better to hold off on AFPR ?

[1Gina2G]

I'm in the process of changing out my old factory lines to nice braided hoses, changing the fuel filter too. I have a universal adjustable regulator I could install but I haven't done so yet. This is a new rebuild that's not put together yet, I'm just asking about what I should do before the first time I try to start up.

Should I just leave the factory regulator since it's preset? Or is it safe to start off with an AFPR and adjust accordingnly? I'm just unsure how my AFPR came out of the box, I don't want it to be too lean. I'm going to do the fuel pump rewire soon, just confused on why you need a fuseholder and relays, I thought you just ran a new wire to the alternator.

 

[snowborder714]

Are you sure your universal AFPR raises fuel pressure on a 1:1 ratio with boost? And are you sure you can both raise/lower pressure with it?

If so, you can activate the fuel pump without turning on the car with the black fuel pump test connector on the firewall (usually bundled near a blue and tan plug that just hang). This way you can set fuel pressure before actually firing up the car.

 

[1Gina2G]

Are you sure your universal AFPR raises fuel pressure on a 1:1 ratio with boost? And are you sure you can both raise/lower pressure with it?

If so, you can activate the fuel pump without turning on the car with the black fuel pump test connector on the firewall (usually bundled near a blue and tan plug that just hang). This way you can set fuel pressure before actually firing up the car.

I haven't done anything with the AFPR. Can you tell me more about this fuel pump tester plug? It's an open / unused wire next to the pump? The battery would have to be connected right?

So what do you use to test pressure with everything how it is?

 

[snowborder714]

The fuel pump test connector is a single black "unused" plug on the firewall behind the throttle body area. Yes, the battery has to be plugged in. Just provide power to that connector and the fuel pump should turn on.

You will need a fuel pressure gauge mounted on your AFPR to view the pressure to be able to adjust it properly.

 

[WES_393]

Are you going to install an bigger fuel pump? If not there's not much need for an AFPR.

 

[1Gina2G]

Are you going to install an bigger fuel pump? If not there's not much need for an AFPR.

No but I will be rewiring the stock fuel pump, and I have a fuel lab fuel filter if that means anything. stock rail & injectors, but I thought the AFPR was a nice tool to use to be sure you're not to rich / lean? And also how you would adjust the flow, since I'm not sure how else you could adjust it?

I was planning on getting a wideband too, I just want to be sure my fuels burning how it's supposed to on this new engine, I don't want to detonate and I don't want engine knock

I actually wanted to do the fuel pump rewire since it's a fix really, pumps not even working how it was rated for, but I just learned running lean is worse than running rich, but you don't want either.

 

[WES_393]

Well it wouldn't hurt to have one, they are very handy. It would save you from buying one in the future.

 

[1Gina2G]

Well it wouldn't hurt to have one, they are very handy. It would save you from buying one in the future.

For just informational puruposes, would a wideband bring more information compared to an AFPR?

I know the guage for the afpr doesn't go in the car so widebands good for driving, but how do they compare in accuracy per dollar?

I think I may be able to get an AFPR cheaper than a wideband, then also have control if needed later.

 

[Turbotsiawd]

Yeah a wide band would be a wise decision. Along with a good boost gauge.
Glow shift has a good bundle you get three gauges pillar and such starting at 159!!!

http://www.glowshiftdirect.com/Triple-Pillar-Pod-Custom-Gauge-Package.aspx

 

[1Gina2G]

Yeah a wide band would be a wise decision. Along with a good boost gauge.
Glow shift has a good bundle you get three gauges pillar and such starting at 159!!!

Triple Pillar Pod Custom Gauge Package

That just looks like JUST the guages and 3 peice holder whitch actually came with my car.

Trying to figure out the most accurate way to monitor fuel pressure.

 

[jpmxrider489]

If you have gauges, I would get a wideband. It will help in the future. There's no need for a afpr. Your not going to over run the stock regulator. A Wally 190 won't over run it. But if your that serious about you fuel pressure then it won't hurt. You'll need a adapter fitting which I have if you need it.

 

[1Gina2G]

I didn't mean to say I had guages already because I don't, just the actual 3 peice holder is what I was talking about.

Would a wideband cost more for me, since I would pay my friend $40 to weld in the 02 bung to my downpipe? (I can't weld)

I understand a widebands probably in the $150-$200 range while a fuel lab AFPR could run around $100-$160

are widebands more accurate than AFPRs? does anybody know?

 

[KevinRR]

are widebands more accurate than AFPRs? does anybody know?

A wideband and a AFPR is two different thing. The wideband is used to monitor air/fuel ratio. An AFPR is a adjustable fuel pressure regulator, it used to adjust your fuel pressure. If you install a high pressure fuel pump like the walbro 255hp.