Tip & How-To about Ford F-350

How to tell determine if your injectors, harness, IDM is bad

Well there really is no easy way to test injectors without a $20k flow jet machine.
The only thing you can do on your end is pull the one valve cover off at a time and run the motor (don't worry it doesn't spit as much oil as every one says and it's not messy at all) just wear your safety goggles. This is also the time to change the glow plugs if you haven't done so ($60 for a set of 8) and check all wiring and connectors for wear burned pins.
Once motor is started See if all injectors are cycling the correct amount of oil (from the oil deflector tubes). each injector should spit oil after it fires and if one is spitting less or not at all it's bad/worn or your valve cover harness has a melted pin or even possibly an IDM wiring/module issue. I would do that first to see if any injectors look out of place as its the cheapest, then you can start to diagnos why its not firing.
Other then that you can have a buzz test done (for about $20-$25 at any auto shop some do it for free) and see if all the solenoids are at least operational and that the circuits to each injector is functional.
I also had 1 burned pin under the valve cover and its not frequent that it happens but not uncommon to have one or two every now an again. If you want them all tested most local places charge about $25-$35 per injector to test so $200-$280 for all 8 and they will let you know if they're good/bad etc and most can rebuild if neccessary..

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when u start the car it dies out why?

There are many issues that can cause this. Most common are fouled spark plugs, clogged fuel injectors, bad Oxygen sensors, PCV valve stuck, broken or disconnected vacuum lines. DFENSO plugs and O2 sensors will fix those problems. Vacuum lines require a thorough inspection using the diagram inside the hood; tracing every line and inspecting for cracks. Your fuel injectors are also DENSO, they can be cleaned using specialized machines... a Bosch service center has the machine to clean them and test the spray pattern for proper flow. Vacuum lines are easy to replace and the PCV valve just screws on. If these don't work, then you have an ECU problem. Rebuilt ones are available on line for around $100.

Mar 12, 2015 | 2004 Honda Accord

1 Answer

Just put a new delphi fuel pump in my1996 grand caraban did this twice. Still im geting no pressure at the shrader vaulve. Van runs on either. The pump and regulator are the same assembly is the pump the problem

Not likely. It is also not likely that the regulator is in the fuel pump assembly. Some people mistake the check valve in the pump as a regulator. Also, some vehicles have a pump module which includes the fuel gauge sensor and that can be mistaken as the regulator by some DIYers. The caravan uses a return-loop fuel system. This means that the pump is cycling fuel from the tank to the fuel rail on one line and the fuel that is not needed at the injectors flows back through another line to the fuel tank. This is done to prevent the pump from building up too much pressure and allows the fuel flowing through the pump to keep it cool. Because of the looping system, there needs to be a flow restrictor (aka regulator) at the fuel rail to provide a constant pressure source for the injectors. The regulator is normally at the end of the rail and will have a vacuum line attached. Pull the vacuum line, place a rag at the vacuum port, and crank the engine. There should be no fuel coming out the port. If any fuel comes out of the vacuum port, the regulator is faulty. The regulator could still be faulty even if there is no fuel from the port, but fuel leakage is an easy way to be sure. If the regulator is not providing proper restriction to maintain pressure, then the fuel simply flows in a circular loop from and back to the fuel tank without enough pressure to allow the injector to do their thing,

Nov 07, 2014 | 1996 Dodge Grand Caravan

1 Answer

have 95 tracker. Front cylinder has spark injector clicks when turn to on. pull injector wire runs same, pull plug wire runs same? what should i do next?

spark injector? no such An-i-mule.

the G16B (KV) engine, is it? has 4 spark plugs
and 4 fuel injectors.??
so you pulled what?
you have a dead cylinder, if you check the heat on the front
exhaust header tube, it will be cold or way colder ,using any pyro gun.
which engine,
see them here, ?

whats next that is easy its called a compression gauge.
i must guess engine, do the top valve cover on the engine shout
16 valves?
if yes, make sure the spark wells (deep pits) are not full of oil
or water. if full of oil, the last owner never check valve lash
at 60k miles and replace the valve cover gasket (set)
or if water someone used pressure washer on the engine (bad)

the full compression test is here.

Sep 24, 2014 | 1995 Geo Tracker

1 Answer

94 transport engine miss

Have a compression test done on the engine. Check for burnt valve or bent valve on that cylinder.

Apr 28, 2013 | Cars & Trucks

1 Answer

Oil on the spark plugs/failing cylinder?

The important question is - oil on the top half of the spark plug, or oil on the bottom (fire) end of the spark plug?
Oil on the top end of the plug means that your valve cover gasket is leaking. This is a common problem. BMW valve cover gaskets get hard and shrink and have to be replaced about every 10 years. It is an easy do-it-yourself repair, but it can take a while to dig the old hardened gasket out of the valve cover without scratching it. Just be patient.
If the bottom (fire) end of the plug is wet, either the plug is not firing due to a failed coil or some other electrical problem, or you have bigger problems in that cylinder. A compression test is in order.

Sep 13, 2011 | BMW 325 Cars & Trucks

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