intake manifold that was empty, had a vacume cap on it.... it is next to were one of the BOVs is. Bad place maybe? Even if it is, I can't believe it would be 50% off!

Mahjik

iTrader: (1)

Nope, that's a common location for a boost gauge vacuum line. Just FYI, I "Tee'd" mine off the MAP sensor line (IMO it better to see exactly what the MAP sensor is seeing).

So, are you saying the car is just losing power after a certain RPM range in 1st and 2nd gear but pulls just fine in 3rd?

BlueRex

EDIT: nm

Cory Simpson

I don't want to T the pressure sensor, because then it will distort the reading that the ECU see's.... Or that is what I think.


And yeah, it seems to only do it in 1st/2nd. The car isn't street legal (got no title, tags, or a windshield with no holes!!!!) So the only place I drive it is around the neighborhood, and on roads with little/no traffic. I've never gotten into high RPM's in any other gear than third so I'm assuming it's only 1st/2nd. Someone said it might be because of fuel temp/pressure??? Or something like that. It happens right around 4500 RPM's. Even with low boost!

Also, yesterday it wasn't doing it with the higher boost. It was running great/pulling strong, but I thought the clutch was bad (even though it was only the pedal being misadjusted ) so I took it home, and stopped messing with it. But today, I lossen the pedal and let the PP clamp all the way, and now it just looks power again.

I'm lost....

Mahjik

iTrader: (1)

It won't cause a problem with the map sensor. I'm some cases, it has provided a slightly different reading than the other location (which has been noted in some threads here on the forum). I'd rather error on the side of the map sensor myself.


I would check two things (in no particular order):

1. TCA actuator/solenoids
2. Secondary injectors

You are probably going to need to find a large open/empty parking to do some testing so you can see what's happening for sure.

Cory Simpson

Well.... I didn't want to, but I guess I have to pull the intake and check those.


Also is the TCA one of the large pods on the bottom side of the turbo's???

Cory Simpson

OK, the FD intake is wayyyyyy worse to take off than an FC's!!!


Also due to not seeing a couple vacume lines 3 nipples got broken I'm going to go ahead and put block off plates on, and remove the airpump while I got the intake off. But what do the two siliniods bolted directly to the upper intake manifold go to??? Each one has 2 vacume nipple, and one lost both, the other lost one.... Can I just remove those, Or are they important?

Cory Simpson

OK, if I'm not mistaken, the two silinoids I am refering to are the prespool/wastegate silinoids?


Damnit!

adam c

iTrader: (2)

I suggest that you take the car to a rotary shop in your area before you break anything else.

Cory Simpson

Bahhh, three nipples. I'm going to remove all the emissions crap anyways. even though the only things I broke aren't emissions....


And there is no rotary shops in/around Aiken! And I'm to cheap to pay someone for **** I can do.


Also, I was searching and kept reading about the Wade Lanthum simplification. Does anyone have a link to this? All the links I found were password or some ****.

Mahjik

iTrader: (1)

The two solenoids bolted to the UIM are disconnected? Are you non-seq?

What are you using for boost/wastegate control?

Cory Simpson

They were connected, but when I removed the UIM I didn't see the vacume lines, and the nipples broke off... Easy fix.


Also, I'm going to try and do this:

http://www.newwave.net/~flanham/wlan...urbosystem.jpg


I didn't know Wade was a member

Mahjik

iTrader: (1)

Are they hooked up now or not?

Cory Simpson

The intake is still off, but they will be rehooked. Seeing as how I believe they are needed.