High fuel pressure = lean or rich?

Fuel pressure drop/going lean above 5k - Modular Fords

To produce 60 psi at the injector you could find system pressure as much as 10 psi higher at the pump for a poorly plumbed fuel system. For a ...

Fuel pressure seems fine but AFR's are lean as hell - NASIOC

Pull the vac line off the fuel pressure regulator and check what fuel pressure is at idle. It should be 43.5, yours seems low.

Would low fuel pressure trigger the computer to create a rich ... - Naxja

too much air, or too little fuel is a lean condition. It can't increase fuel if the fuel pressure is not there. Demoniod.. you will see no ...

Fuel Trims—Testing & Diagnosing Rich and Lean ... - YouTube

Fuel Trims—Testing & Diagnosing Rich and Lean Conditions (P0171, P0172, P0174, P0175) ... 139K views · Streamed 7 years ago

lean or rich... - The Galant Center

lean = less fuel in the air/fuel mixture than the stoichiometric ratio. the correct stoichiometric ratio for a gasoline burning car is 14.7 ...

LTF and STF Fuel Trim Feedback Loops: Rich, Lean and in Between

Due to high negative fuel trims, a leaking fuel injector will reduce average fuel injector pulse widths from about 2-3 ms to 1.0 ms or lower to ...

What Are The Differences Between Lean And Rich Mixtures In An ...

In the case of a slightly rich mixture, you may notice reduced engine efficiency and worse fuel economy, but the rich mixture will generate more power and ...

Rich and lean at the same time - ScannerDanner Forum

Vacuume test shows good, fuel pressure test shows good, all coils ... rich lean condition on long term fuel trim. Please Log in or ...

Air/Fuel Ratio - How Does Being Rich/Lean Affect Your Engine?

Not all oxygen in each intake charge is consumed in a combustion cycle. This is the number one reason diesel engines tend to emit higher levels ...

That bank is running rich and the DME is at its lean limit. Fuel ...

The fuel pump should operate and fuel pressure should be (with engine off) 55psi +/- 3psi (3.8 bar +/- 0.2 bar) and with engine running 48psi ...

fuel issue,runs rich,pressure problem? or?

The high fuel pressure overcomes the needle valve seats and causes the fuel to rise and it'll flow into the cylinders. Wet plugs is a good sign ...

Fuel Pressure Regulator And Running Lean - Stangnet

So the sensor will generate less than 400 Millivolts. Remember lean = less voltage. When the mixture is rich, there's less oxygen in the exhaust ...

Too lean, both banks, under load... fuel pressure?

... fuel injectors is showing high oxygen content in the exhaust, via O2 sensor, High Oxygen level = Lean Burn, Low Oxygen level = Rich burn. So ...

Loss of power, high fuel trims under load | E46 Fanatics Forum

@burntoutrubber yep, it makes sense! Definitely, 45 psi it's too little and will cause lean condition. But it seems like neither of the shops ...

Adjustable Fuel Pressure regulator upgrade, Car running REALLY ...

Supa, I am having the same lean problem. I sent my chip to AA and they made an adjustment to run more rich. Don't have it back yet, being ...

LS3 Engine running Rich - HP Tuners Bulletin Board

That fuel pressure is too high. I dislike the corvette filter/regulator combo. If the pump is too powerful it just overpowers that filter.

Fuel Trims – Where to Begin your Diagnosis For Rich or ... - YouTube

... fuel trims and how to use all of that information to your advantage when diagnosing for rich or lean concerns. We explore where fuel trims ...

Running rich ....... best way to lean it out? - TBI - ThirdGen.Org

i would suggest lowering the fuel pressure even further. the operating range on the injectors is from 9-12psi(according to factory specs) so you ...

88 XJS High fuel pressure, I think it's running rich - Jaguar Forums

It's running rich because of the high fuel pressure. I've read that it's supposed to be around 34 and I'm way out of that range.

What could cause one side of the motor to be richer than the other?

Don, I agree with most of what you say except for a single FI causing the bank to be lean. I will say that under higher power, my fuel pressure ...