Question about Mazda B2600
Hi, I recommend you check the circuit opening relay socket to see what is going on. Pull the relay out and use a 12 volt test light or voltmeter to check for the appropriate ground signals. With the test light clip or voltmeter probe on battery positive, probe the socket with the other lead. There should be 2 ground terminals--one from the black wire for the opening coil and one from the check connector. Both these terminals should light the test light. If not, trace the wires to see why. Also check all of the fuses involved, such as the engine fuse, EGI fuse, and room fuse.
Posted on Mar 29, 2011
If you can give me the year and model, engine size of your vehicle would help. But in conclusion it sounds like you have one of the following problems: 1. Faulty injector pump relay. 2. Your crank angle and/or camshaft sensor is faulty. 3. Your power supply to the injectors module is faulty.
Let me know if you need more help.
Posted on Mar 28, 2011
To begin, all engines using fuel injection do in fact require some slightly different fuel system maintenance! The normal wear and tear with today's underhood temperatures and changes in gasoline quality suggests some buildup of olefin wax, dirt, water and many other additives. Unique to each engine is an air control design that also may suggest different levels of carbon deposits, such as oil control or just the location of the component or control device itself.
To simplify the approach, I will use the word "service" since the phrase "injector cleaning" is misleading as to the real function needed to maintain the vehicles of today!
Fuel Injetor System Service
(Note the words "system" and "service" in the subtitle, and not "cleaning!")
The proper steps in fuel injector system service are:
* Check fuel pump operating pressure and volume.
* Test pressure regulator for operation and leakage.
* Flush entire fuel rail and upper fuel injector screens to include pressure regulator.
* Clean fuel injectors.
* Decarbon engine assembly.
* Clean throttle plate and idle air control (IAC) passages.
* Check minimum air flow rate and adjust if needed.
* Relearn onboard computer.
All eight steps may be performed using one of the "two-line" fuel injector service units. (Carbon Clean, Injector Test, DeCarbon and Motor-Vac, to name a few.)
Check fuel pump operating pressure and volume
The missing link here is volume, as most working technicians assume that if the pressure is correct, the volume is OK also! By hooking up a fuel pressure tester to the fuel rail inlet and return, and using the pressure side feed t-Ed into the fuel unit, we can quickly test the fuel pressure with engine running but also at the same time test the volume of the pump by stealing fuel into our holding tank (one pint in 30 seconds is the usual specification). When proper volume is flowed into the tank, we would shut down the engine and change hose connections to allow the machine to be put in control of the fuel supply system. The two line system would be attached to inlet and return on the fuel rail, with the vehicle's onboard system being "looped" and returning fuel to the tank. This prevents disabling of the factory unit.
Test pressure regulator for operation and leakage
At this time, the regulator would be tested for operational pressure and proper regulation including leakage. (This works well as the operator has total control of rail pressure with the unit control valve.)
Points to Ponder:
* Good pressure doesn't mean proper volume! Example: A clogged filter may test OK on pressure, but restriction may not allow proper volume under load!
* There is some logic to using the vehicle's gasoline to service the system as opposed to a can of shop gasoline that has been around for some time!
* Pressure regulators do fail and a lot more of them don't properly shut off the fuel, causing higher-than-normal pump wear and shorter life!
Test it and keep us updated.
Posted on Mar 27, 2011
Welcome to Fixya
Sounds like you need to replace the fuel pump. Here's a simple procedure to test your fuel pump.
Please let me know if you need further assistance.
Thank you for using Fixya!
Posted on Mar 26, 2011
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Posted on Jan 02, 2017
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