Fuel Pump Getting Weak?

[Steve Wood]

That's in American dollars...so add 30 percent. I'd need the bigger line for the return. Jack has the quick disconnect set...but we're into even more money. I'd love to have all this stuff...but the funds just aren't there. I have several people helping me behind the scenes. If it wasn't for them, I wouldn't be able to race at all. I'm not complaining... but I have to nickel and dime everything...t here's no free lunch. There's no one else racing a TR up here every weekend...for good reason. Parts are tough to come by...and add 30 percent to everything...p lus shipping.

I find in my own experiences, that it is a lot more fun to nickle and dime it and learn what makes it all work.  I find that a lot of people that throw money at the cars and buy all the cool stuff often don't have a clue how they work and they never have as much fun

[nocooler]

Brad i understand the budget part for sure. I'd use the factory feed as a return and a -8an feed. I'd be interested to see what the base pressure would be with stock lines. If it would stay 58-60psi you could have Eric set the chip up for it, it'd make 80lb injectors 96lbs. The pumps themselves are $125ish usd

[Forzfed]

something is changing the laws of physics.  If the fuel pressure is there, then the volume is there.  Gonna be hard to blame it on the pump

Unlesss the gauge is bad

That is if everything is working as it should.  I see it all the time at work the gauges read the right pressure but we don't have flow, this is usually caused by leaks.  And of course because there is always lazy people they don't fix the leaks and turn up the pressure.

[Scoobum]

Pump hasn't arrived...but I just dropped the tank out. Lines and hanger look fine. I swapped a new fuel filter in yesterday.

[Steve Wood]

something is changing the laws of physics.  If the fuel pressure is there, then the volume is there.  Gonna be hard to blame it on the pump

Unlesss the gauge is bad

That is if everything is working as it should.  I see it all the time at work the gauges read the right pressure but we don't have flow, this is usually caused by leaks.  And of course because there is always lazy people they don't fix the leaks and turn up the pressure.

We measure pressure in this case at the end of the rail which is after the last injector.  If you have the correct pressure there, then the injectors will all be receiving the correct flow at that point in time UNLESS the gauge is reporting the wrong pressure and the correct pressure is NOT the correct pressure.

Come on, let's stick to the particular subject at hand. 

[Scoobum]

Steve mentioned it earlier that fuel pressure gauges...REAL GOOD ONES...ain't cheap. I have an Autometer and it checks in at 315 bucks...plus 13 percent sales tax. I'm sure there are better ones...but it's what I can afford. It was saying 60 lbs at WOT last Friday nite with the base pressure at 44. Whether the 60 lbs is accurate...is up for discussion.

[Steve Wood]

I would think it's right.  Therefore, I would start with the assumption that the flow is not there.  You can check all the hoses for kinks, collapses, and/or leaks, but your path of swapping pumps first is probably the easiest step and it allows you to make sure you have a good hose in the tank that is well clamped.

I would expect good pumps to last for years...but?

[Scoobum]

I was talking to a friend that's the lead wrench on a Super Stock team last nite. He seems to think that race gas shortens a pumps life.

[Scoobum]

I had a look at the in tank hose and it's well clamped and appears fine.

[Forzfed]

We measure pressure in this case at the end of the rail which is after the last injector.  If you have the correct pressure there, then the injectors will all be receiving the correct flow at that point in time UNLESS the gauge is reporting the wrong pressure and the correct pressure is NOT the correct pressure.

Come on, let's stick to the particular subject at hand. 

That is a function of shift work, especially getting off of nights.  So, your saying there is a leak in the rail?

[Steve Wood]

No

[Scoobum]

Went to remove the pump from the hanger...and the purge hole on the bottom had some white...what seemed like material that looked a lot like what the sock is made from covering it. Regardless...t he new pump is going in.

[Scoobum]

Twisted the key...heard it come on...and fired it up. We'll test it Saturday morning during dial ins. Thanks for everyones help so far.

[nocooler]

I forget does Jack warranty his stuff? I know getting tech support used to be a hassle at times. My racetronix leaks down and takes a second wack of the key to prime, but once it's running it's fine 58-60psi.

[Scoobum]

Same shit...low 02's in high gear on default with low boost. SM decided to take a crap. There's a practice next Friday. I'll swap the ECM out. If it pulls the same shit, then I'm parting ways with it. My patience is wearing thin.