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How to install fuel injection in the correct order

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Their is no correct order that i know of ? i just rebuild a engine and mount it all on and away it goes ,never even heard of a correct order can you imagine this on a assembly line of a car plant moving at 3 cars a minute?????? i have worked in one many moons ago and no way was anything as complicated as this for a unskilled worker to assemble a car or any part of it other than keeping up with the line

Posted on May 11, 2014


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What is the firing order?

Firing order is the sequence of power delivery of each cylinder in a multi-cylinder reciprocating engine. This is achieved by sparking of the spark plugs in a gasoline engine in the correct order, or by the sequence of fuel injection in a Diesel engine.

Dec 23, 2015 | Cars & Trucks

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My is putting to much fuel or no enough oxygen where is the sensor. Mercruiser 6.2 2002

All MerCruiser EFI engines operate on the fuel injection strategy called "Speed/Density". This means that the ECM primarily looks at the engine's speed and the intake manifold's air density in order to calculate the correct amount of fuel to inject. The engine requires an air/fuel mixture of approximately 14:7 to 1 in the combustion chambers. Since the EFI system doesn't control air flow, it must determine how much air is flowing through the engine in order to calculate the correct amount of time to fire the fuel injectors. The net result is that there must be 1 part of fuel for every 14.7 parts of air going through the engine. in this case there is no sensor but you need to determine the speed/airflow measure to know if your mixture is right.

Feb 01, 2015 | Cars & Trucks

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No firing after carburator fitted from fuel injection

map sensor will stop all fire if not hooked up correctly. In order for you to run a carb, you will also have to remove the electric fuel pump from the tank, and install older style tank. if you try to use the electric pump in tank, it runs at much higher pressures, which will flood the carb with fuel, and the carb float will not be able to hold it back. So what are you going to do for a fuel pump? This is always a bad idea, best bet if you want to run a carb, is to get an engine set up for one and scrap that fuel injected block as it don't have a place to mount a mech. fuel pump. bad idea, bad idea, bad idea, your just spinning your wheels mate!

Dec 16, 2013 | Cars & Trucks

1 Answer

1994 CHEVROLET C1500 PICKUP 4.3L V6 vortek cranks no start backfiring thru the Throttle body fuel injection system. The Distributor has a small hairline crack under the reluctor wheel could this be the...

100 psi per cylinder is way too low--should be in the vicinity of 150-165 per cylinder
back firing indicates wrong firing order and as you have replaced the plugs etc check that you have the leads on the correct plugs in the correct order
the timing for the engine should be around the 10 degree btdc and not tdc

Mar 23, 2017 | Cars & Trucks

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Hey, well I did a tune-up on my 1988 Firebird and now it won't start. It has the 2.8L V6, fuel injected (don't know really anything about fuel injection). I changed the cap, rotor, wires, plugs,...

Hi Jeff,
The first thing is that you will want to double check the firing order, this is often the major set back on tune ups and can get confusing. The next thing would be (this is only if you changed that fuel filter) be sure that the filter is installed in the correct direction of flow. After all that is verified that it is correct and accurate I would need a specific list of what precisely you have done to the vehicle as far as the replaced services.

Keep me posted,


Oct 16, 2011 | Cars & Trucks

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I need firing order

  • Hi, I can help. Please see the diagrams I uploaded for your firing order. You did not list weather you have fuel injection, turbo or carburetor so I will list all 3 possibilities for you.

  • This is the firing order for a carbureted.


  • This firing order is for a fuel injected turbo engine.


  • This firing order is for fuel injection with out turbo.


  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

Aug 24, 2011 | 1984 Buick Regal

1 Answer

I did a Tune up on a 1992 Mitsubishi mighty max I changed the oil & Oil filter, the spark plugs and spark plug wires, the air filter and i changed the distributor cap and rotar. after all that i am...

it is fuel injected and the injectors are in a manifold at the inlet manifold
most misfires are injector related ( dirty tips , low fuel pressure or injector wiring harness) get a workshop manual from an auto parts shop

May 25, 2017 | 1992 Mitsubishi Mighty Max

1 Answer

Choke not working, will not Idle when cold

First, your engine has fuel injection and has no choke. In a carbureted car, the reason there is a choke is to restrict air flow in order to change the mixture of air and fuel entering the engine. Since fuel flow cannot be easily altered you just limit the amount of air going in, resulting in a rich mixture.
In an injected engine, air flow remains the same and additional fuel is added by keeping the injectors open longer.
The computer gets information from several sensors in order to know when the engine is cold or hot, or, to know what the outside air temp is. The sensors that are primarily responsible for that are the coolant temp sender and the intake manifold air temp sender. However, the coolant temp sender cannot work properly unless you have the correct thermostat installed (195 degree (f)) But, generally that helps more in making it run correctly after it's warm.
Therefore, check or replace the coolant temp sender and the intake manifold air temp sender.
Testing can be done using a digital multi meter following instructions found in either chiltons or haynes manuals,
Also make sure spark plugs, ignition wires and the cap, rotor, and coil (if you have them) are in good condition as when cold, any moisture or condensation on ignition parts can cuase spark bleed off and make the engine run poorly as well.

Nov 28, 2010 | 1999 Jeep Cherokee

2 Answers

2001 grand cherokee laredo 3.1 diesel would not start

it could be that one of the injectors is bleeding off pressure not allowing enough fuel pressure to start. the 5.9 and 6.7 cummins need at least 2000 psi to start

Jan 07, 2009 | 1995 Jeep Grand Cherokee

1 Answer

Firing order

Which engine do you have in your truck. Ford had a couple of firing orders as per engine that was installed.

Jun 11, 2008 | 1995 Ford F150 Styleside Regular Cab

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