My fuel pump fuse blew out right after I start up my Max, she's been sitting for a couple of weeks. The relay is good and wiring looks good, ecu is good, I think that maybe the FP is old/worn cause it to try and pull more power to get going. She has also had problems starting on first try, I thought that it was either the exhaust/o2 problem or maybe the starter was going but I guess it's the fuel pump. I'm very experienced automotively but still like help or heads up on particular vehicle's, you know things that go wrong commonly on certain auto's. I'd appreciate any suggestions in this area, thanks.

 

Disconnect the wires from the pump and see if the fuse (F32 15Amp) still blows, if it no longer blows the fuse your fuel pump motor is shorted.

 

Obviously if it still blows its a short in your harness. To chase a short in your harness replace the fuse with a breaker and leads. Plug a test light into the pump connector and shake the harness untill you find the trouble spot.

 

I put in a 20 amp fuse and it starts right up like I thought it would, To my knowledge if it does this the FP itself has a short and not the harness. But checking the harness itself might work, it would be cheaper too to replace some wiring. What is your opinion about it working w/20 amp fuse? I know that's not a good idea, I just did this to test a hypothesis that the FP itself was worn and pulling more power to run.

 

This is what I'm thinking my self, as stated in my previous post a 20 amp will hold with popping and the FP works. I couldn't do anymore than this today because I had a fam emergency but hopefully sometime tomorrow I will be able 2 dig into this cause I got some HP Exhaust 2 install. Thanks much my dudes.

 

This means that your fuel pump motor needs more current than is normal to operate and will probably need to be replaced soon.

It is still possible that you have an issue with the wiring or the pump relay. If possible Try swapping the fuel pump relay with another of the same type ( the suroof relay is next to it) to help eliminate that as the cause. These relays are located behind the kick panel by the drivers left foot.

 

I have a spare fuel pump relay and tried that already and it's good, I'm at the same place your at, the FP motor is worn and drawing more power to start her up, when I put in 20amp fuse it holds, which is how I'm at that conclusion.

 

The relay shouldn't draw any additional current to the fuel pump fuse if its still turning on the fuel pump. It's either connected or not connected, its pretty much a mechanical connection in the switched side.

I think the Original poster is correct in that most likely his Fuel Pump is on the way out. I am not saying it can't happen but wiring short would 99.9% likely still blow his fuse. It would have to be some very minor scuff and oxidation. He could have some corrosion somewhere in his fueling pump wiring that could create a slightly higher current draw.

 

Yes it runs w/20amp fuse but w/right fuse it keeps popping, the wiring is clean, the fuse box is good and the harness looks good, also I have a spare relay and that's good. I appreciate everyone's help, I'm going 2 go over everything again 2 make sure and then order a new fuel pump w/parts kit 2 replace all the little things connected 2 FP, I'll chatback after install 2 let you all know what happened, thanks again.

 

The fuel pump is basically a coil. You could compare the resistance between your old pump and a new one. If your old one has a much lower resistance than the new one that could indicate it is faulty.