How do I add fuel?

[87gmc]

So where on flashscan can you adjust the fuel pump pressure?

[XLR8NSS]

So where on flashscan can you adjust the fuel pump pressure?

I don't have my Flashscan setup yet but, I don't think that is even possible through the PCM.

The Injector Flow rate is increased as MAP increases not the fuel pressure.

On the trucks the fuel pressure is increased mechanically with the manifold referenced fuel pressure regulator as the MAP increases. Since the fuel pressure is increased with MAP the IFR stays the same at all MAP values.

Just two different ways to get the same end result.

[Blk02Ls1A4]

if the engine needs more fuel and the ltft's are adding fuel, then how does decreacing injector flow rates help?

[87gmc]

I was also thinking someone said my transmission depends on my maf. Is it possible that the maf is dirty from oil off the k&n? Transmission is taking it sweet time shifting from 1-2 on WOT its also losing timing in this area.

[XLR8NSS]

if the engine needs more fuel and the ltft's are adding fuel, then how does decreacing injector flow rates help?

The Injector Flow Rate tells the computer how big the injector is. If you decrease the IFR the computer thinks the injectors are smaller and will keep the injector on longer. Now you have the same size injector still but, the computer is keeping it on longer which means more fuel is being delivered.

[Drake]

So where on flashscan can you adjust the fuel pump pressure?

Interesting... do trucks and other non F-body and Y-body vehicles use something other than demand type fuel systems?

[XLR8NSS]

So where on flashscan can you adjust the fuel pump pressure?

Interesting... do trucks and other non F-body and Y-body vehicles use something other than demand type fuel systems?

It might be a possiblity. I was just looking around in a LS1Edit(gasp) file and saw this table. I don't know if it's actually active on my truck or Fbody but, the numbers are all 1 so it wouldn't do anything anyway if it was. Someone adjust it and see if anything happens. The scale is from 4.5 volts to 18 but, the lower end is cutoff in the picture.

[Drake]

Weird... I've never heard of or seen a fuel pressure sensor returning information to anything. Not sure how that would work.

Ls1ed...what? :wink:

[XLR8NSS]

Yeah, I assume it's for some other platform. Like you say I've never seen any pressure sensor.

As much as we might not like to mention it sometimes Edit was one of the first on the block. We all probably have old Edit cables in our closet. :P

[GMPX]

It might be a possiblity. I was just looking around in a LS1Edit(gasp) file and saw this table.

One more outburst like that and you'll get banned :wink: :wink:

Table does nothing more than adjust Injector pulse width based on battery voltage, it compensates for the fact the pump would be running slower and injector opening times for a lower/higher voltage.

Cheers,
Ross