Mazda Repair Questions? Ask Mechanics for Answers ASAP
Hi, Bill, my name is ***** ***** I will assist you. Have you checked for fuel pressure at the rail yet?
You are correct, you should hear something when you cycle the key. I assume that this problem was not present before the timing belt snapping?
Ok, I assume that you have something wonky happening, but we will proceed with checks as if it is unrelated to the timing belt, because honestly it shouldn't be.
Start by checking every fuel related fuse and relay in this box
ok, fair enough. Have you tried the old school trick involving banging on the gas tank with a rubber hammer to try and get the fuel pump "jarred" into running again?
If doing that works, then you are looking at a bad fuel pump.
Ok bud, the next step is to check for power to the fuel pump. Are you able to access the wires going under the tank? They should be accessible at some point without pulling down the tank
Alright, I will get you a diagram of the fuel pump wiring. Do you have a test light to check it with?
Perfect! Give me a moment to get that diagram...
Here is the diagram of the pump...
Before you test the pump, check this inertia switch for continuity and make sure it is pushed in. Let me know how it goes!
Yes, that is absolutely correct. Did it buck as if it was trying to start or just nothing?
Have you tested for compression to make sure that the valve train was not damaged when the belt broke or that the timing is correct?
Yeah, I figured you would have noticed if it had no compression... the only other thing I can think of at the moment would be the crankshaft sensor...do you remember unplugging it to do the timing belt? I think that one is located in the rear anyway but its worth asking about
Nope, that sensor is on the front of your engine...you should check the connector if you haven't done so already. That would account for no start with fuel added
I absolutely agree, I just want to try and tie something together with the timing belt incident since it was running perfectly fine before that happened.
The pink and black wire is the one that should provide power to the pump...when you checked the inertia switch, you said that there was power going through it, correct?
Hi bud this is josh checking in to see if you still need help. Also, please take a moment to rate my service!
Great, thanks for the update! I will stand by!
Ok, so did you say that you do have voltage going through the inertia switch? Or was it just continuity
Sorry, I just went back and read it and you said that there was power going through it. This means that unless there is a broken wire between the fuel pump and the inertia switch, the fuel pump is receiving power and still not working. At this point I believe you will need to access the actual pump to verify if the power is getting all the way to the pump.
Unless you have a lift, I would suggest removing the bed of the truck instead of dropping the gas tank. This is usually the easiest way to get it off
Let me know how it goes!