I have the vortech complete kit setup and decided to install a walboro pump.

So I installed it and put back the suel pump assembly, turned on the car and it is fine... runs way rich but it ran.

So then

I decided to take out the inline fuel pump setup vortech runs.
I took out anything RED in the picture below. Now the car wont start!!!!!!!!! PLease help. Did I do it wrong?

 

ya, thats not gonna work. you need to research how that FMU works then change the direction of your blue arrows. your pumping your fuel into a dead end at the moment.

 

the fuel pump needs to pump into the FMU, the FMU is a fuel pressure regulator that will let the right amount of fuel go to the injectors, i would leave it how Vortech says to install it.

good luck

 

let me explain better.

your stock pump is pumping to the secondary pump. lets call that your primary fuel line. your primary fuel line is being regulated to stock fuel pressure by the stock regulator which is T'd off just before the fuel leaves the fuel pump housing.

Now, your have your secondary pump pumping to your engine, i will call that the secondary fuel line. The FMU is whats acting as the regulator on your secondary fuel line. the secondary pump would cause insane pressure at the rails if it was unregulated, so the FMU is the regulator on this line, and its dumping back to the lower pressure primary line.

Your trying to send your fuel into the outlet of the FMU... its not gonna work like that! You must keep your secondary pump if you keep the FMU. If you want to get rid of both the secondary and the FMU, you will need a complete re-tune and larger injectors that can provide the fuel you need without the super high pressure that the FMU creates.

 

well
ok
Im not sure about the flow of the fuel at all I just drew it to show what I took out.

so now I dbl checkd everything.

and tried getting the FMU completely out to get it running.
BUT the fuel line quick connects WONT COME THE **** OUT!!!!!!! so we decided instead of destroying those fittings and not be able to go back incase it didnt work to just put the inline fuel pump back in since the car did turn on with them in.

the inline dosnt even turn on till boost, I
dont understand why it wouldnt start witout it.

I have no clue WHY **** WONT WORK im just SO OOOO OOO PIST.

Im going to miss my appointment at AAM tom, for my FINAL tune.
car wont run
im ****ed
cant go to work >< need get renta car
WTF. venting
so my option right now is:
put the inline back in the way vortech has it


SO WHY THE **** AAM AND OTHER EXPERST WOULD TELL ME TO TAKE IT O:UT!!!!!!!!!!!!!!!

 

They prob told you (or thought they told you) to remove the entire vortech fuel assembly and do the "phunk" method (gave me the advice I needed for my install) on your stock fuel pump assembly. You have to drill a hole in the yellow surge valve and you have to make the hole on the stock fuel pressure regulator larger. If you search for a post by myself you will find the exact sizes necessary.

 

because the path thru the inline is the only functional route the fuel can take to the engine. when you took it out, you broke its path. you are thinking that the fuel flows thru the FMU, but it does not, the FMU is just a regulator and you definatly cant flow fuel thru it backwords. Your sending your fuel to its output, where it used to vent the secondary pumps pressure back to the lower pressure hose.

 

I totally understand now... did research on how FMU's work and yes phunk Thx allot you make total sence now.
sisith yes I did the enlargements and everything in the fuel pump assembly so im good there
I decide to quit areound 2am last night.
called AAM to confirm
they meant the whole vortech setup. so basically put my fuel line to stock. taking out the FMU
witch I tryed yesterday but failed since I couldnt open the quick connect on the vortech fittings, they told me I have to buy a tool at pep boys or something witch im going to do now.
what also sucks is since its monday and i dont have my own garage, Ill be working in the rain! yay !

Ill keep you guys up to date, AAM told me depending on weather today they can still fit me in the scheduel if I live my house before 12am so I can get there around 3pm. so i got 3 hourse wish me luck

but worse come to worse I can bypass that FMU thing like the inline fuel bump was still in it and make it run. correct?

 

im such a noob.... bought a fuel quick connect tool, and ofcourse it dosnt fit / work

so I took the FMU out and connected the line to each other, basically taking it back to stock.

missed my AAM apointment and its re schedueled for thursday or friday depending on the stupid weather we are having!

i just want this car done for ECZA!

thanks allot for the help guys, i knew I could count on you.

OBTW jacking ur car up and geting under it in the RAIN + 40mph WIND = the SUX!

 

Glad you got her figured out . Just think of all the mistakes we make as learning tools . You know much more after its fixed and over with . It helps not to pull your hair out and throw wrenches . HaHa !

 

What Booger said...you appreciate what goes into your car more when you work on it yourself and you learn how it all functions. You will now know how to service it in the future so you dont need to drive to AAM everytime.

 

That was sweet... Good info phunk and thanx for sharing...

 

Let us know how the tune goes at AAM. Glad you were able to figure things out.

 

yea thx guys... I fix everything in the car myself. just want a pro to tune it hence why I take it to mike at AAM. I think the tune will be friday since thursday is goign to rain. Mike takes the car on the street and tests/tunes it for the street after he tunes it on the dyno.