So my car sat for 2 years for various reasons. I have a s4 t2 with a Walbro 255lph pump. Before I knew I was going to store it, I put stabil fuel stabilizer in the gas tank, I also have premix in there. During this off time my battery also completely died.

I recently finished doing my aem fuel pressure regulator with gauge. Just to test for leaks, I used my brothers camry with jumper cables straight to my battery terminals and primed. I noticed I was only hitting 25psi!! I was wondering if any of you guys have had issues with car that was stored for a long time.

Here is what I am thinking and would like some input

a)my fuel pump took a dump after sitting for so long.

b)I need a new battery, the jumper cables aren't giving me enough power for my pump to fully pressurize

c)I need to turn up the adjuster on my FPR

I really hope its a combination of b and c, but I'm ready for choice a.

 

You'd have to offer me some powerful drugs to run a car with 2 year old gas in it.

Skip that..just offer me..

 

Yeah, but I'm doing it to just find leaks and to check fuel pressure. There is a car at the shop I work at that has been there for 4 years with old fuel and it still runs and parks fine with no misfires. But I don't recommend using old fuel of course

 

If your planning on driving the car no matter what, why not buy a battery and put it in for a more accurate reading? Also, your fuel filter could be plugged with crud and that will give you low psi ratings also. BTW, fuel stabilizer is usually only good for about 3 months

 

Thanks for the info on the fuel stabilizer.

My thoughts exactly on the battery. I do have a fuel filter also. I'll do that and go from there. I really hope my fuel pump is still good. It hasn't been used for many miles, and I have so many other things I need for my car the list is killing me!

 

If you wanna save a couple buck take a battery out've another car for testing

 

1. replace battery
2. change both fuel filters.
3. recheck fuel pressure

if still low, then you're looking at a problem with the gauge, FPR, or pump

 

I forgot to mention that I originally had a motorcycle batt and I had crimped on connectors that use a 6mm bolt to hold down the battery terminals. Doh!

 

Thanks for the help, everyone else too.

Maybe I'll do some research on old gasoline when I have time after work.
My next plan was to get a battery and change my fuel filter. I didn't think about the one at the tank, but now I'm debating on doing that, and draining my gas tank as well and throwing in fresh fluid.

BTW, anyone ever heard about flushing out a gas tank? What would they use besides fuel, anything cheaper or just better cleaning?

 

Only way yo properlh clean a gas tank is to remove it. Unless you want to pay the big bucks for 16 gallons of kerosene or diesel and let it sit for a day than drain it. Even then it won't clean the tank very well

 

So I got a new battery and primed it. 24 psi

My fuel pump does not prime all lol the time I go to ignition on. Is it supposed to? Some bmws I work on, do not, but they have a fuel pressure sensor.

I also noticed my fpr screw was completely backed off. I tried screwing it in so there is resistance, but note my fuel pump won't prime, even when cranking! Fml

 

So the aem fpr said it was set at 40psi from aem factory, but I checked the spring tension and it was backed out all the way. I'm so stupid for not double checking.

Anyways, now I'm dealing with a problem that my fuel pump does not always prime, unless I wait a while. I know the bmws do that, but they have a fuel pressure sensor. Rx7 do that also? I'm going to have to check the electrical

 

It only turns on on Start..or if the AFM sees movement(from air or your finger!).
It will not turn on in the ON position.

 

I actually have a megasquirt ecu.

It doesn't prime unless the fuel pressure drops down to almost 0. Is that normal? I always thought it was supposed to prime everytime I go to ignition on