I just installed an ati kit (complete) on my 1998 Camaro Z28 and the thing dosent work. I have the fuel pump and FMU with a 5 psi pulley and it only makes 2 pounds of boost and the fuel pressure dosent rise at all. I tried all kinds of things with the FMU vaccum connection. The manual is crap and it dosent explain were it really needs to go. The bypass valve is in the right direction. Im also not leaking air. Shouldnt the fuel pressure go up on a curve with the boost? Everything is installed correctly except for the vaccum line maybe.
Could somebody take some pictures of there entire vaccum setup and email them to me? <img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" />
Camarogod98@hotmail.com

 

Are you sure you're getting the correct fuel? I would check that. What does your fuel guage read?

I got hammered for saying this once before. But, I'll stick my neck out again... once when I had my aux pump incorrectly wired and it wasn't coming on, I'd build 2 PSI of boost and get no further. But, my fuel was too low, too.

Temporarily hot-wire the fuel pump to run all the time (to make sure it's on... you should hear it) and try it again. Also, make sure it's pushing fue in the right direction. If your problem is solved, trouble-shoot your fuel wiring/plumbing and fix it. If not, come back and we'll kick around some more ideas.

Use some of the links on my site to help you out:

http://blackls1ta.com/tech_files.htm

<small>[ October 07, 2002, 02:17 PM: Message edited by: Black LS1 T/A ]</small>

 

many have also done this...

are you flooring it? read too many posts where people were barely giving it any throttle and wondering why they didn't get any boost.

no flame, or attack on intelligence, just asking because I have seen it before.

 

When I first installed my ProCharger on my 1996 Cobra, I wouldn't build but 4#'s on a 10# kit. I found that the crappy clamps they sent in the kit were leaking everywhere. I swapped them ALL out for T-Clamps and done. All the boost was there. I also had the FMU on for about 3 months and never could get a rise on the gauge. i spent a week on the Dyno at a shot in town and found their FMU's to be crap. We took it off and I did better tan with it. Then after some programming, it was just right. Good luck.

 

I know my fuel pump is on and the flow is in the correct direction. And Im also flooring the car and it only makes 2 pounds of boost. I inspected the FMU inside and it looks like it should. I dont have any leaks on my hoses or anything.

I called Tech up at ATI and told them my problem. The guy told me that i wasnt getting 5 pounds of boost because of my borla exhaust (witch has no plate in it. HEHE!). he said the exhaust was breathing to good to make it produce alot of boost. Then the guy tried to sell me a smaller pulley for 90 bucks to make 5 psi of boost when my kit should already do that,WTF.

wouldnt the fuel pressure rise if it has 2 pounds of boost?. All my fuel and vaccuam connections are correct. I have checked everything. Im going to try putting the block off plate in my borla and see if it works.

If i cant get that to work im going to take my FMU and Fuel pump of and hit them with a golf club! LOL

My next step after i junk the fmu setup is getting a stand alone boost refreance injector controler and I will be adding 3 injectors before the throttle body.

I know you guys are going to ask me why i would want to do this instead of just getting my ECM tuned. I have my reasons and you will all have just see in a couple of months why im going to do it like that!

Ive invented something for our cars thats going to be BIG for the daily driver blower cars! Im sure the mustang crowd will want them to. Im a machinist and doing custom work is no problem for me. I have access to 6 million dollars worth of CNC equitment!

I still would like to get the FMU setup working because it would be cheaper than a controller and 3 injectors.

Jay H.

1998 procharger Z28 (has the flu right now.lol)

 

Well... freeing up the exhaust WILL lower boost.

The 4.5 to 5 PSI of boost the advertise is based on a stock setup.

Only Golden West Performance with their Stage II kit seems to know how to get you exactly what boost you want with the power levels you want.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">than a controller and 3 injectors.
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Not to mention the LS1 intake doesn't flow well wet, etc.. etc.. This method has been played out for decades.

Get some 50lb injectors, LS1Edit, an awesome fuel pump and be done with.