So, I tried to get my car tuned on saturday and was very unsuccessful The dyno showed that I was running way lean, which is strange because my AFR gauge showed 10-10.5 at WOT. Their dyno was reporting around 13.6 so he started looking at the AUX fuel pump and said the Unichip wasn't turning the pump on. So, now I have to figure out WTF is going on. Plus the tuner told me the Unichip doesn't work with the rev-up??? Why would Vortech sell a EMS that doesn't work...This makes no sense to me. The other thing that really sucks is that they are the only unichip tuner in TX and are 240 miles away.

Others have said before to dump the Unichip and get the HKS V-pro, like Thomas SGP. I guess now I know why. $400 for no tune for them to mess around with the aux pump for 4hrs + gas and I would have been that much closer to the HKS.

 

Utec is another viabable option. It does not require an authorized dealer to tune either.

 

I dont think Vortech would use the Unichip if it didnt work with the revup . If your kit is for your year of car . You should be good to go . Maybe the Unichip unit it self is bad . Call Vortech .

The self install maybe your problem also . Maybe you didnt get something wired up right .

 

Yes, I figured the unichip is probably bad, but would you take your car back to a tuner that said it won't work in the 1st place??? So, I'm basically thinking I need a new EMS.

 

will the UTEC control the aux fuel pump or will I need to get an in tank?

 

I believe a walbro and ditch the aux fuel.

 

No...because if he says he is a Unichip dealer/tuner and he cant figure it out one way or the other . He really isnt a unichip dealer .I think some tuners...once they tune several EMS's , they think they can tune anything . They get hard headed . My shop has tuned the Utec on Subaru's but when it came to tuning the 350Z version . He couldnt get it and is hard headed and now says he doesnt like it . I even gave him the phone number to a guy that had the answer to the problem [ common Utec problem ] and he wouldnt make the call .

making a drive will be cheaper than a new EMS , but making the drive every time you need to ...is tough .

Good luck

 

is the HKS V-Pro overkill for a Vortech setup? I'm sorta leaning toward the Utec right now with a drop in walbro. Since I'm doing this should I upgrade the stock injectors too?

Thanks for your help and comments guys!

 

VPro will be the same situtation with only authorized dealers able to tune. Utec is much more affordable.
Upgrading the injectors may not be a bad idea, BUT that really depends on you. Most people will move up pulleys and increase the boost. So you may want to just do it right from the get go and get the injectors you will eventually need.

 

i think the HKS is overkill unless u have the money or making over 500hp. I would either go with the utec + walbro + 440cc injectors and ditch the fmu (good for 400hp). or u can go with the greddy EU and it will do the same as the utec or even find an used ss box if money is an issue.

 

i have an 06 revup, with vortech setup did it my self and runs good. with the unichip, double check your wiring to the relay for the fuel pump from the unichip.

 

wiring was quadruple checked. What kind of AFR are u seeing WOT?

 

Based on the advice of Performance Factory's Jeremy we decided to scrap the whole Unichip/aux fuel pump setup for an '06 RevUp as it was thought to be just BARELY adequate and we wanted more room for error. Not to promote our little thread, but look down this list for the 'RevUp Vortech Installtion' and see if the section on the fuel system installation might be helpful for what you want. We went with the UTEC/Walboro/Deatschwerks/CJMotorsports and got the whole shebang tuned by SGP in Houston with phenomenal results. A bit over the top and slightly more expensive then the Vortech but worth every penny, in the long run.

(Not sure why Thomas at SGP went right for the F-Con, as you related, but it definitely is overkill. The guys at SGP made very good specific recommendations for us and never tried to 'sell us a bill of goods', so I am not sure what the disconnect was there but it might be worthwhile to try 'em again).

 

+1, I have an 05 with the exact same setup. Vortech, Unichip and its a revup. I didn't do the install myself but I would say the same...Check all the wiring and connections.

My A/F at WOT is around 11.7

 

ok i scrapped the aux pump dropped in a walbro 255 and a fuel pressure gage. I removed the aux pump and connected the FMU in line from the tank to the manifold/damper. Now when i get to about 4800 RPM the engine cuts out. It looks as though I'm running around 11.5 AFR then goes WAY lean.

Here are the Cipher Logs:

AFR WB-B1 (AFR) AFR WB-B2 (AFR) CAL/LD VALUE (%) ENGINE RPM (rpm) THROTTLE POS 1 (V-Throttle) VEHICLE SPEED (mph)
11.44 11.39 100 3125 4.17 28.8
11.58 11.56 100 3213 4.17 29.4
11.73 11.56 100 3300 4.17 30
11.76 11.91 100 3350 4.17 30.7
11.44 11.7 100 3375 4.16 31.2
11.47 11.66 100 3438 4.16 31.7
11.39 11.51 100 3550 4.16 32.3
11.44 11.48 100 3600 4.16 33.1
11.31 11.6 100 3638 4.16 33.8
11.2 11.23 100 3675 4.17 34.1
11.33 11.54 100 3763 4.16 34.6
11.35 11.6 100 3863 4.16 35.1
11.7 12 100 3950 4.16 35.9
11.74 12.11 100 3988 4.16 36.6
11.7 12.12 100 4025 4.16 37.3
11.73 12.04 100 4075 4.16 37.7
11.67 12.15 100 4200 4.16 38.3
11.63 12.37 100 4313 4.16 39
11.93 12.19 100 4388 4.16 40.2
11.96 12.13 100 4450 4.16 40.9
11.7 12.11 100 4513 4.16 41.5
11.76 12.04 100 4625 4.16 42.1
12.31 12.27 100 4725 4.16 43.3
13.21 13.19 100 4863 4.16 44.3
19.46 22.36 100 4588 4.16 45.2
30 30 100 4288 4.16 44.2
30 30 100 4225 4.16 42.4
30 30 100 4488 4.16 41.4

Anybody have any ideas? I assume having the FMU in serial is the right way, but I'm not positive. The AUX fuel pump ran parallel to the FMU.

 

I just unhooked the blower and had no problems, so the problem is only under boost. Also, I checked my peak boost from earlier and I only peaked at 4psi when the engine cut out.

 

i havent tuned mine yet, but wot i get 10.5-10.9 from 2k to almost redline then it dips to 10.2. maybe you have a defective fmu. what fuel pressure are you seeing, i see about 50psi no boost, at low boost it raises to about 60 then jumps to about 85psi

 

the boost rises with your rpm's so if your engine cut off at 4800 you wont see the full 8 or 9 pounds of boost,or higher fuel pressure for that matter. Have you called vortech??

 

hope you get this worked...subscribing.

 

Yeah I understand that the boost is linear to the RPM. I was just throwing that out there to show relation to the boost I saw at the upper 4K RPM.

My PSI is at 52, I need to go check/log my fuel pressure under boost. I'm thinking the FMU is defective also.