Its definetly something mechanical.... We tried at least 30 maps to get it to budge and nothing..... tried every possible injector size.. tried leaning out the entire map.. tried a fresh map... everything possible we could do tuning wise we did.


Intially he had an aftermarket intake manifold and the whole 9 yards... I had him put everything back to stock possible to find the problem. The only thing left is a fpr that im trying to track down for him to borrow.

If anyone lives in rhode island and doesnt mind helping shoot one of us a PM.

Cheers!

 

I'll see if I can free up some time this week and swing by to lend a hand.

 

That'd be cool just dont want to be wasting anyones time. If you let me know i got beers here and w/e else. The only thing i havent changed back to stock are the injectors, fpr, fuel rail, cams.

 

look at your open loop load tables and see if they were messed with. you did say you werent getting any fuel trims. the load might be set to low for it to be in closed loop fuel control. i highly doubt it but just throwing it out there.

it should start with 86.9 @500 rpm and the same for 1000rpm.

 

I checked his open loop tables in the rom he sent and everything was stock. The car is mechanically getting too much fuel I think. I would lower the FPR fuel pressure until you see the AFR's lean out and see where you end up for a fuel pressure reading.

 

Ok ill go try that now and see if it works or my car just dies should be either one right?

 

SO i just went in the garage dropped my fuel pressure from 38 psi to lowest itll go at about 29-30 psi and i did get the afr's to go to 11-12 with 880cc injector scaling for 680cc injectors.

So i decided wtf lets try 1000cc injectors scaling and latencies and i got it to a 12.-13 right in there.

I guess this mean my problem lies in the FPR. I just dont see why it would be a problem if the fuel pressure is right why would this fpr be any different from stock.

 

It shouldn't be. Fuel pressure is fuel pressure. You didn't by any chance rewire the fuel pump power wiring directly to the battery did you?

 

Ok heres the problem. Its not the fpr but that fact that i f*cked up the return and feed some where down this long road of doing things over and over again. lol.

Anyway. Road Spike happened to luckily post a link to ams's for install directions which also uses the same aeromotive fpr. Anyway its shows the feed going to the bottom of the fpr and then from one of the two side ports is the feed line to the rail. and the drivers side outlet on the rail goes is the return line back to the car.

The only problem is now hooked up like this I have no fuel pressure ? My pump is priming and i fuel all the way to the fpr. but then i checked the outlet port and i have no fuel coming out what so ever ?

What would be the problem ?

I tried the adjustment screw all the way in and out no difference.

I made sure also i have my 622 in for scaling with my 680's and the latency's along with my afr map and etc all in order.

Any ideas?

Thanks again guys everyones been a lot of help and i very much appreciate it. Im trying to get it running so i can get it back on the road finally.

 

Ah ran across this thread hmm

I would do two things here if your heart is set on saving the FPR. One call a shop and ask them questions about the install like AMS. Or two have Jack look at the install since he's willing to goto you and have a look at the car.

 

Im going to call AMS today and see what they have to say. I wrote to Aeromotive last night about the situation so we'll see if they get back to me.

Other wise if for what ever reason the fpr is junk i just need to find a stock fpr and a adapter for a hks fuel rail.

 

Well, just aboput every adjustable FPR you will find will have the return line on the opposite side as the adjuster screw so that will always help you figure out which is the feed and which is the return. I only work til noon on fridays so maybe I can swing by after work then?

 

If you have a stock fuel rail I'd use that instead of trying to find parts honestly.

 

Evo8Emperor, how are you measuring your fuel pressure? I think I remember a few posts where you said that the fuel pressure was OK. But, now it sounds like maybe your FPR was hooked up wrong or malfunctioning or something with the return line. I would have imagined that would affect your fuel pressure and with your super rich AFRs at idle, it almost sounds like your pressure at idle was way too high.

So, I was just curious as to how you were measuring that? I'm assuming you have a fuel pressure gauge hooked up to one of the ports on the FPR?

 

Yah I have a Stewart Warner fuel pressure gauge to measure my fuel press.

As for hooking up the fpr the right way i do. I called AMS today just to make sure I had the lines right and i did. The feed goes the the drivers side port on the rail then it goes from the passenger side port to the FPR and from there the bottom port is the return back to the car.

I asked them what they thought might be the problem and seeing i have no boost leaks, my car is tuned and no codes being thrown. They suggested that it must be a faulty FPR.

Jack thats fine with me. Ill make sure im out of work for when ever. But the only problem is will be make any progress if i know my fpr is the problem and i dont have anything to fix the problem yet.

As in a stock fpr or a new aeromotive one that isnt defective.