4 Common Fuel Injection Pump Problems

 · With a near-empty tank, the fuel system is suddenly pushing air instead of diesel fuel. Anything but diesel fuel can wear out the fuel pump bearings, which means the fuel injectors will not receive the fuel at the pressurized level (30,000 psi, 40,000 psi, etc.) it should be. Problem #3

 · Target Air/Fuel Ratio Most high performance engines will idle well with a target air/fuel ratio between 13.5:1 & 14.2:1. This surprised me, and I wasn't comfortable with it at first, because I thought the idle should be leaner at a stoichiometric 14.7:1 AFR.

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Fuel Tank Venting

You cannot put fuel into your tank, unless you can get the air out...and you cannot withdraw fuel from your tank unless you can let air in. Up through the 's, most vehicles used vented gas caps. This is simply a gas cap with a hole in it. Unfortunately, this hole would allow the fuel to splash out when accelerating or turning a corner.

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IST Products

 · IST was the first to recognize the air-fuel ratio adjustment problem, and the first to offer a solution way back in !! The first DIGITAL ELECTRONIC solution that allows you to adjust your air-fuel ratio rich or lean, to accurately match the Mass-Air Flow Sensor calibration to your engine.

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How to Convert from a Carburetor to Electronic Fuel Injection

 · These two kits support return- and return-less-type fuel systems. If you use a return-less type fuel system, MSD says the fuel pump must be installed in the tank. MSD also specifies that if the pump is installed outside the tank, it should be within two feet of the fuel-sending unit in the tank.

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How to Adjust an Air Fuel Mixture Screw: 7 Steps (with

 · Tightening the screw weakens the air and fuel mixture and decreases the amount of fuel flowing to the engine. Tightening the screw is also called making the fuel mixture leaner, which lowers the RPMs at which the engine idles. Running a lean fuel mixture makes the engine run with less fuel than it needs to run efficiently.

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Advanced Tips for EFI Tuning with Fuel Pressure

7.) The objective of changing fuel pressure is to optimize air/fuel ratio (AFR) for best wide-open-throttle (WOT) power. Tuning with the aid of a wide-band O-2 A/F meter is strongly advised. 8.) Adjusting the base fuel pressure of most modern, EFI engines will initially affect both the WOT and idle/cruise AFR.

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Recommended 350 TBI modifications

For over 450hp you really should be looking at alternative injection system but for up to 450hp you would need to run nearly 22-26psi of fuel pressure to increase the lb/hr rating on 454 injectors to 112lb/hr and that is as much pressure as I recommend applying to a set of TBI injectors. 10. The chip.

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Will I Gain More Horsepower With An Exhaust System

After-market exhaust systems are almost always less restrictive than factory exhaust systems. However, that doesn't mean that adding an after-market exhaust will always result in more power.Depending upon your vehicle and the system you choose, an after-market exhaust can add as much as 50 horsepower or as little as 2 or 3 horsepower.

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13 Removing Catalytic Converter Pros and Cons

 · 1. Your exhaust sounds better. The catalytic converter works like a muffler on the average vehicle. Its job is to reduce the impact of the gases emerging from the engine due to the combustion and burning of fuel. This action muffles the sound of your exhaust in combination with the muffler on your vehicle.

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Engine Cranks But Will Not Start (No Smoke From Exhaust

 · Check to be sure the manual shut-off lever is in the "Run" position. OK If the condition occurs during initial start, following an extended period of non-use or replacement of a fuel system component, air is in the fuel system.

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4 Common Fuel Injection Pump Problems

 · With a near-empty tank, the fuel system is suddenly pushing air instead of diesel fuel. Anything but diesel fuel can wear out the fuel pump bearings, which means the fuel injectors will not receive the fuel at the pressurized level (30,000 psi, 40,000 psi, etc.) it should be. Problem #3

The air-fuel ratio sensor monitors the oxygen content in the exhaust stream and sends data to the computer so that it can add or subtract fuel. If there is any problem with the sensor, it can send a bad or false signal to the computer which can throw off its calculations and cause it to waste fuel excessively.

