14b on my 2G - It runs, but nevertheless, there are problems...

[99gst_racer]

OK, Some of you already know, I just finished a 14B swap on my 99 GST. I also installed a SBR FMIC and piping at the same time. I got everything together last night and fired it up for the first time. So far so good. I took it for a drive and was not 100% impressed. My MBC is set at 14 psi, and the 14b did not seem to spool until 4500 rpm... I know that is not normal. From idle to 4300ish, I could only seem to build about 6 psi. Then when 4500 hits, my boost goes up to about 20 psi. I have experience with boost creep, but in this situation, there is more to it.

* If my turbo is not getting enough oil, cold it cause the turbo to spool really slow??

* How can I test to see if it getting enough oil?

I did not yet check for boost leaks, but I will tonight. I am, however, 98% sure I dont have any. I could hear or feal anything along any of the piping route. Another thing; After driving it for about 15 min, I could barely build enough boost to open the BOV. The turbo and O2 housing are ported. I had my MBC set at 14 on my T25, and I didnt change anything between the swap. When it jumps to 20 psi, my car has many small hesitations. It almost feel like 30 tiny little fuel cuts..... maybe my injectors maxing out... My car is also running a little less rich with this set-up.

* Does anyone know what could be wrong, or what I need to check?

I will hook someone up with something cool if they help me.... , I'm just desperate.

Please feel free to offer suggestions and ask me questions.... thanks in advance.

 

[fwdturbobov1996]

you may be knocking like a mofo if it doesnt feel fast had the same problem with his gs-t when he went from a t-25 to evo 3 . He couldnt boost more than 15 psi . Problem was his turbo xs boost controller . He got a greddy e - 101 or somethign like that . Now he can boost 20 psi just fine . But one time we unhooked the b/c and hit 29 psi ! .. not good . car still runs like a champ tho . try a electronic boost controller.

 

[nine5raptor]

Sorry, but changing turbos does not necessitate a boost controller change.

The slow spool does seem indicative of a boost leak or a poor tune. I would go back over every wire and hose connection and make sure you got everything hooked back up right and tight. Also pressurize the system to check for leaks.

You also need to find a friend to log the car and see what is going on with timing, airflow, 02s etc.

The shoot in boost to 20 is creep, and I am surprised you did not immediately hit fuel cut when that happened. That seems like airflow is low, though boost is high.

 

[fertez_turbo]

The shoot in boost to 20 is creep, and I am surprised you did not immediately hit fuel cut when that happened. That seems like airflow is low, though boost is high.

He's got a TMO Stage 3 ECU upgrade which eliminates boost and fuel cut. I was in the car last night and we cant figure out the problem for the life of us.

 

[99gst_racer]

Anyone in the area with a logger that we can use for a couple pulls?? I've been saving for DSMLink, so that's why I dont allready have a logger......

 

[fertez_turbo]

Anyone in the area with a logger that we can use for a couple pulls?? I've been saving for DSMLink, so that's why I dont allready have a logger......

There were a lot of 2G guys in that kalamazoo thread....maybe one of them have one man?? It's worth a shot.

 

[99gst_racer]

The slow spool does seem indicative of a boost leak or a poor tune.

If there is no boost leak, and it is poor tune, please explain what kind of poor tune causes extremely slow spool.... Bare with me, I'm kinda new at some of this stuff....

I would go back over every wire and hose connection and make sure you got everything hooked back up right and tight. Also pressurize the system to check for leaks.

We did double check every connection twice after the drive. Trust me, it's all in place. I will pressureize the system though, just to be 100% sure....

The shoot in boost to 20 is creep, and I am surprised you did not immediately hit fuel cut when that happened. That seems like airflow is low, though boost is high.

I dont experience boost cut because of my TMO stage 3 chip.... Please explain how aitflow is low and boost is high..... Thanks.

 

[99gst_racer]

slow spool does seem indicative of a boost leak or a poor tune. Also pressurize the system to check for leaks. That seems like airflow is low, though boost is high.

Damn dude, you'll never believe this. I just found my leak. One of my injectors is not properly seated and at 10lbs, air is just rushing out of there... Now I understand what you meant by airflow being low... I'm going to go give it a good fixin right now, and I'll post my results in a couple of hours... Thanks...

 

[99gst_racer]

Damn dude, you'll never believe this. I just found my leak. One of my injectors is not properly seated and at 10lbs, air is just rushing out of there... Now I understand what you meant by airflow being low... I'm going to go give it a good fixin right now, and I'll post my results in a couple of hours... Thanks...

OK, still no fix, but it does start and idle better now....


Here goes. I pulled the vacuum line off of the WG actunator and the car still runs the same. It does nothing different than when it's connected. What does this mean??

 

[haut]

Anyone in the area with a logger that we can use for a couple pulls?? I've been saving for DSMLink, so that's why I dont allready have a logger......

I'm in St. Joseph

I can help you out. Check your PM's

 

[92awddsm]

If there is no boost leak, and it is poor tune, please explain what kind of poor tune causes extremely slow spool.... Bare with me, I'm kinda new at some of this stuff....

If you are tuned really rich, it will cause slow spool and stutter and/or hesitation throughout the rpm range.

 

[blackGSX2g]

There were a lot of 2G guys in that kalamazoo thread....maybe one of them have one man?? It's worth a shot.

Yea, I've got a logger and a palm if ya need it. Let me know if ya need a hand.

 

[ZenkaiRacerDsM]

Sounds like a bad wastegate actuator. Or bad cracks in the turbine housing around the flapper.

 

[saw wave analog]

sounds like the turbo itself is ####ed somehow.. the wastegate not doing anything seems to indicate.. well.. a problem with your wastegate. is the actuator arm easily moved? bent maybe?

 

[R3dR]

it would appear that after reading the entire thread my money says that there is a crack in the turbo housing that goes between the waste gate hole and main port.
I had the same issue, the turbo spooled slow and would not go very high at all.
If you get a new housing make sure you get one that is ported and has the new 34mm flapper in it.

 

[AWDTireSmokeTsi]

It sounds like your wastegate acuator seems to be at fault, which isnt suprising with a 14b, espcially an older one with more miles. Also check around the wastegate flapper for cracks.

 

[99gst_racer]

Thanks for the replys guys. I really hope there are not cracks on it. I really really dont feel like pulling it all back off again.... I've got an extra WG actunator laying in the garage. I'll slap that on there tomorrow and see what it does. I'll post results...

Thanks again, -Paul-

 

[99gst_racer]

I cant believe how I missed this.... Well, I fixed it last night.... You'll never believe this... The WG actuator arm came disconnected from the flapper, so I was running on an open WG. We stuck it back on there and everthing is just peachy, except for some rough boost creep....... There is no way it stay on there because there is no hole for a pin to go through. We're going to drill a hole tomorrow and stick a pin through there and call it a day. Thanks for you help guys.

Thanks -Paul-

 

[olmytsi]

congrats and have fun with ur new found power. My turbo also doesnt have the hole for the pin but it stays on somehow. now tune dat bad boy and go run some high 13s. u should get a dump or port the o2 housing to eliminate or reduce boost creep.