I need a injector harness for my 1989 mazda Mvp van.
I paid a guy to do a motor exchange and he didn't get all my old wiring off the old motor before he let someone scrape it out. Having a hard time finding harness and injectors. Do you know any place that might have it?
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So we would have to assume from what you're saying that the injectors are not being pulled to ground by the computer. Have you tried listening to them with a mechanics stethoscope? The computers are a common problem but if another one gives the same result then I'd have to say that the wiring harness between the computer and the injector is suspect. You will have to check the continuity between the injector plug and the connector that goes into the computer. You will need a wiring diagram but I think the wire colors at the injector should be the same as they enter the computer. I would strongly suggest that you confirm fuel pressure though. I know what you mean by fuel at the injectors, but pressure is important.
YOUR BEST BET IS TO GO AHEAD AND REPLACE YOUR FUEL INJECTORS. BY POURING GAS IN TO YOUR INTAKE. YOU KNOW ITS GOT TO DO WITH YOUR FUEL SYSTEM. I TAKE IT YOUR CHECKING FURL PRESURE ON THE CHECK VALVE ON THE FUEL RAIL FOR THE INJECTORS. REPLCE THOSE AND YOU SHOULD BE GOOD. JAKE.B
sounds like you have a dead ignition coil very common problem. to check the ignition coil and fuel injector harness without a scan tool you can use a noid light. it is a 12volt light bulb that connects to the harness side and flashes indicating that the computer is firing the injector and or coil. there is no specifications to check the ignition coils the best way is with a scan tool see witch cylinders have the most counts in the misfire history your local dealer may also be able to perform a cylinder balance test to find the dead hole. unfoutunatly you have to remove the doghouse to access the rear coils and fuel injectors.
you may need to clean the injectors what you can do is you can buy some injector cleaner and see if this helps make Shaw you get a decent brand as the cheep ones do not work as good drive around with this in your gas tank when you have in in your gas tank it helps clean them if you do some harsh acceleration but don't race the motor and don't speed in other words get to the speed limit fast this will apply pressure and will push through any gunk build up there may be some smoke for a while from the exhaust but is will go back to normal when the fuel injector has finished cleaning and all the build up is gone hopes this helps
Make sure you are getting gas and spark, they are a few ground wires that come off of injector harness that if they are not grounded will cause injector NOT to pulse re-check wiring and get back to me. Good Luck