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EFI Idle Tuning Notes

 · Target Air/Fuel Ratio Most high performance engines will idle well with a target air/fuel ratio between 13.5:1 & 14.2:1. This surprised me, and I wasn't comfortable with it at first, because I thought the idle should be leaner at a stoichiometric 14.7:1 AFR.

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25 Ford Windsor 302/5.0L EFI Engine

 · A typical Ford 5.0L V8 SFI engine in a Mustang with the stock Speed Density-based air/fuel metering system. Mass Air metering came in on California 5.0L HO cars and went nationwide in .

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5 Symptoms of a Bad Idle Air Control Valve (& Replacement

 · Since the idle air control valve is supposed to manage the idle speed of the engine, a bad valve will certainly throw that out of whack. It will cause the idle speed to randomly fluctuate to different speeds rather than stay at one constant speed. The idle speed may be too high at one moment and then too low at other moments.

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Remap My EFI After New Exhaust?

 · Just got a soft tail slim s. My first bike. I want to get the hacker custom exhaust mayhem. It come w a fuel map for 250 xtra. Will that also take care of a new k&n air filter/ intake, or should I ask hacker if it will be programmable for further updates later ie: k&n or other air ….

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By The Numbers: Tuning Fuel Injection with Air/Fuel Ratio

Lambda isn't just used in the EFI world. Lambda was computed for the previous example of a blown methanol racing engine running mechanical fuel injection (MFI) as follows: Actual AFR = 3.4 to 1 (weight of air & fuel computed with MFI jetting calculator for the 'best-run' setup of the blower / fuel ….

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How to Convert from a Carburetor to Electronic Fuel Injection

 · These two kits support return- and return-less-type fuel systems. If you use a return-less type fuel system, MSD says the fuel pump must be installed in the tank. MSD also specifies that if the pump is installed outside the tank, it should be within two feet of the fuel-sending unit in the tank.

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MERCURY OPTIMAX FUEL RAIL REPAIR

The OPTIMAX is the most MIS-DIAGNOSED engine out there. Symtoms caused by leaking REGULATOR DIAPHRAMS point to: Bad Injectors Bad Fuel Pumps Leaking VST Air in Fuel Lines Bad Gas Bad TPS Rubber Regulator Diaphrams dry and crack because of today's fuel content. Also, low engine use tends to dry out the Diaphrams.

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EFI Regulators

That work continues today through Holley's market-leading EFI products as well as through Holley's family of best-in-industry brands. Top brands like MSD, Flowmaster, Hurst, Accel and many more make up the industry's leading offering of enthusiast-driven products to deliver robust, complete performance solutions for builders, racers, and.

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Air & Intake

Manufacturers occasionally suggest that products be advertised at their suggested retail price. Because our price on this item is lower than the manufacturer's "minimum advertised price", the manufacturer does not allow us to show you our price until you place the item in your shopping cart.

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The Air Intake System: How It Works

 · The air then passes through the engine air filter, usually located in an "air box." Pure "air" is a mixture of gases

A high pressure fuel pump supplies fuel to the area around the injector and the regnlator maintains the fuel pressure in that area at 35 -40 PSI. The injector is a solenoid operated pintle valve that meters fuel into the intake manifold depending on engine operating conditions and generator amperage load as determined by the ECU. Air flow into.

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How to Start a Diesel When it Runs Out of Fuel

If a diesel powered truck runs out of fuel, it will not restart after you have obtained some diesel and put it in the tank. A diesel will not pull the fuel from the tank to the engine if the fuel line is full of air. You must first prime the engine with fuel before attempting a successful restart.

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Tips For Tuning Aftermarket EFI Systems

 · EFI University offers the most popular EFI-101 class, the challenging EFI Advanced class, and a Wiring Harness Workshop. Benjamin M Strader, Senior Instructor at EFI University and author of "How to Build and Tune Custom EFI Systems", has over 8 years of experience tuning and troubleshooting aftermarket electronic fuel injection systems.

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Mustang Fuel Systems Explained

The fuel pump is responsible for getting the fuel out of the tank and into the feed line in order to reach the fuel rails and injectors. The flow rate of a fuel pump is determined by its design and size, but they also rely on two variables. The amount of power being supplied to the pump and the desired pressure of the fuel ….

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