i have been installing my charger recently and some problems came up....
the charger is basically installed on the car already... but the car is really really slow... even slower than stock....
here are the problems i have to fix so far... i just want to know if they are the reasons causing my car to run so slow...

1. there is something wrong with my oil return hose and i will have to take it out and reinstall it...
2. i didnt use the fmu that came with the charger and used a fuel pressure regulator instead...
3. i didnt install the fuel pump that came with the charger yet...
4. i found out that i didnt adjust the tensioner tight enough causing the belt to shift over a bit...
any advice would be appreciated...i am kinda lost...
thanks

 

i think you need to install the inline fuel pump at least or do you have a walbro?

 

Can you be more specific?...leaks? broken?

that is an important part...it hold the pressure hi when boost is reached.

Only necessary if you are not running Walbro hi-pressure in-tank pump

that is something that will take time to get adjusted right...just do it in intervals and make certain you loosen the center nut on tensioner pulley prior to and after adjusting the brass tensioner.


More information is needed to help with all these ???

 

1.is it leaking?
2.you need to use FMU to build up your fuel pressure. you are running lean now
3.you have to tap the aux fuel pump into your fuel line. I hit an 18:1 AFR when the aux pump was off. you are running lean now
4.can be your belt aligment if it jumped a rib.

your car doesnt feel fast because you are running lean now. Did you install any
monitoring devices?

 

Hey a33,

Who installed your S-AFC for you?

 

1) Depending on the problem, you may destroy your Vortech
2-3) Lean conditions will destroy your engine (once you get below fixed)
4) It's a PITA to replace the belt if you shred it.

Do the install right... You are playing with fire.

 

i installed it a year ago...
my friend did it for me...

 

i am installing the airfuel ratio.... and i also have an safc... there is an afl% reading on the safc.. what does that stand for???

 

forget about the SAFC and I am not familair with it. But it has nothing to do with your situation at this moment.

what kinda A/F gauge you have? EGT will be a bit better than a low-end A/F gauge.

installed the pump and FMU? feel any differences?

 

what is an egt?? i have the autometer airfuel ratio...
and i havent installed it yet... working on it now... havent installed the fmu that came with the charger yet and havent done the fuel pump yet... i am doing it right now... but i have driven the car since last week

 

EGT = exhast gas temperature. a handy device to monitor your A/F ratio. set the limit at 800 celcius and dont let your car stays over 800 for a long period of time.

if your car is running lean, you EGT will raise really really fast and it's more noticible when the car is under load.


fuel pressure gauge will be handy too.
my selection of gauges:
1.fuel pressure
2.EGT (a must, IMO)
3.boost

 

i have an airfuel, exhaust temp, and boost...
should i get the furl pressure too???

 

I highly recommad a electronic fuel gauge.

a boost gauge with that, at least you know you have both air and fuel. running rich is better than running lean.

 

do u know where i can find wirng for the air fuel gauge???
my friend said he cant find the o2 wire on my car....

 

did you check the Hobbs switch? that was the main factor for my SC install when it was unresponsive...

remove the vacuum line to it and have the aux fuel pump on at all times.

--cheston

 

what is the hobb switch??

 

it is a switch that comes with the fuel pump. Loren00miata modified this hobb switch to have the pump turned on all the time instead of pump-on only during boosting. the stillen kit uses a vacuum hose to detect the boost. when the boost is detected, it turn on the aux fuel pump, which was reported causing a lag when people floor the pedal.

 

how do u modify the hobb switch???

 

cheston just gave you some clues....I have the link saved on my computer and I will post it later.




http://forums.maxima.org/showthread....t=supercharger


here you go...but I suggest you working on one thing at a time. so if there's a problem, it is easier to track down.

 

Your crazy for driving your car around with the an incomplete supercharger install. Hopefully you aren't doing permanent damage. My suggestion is to finish the install with ALL the parts Stillen provides and more than likely your problems will go away. Besides, it doesn't take that long to do the install. Potatohed and I did his complete supercharger install in 4 days. Best of luck to you.

The Wizard

 

i connected the air fuel gauge already and the car is fuel is fine....
and the boost gauge also shows that there is boost....
but the car is still very slow... slower than stock....
anyone know why????
and will the belt being not tight enough affect the speed????
there is boost and the air fuel is fine... but the car is slower than stock....

 

so you installed the fuel pump and FMU?

is that thing buzzing loud when you turn on the car? do you feel it vibrating?

 

what do u mean by the buzzing sound??? the fuel pump when u start the car????
i had the fuel pump on, but then when i had it on... the car couldnt go past 4-5000 rpm... like there wasnt enough fuel.. so i took off the fuel pump and used an adjustable fuel pressure regulator and it work fine... the car wasnt running lean like when i had the fuel pump on... so i guess there was something wrong witht he fuel pump...

 

I think he is asking if the aux Fuel pump is on all the time (i.e...buzzing) or is it only coming on when the engine "supposedly" requires it thru the Hobbs switch?

 

i had it on before, but then took it out cuz i think it is not working properly.... didint get enough fuel to the engine... but when i took it out and adjust the fuel pressure with just the stock pump, the car was fine...

but now my problem is that i seem to have everything working properly... and there is boost showing on my boost gauge... but the car is yet slower than stock... my friends said that it might be because my engine light is on and the computer automatically retarded the timing... would that make any sense???

 

Your questions are scaring me. You need expert help. Is there anybody near you with a supercharged Maxima that could help you out?

Do you know what fuel pressure you're getting during boost? What EGT?

Are you saying you're running only the stock fuel pump, with the aux fuel pump disconnected?

 

i disconnected the aux fuel pump and the problem was gone.... the guy i bought the charger from also didnt have the aux fuel pump on and his car was fine.... i dont know how much fuel pressure there is during boost, but at idle it is around 60-70

 

hmmm...when my aux pump was disconnected....the car was not fast at all.

fuel pressure at idle should be 34 - 42. FP at WOT is depended on your idle FP, the size of FMU disc and your peak boost.

say 8:1 FMU, peak boost at 10psi, idle FP is 34psi

8*10 + 34/2 = 97psi

 

would 6:1 fmu be fine???
cuz i saw one on ebay

 

No other supercharged maximas.. oh wait. There's me

BTW : 6:1 is fine! Maybe a LITTLE lean but that's why you have an AFC

And that's why I TRIED to run mine

 

jer if i still dont get it figured out anytime soon...
tell me where your shop is and i should go let them take a look...

 

they're at midland/lawrence.. I'm curious what's going on here.. since I'm jobless lemme know when you're free this weekend and maybe we can take a peek.

did you go to motronix? they made the kit for Daniel.. I know it varies a little from the basic stillen one..

lemme know

 

that is really close to me...
i am at midland and finch everyday
and that is where my car is...
i can go anytime

 

Fair enough : I'll try to stand by my promise in my email to you, and I'll try my best to book some time for you for Monday... free up a hoist at his shop and his time.. maybe we can figure out what's amiss.. hmm maybe I should make a career change and start helping fix supercharged maximas.. hey I need a new job after all lol....

When are you free during the day? Also, did you check with Motronix at all? I'm pretty sure they did a few alterations of their own to Daniel's setup vs. the regular stillen setup. It would be nice if we knew what we were up against - I think I remember Daniel telling me the S/C kit originally came out of his friend's older-gen I30... that's why they had to make alterations to it..

 

Hi Jer

Is this Daniel Chen that you are talking about? Does he have a 5th gen SC'ed max? So you are saying that he got a 4th gen kit and custom fitted onto 5th gen?

 

yup