Should I jump the pump from the fuse? And the reason is to bypass Ignition key?No, the vacuum hose needs to be there for properly operation, but won't affect starting.
You should test the regulator by jumping the fuel pump from the battery with the gauge hooked up and watching for steady pressure. Apply pressure and vacuum to the FPR vacuum fitting and watch the gauge for a corresponding change in fuel pressure.
Jvanabra,this morning I was trying to follow your instruction.First I checked that when I turn the key to ON pump is activated only for the short moment , is that correct? After that as I checked voltage, at the fuse, is dropping down to zero. So, I checked pump by activating it from fuse box (fuse 32), with the key in OFF position. Fuel pressure behaved exactly the same as from the ignition key, which means that as long as I kept voltage the presure was steady about 43 and when i was taking voltage off, was slowly dropping. The only difference was that cooling fan was not activated. Please adviseShould I jump the pump from the fuse? And the reason is to bypass Ignition key?
I was able to repeat this test with aplying my mouth instead of vaccum pomp an pressure dropped down a little, just to 40 or 39. Is that telling you something more??That's positive, but to complete the test you need to add pressure/vacuum to the fuel pressure regulator with a vacuum pump. Although it's unlikely to work properly at rest and then fail with vacuum/pressure, that's the proper way to test the FPR.
Eh, it's better than nothing. Regardless, we know the pump runs when you try and start the car, and we know the regulator is enforcing fuel pressure. That's all you need to start the car.I was able to repeat this test with aplying my mouth instead of vaccum pomp an pressure dropped down a little, just to 40 or 39. Is that telling you something more??
That means that my ECM/ECU is damaged? Can this be in some way checked? What is involved in reprogramming? And what should be done to marry?
Hello my name is Scott. I have an 04 9-3 arc. I feel your pain I've gone through exactly what you are. So I know how frustrated it. In my case I'm a certified mechanic so I was able to troubleshoot my issues. First thing I would do is find a mechanic you can trust who knows European cars. I played stupid with a couple shops and they both tried to screw me. Things you can check on your own. Check every fuse all of them. Check compression you can buy a gauge at any advanced auto parts for about 30 bucks. Check all fluids. Especially coolant. If you can get your scanner to work post all codes. Mine had injector fault 1234 and turbo waste gate codes. That pointed to a bad ECM. I got a used one on ebay for 150 and had it programmed to car. My email is [email protected] if I can help I will I've had 4 9-3s so Ive had slot of experience with themI definietly have to educate myself before testing ECM. It looks that I didn't check maxi fuse2 as Mimmi advised, I just checked regular fuse#30. If I am correct it is located in engine bay, correct? Also what "+30" stands for? Is that connector? or relay?
I found out that on ECM I should check pin 23 (for power supply +30). What else should I check ?
I assume that I should do it with ignition key ON? I am studying Hyness Manual and WIS, but mostly I am counting on help of this forum. So, please guide me
Thanks jvanabra. I just put new vacum hose on FPR and everything is the same. Than I tried again to start with the starting fluid. I tried few times and failed.; Few times it looked like cuthing up but that's it. After that I got to spark plugs and all 4 were completely DRY!!!!!. So what would be my next step.Eh, it's better than nothing. Regardless, we know the pump runs when you try and start the car, and we know the regulator is enforcing fuel pressure. That's all you need to start the car.
Gotta look somewhere else, next. Ignition, injectors, mixture. I don't buy into the low compression scenario. Even a car with next to no compression will start, and you don't just suddenly lose four cylinders of compression after a short drive.