Hi,
So I’m wondering if anyone can help me out with my 99GT. It’s a 4.6GT Auto with 58k miles. It’s all stock except for a MAC catback. It has been sitting in my garage for about 3 years… I know.. sad since it’s in excellent condition. Things happen in life… anyway.. I’m getting it ready to enjoy again.. last time it ran it had a miss and started leaking antifreeze in the front.. so I pulled the stock original 99 intake and replaced it with a FRPP M9424P46 intake with the alum crossover. The swap went quick and easy.. I put in a new thermostat, gasket, used the later alternator upper bracket, swapped new NGK plugs in, changed the oil, refilled the coolant and bought a new battery. Well, she didn’t start. The confirmed that the fuel pump is not priming and there is no pressure at the schrader valve. Key on I do get 12v at the fuel pump connector just behind the tank so I’m pretty sure the pump is bad. I ordered a stock 130lph fuel pump assembly and fuel filter to swap in.. that will be here by the end of the week.
So while I’m fairly sure the new pump will fix it, there is one weird thing that it’s doing. Now keep in mind that I checked continuity on every fuse both under the hood and under the dash. All are fine except one 20A fuse in position 6 listed as “Starter Motor Relay.” I replaced it and it made no difference but it has not blown again. Anyway, the digital odometer is blank when you first put the key on. Blank as in nothing. No dashes, the theft light is not flashing so I believe PATS is not an issue. Eventually the odometer will light back up.
Edit: I forgot to add that I ran codes with my scanner and none came up. I did spray carb and injector cleaner into the throttle body and it did start for a split second.
So does any of this sound familiar? Any ideas? Is the fuel pump to blame? Are these two different issues? Is the Earth round? Lol
Any and all help is greatly appreciated.
Thank you,
Adam
So I’m wondering if anyone can help me out with my 99GT. It’s a 4.6GT Auto with 58k miles. It’s all stock except for a MAC catback. It has been sitting in my garage for about 3 years… I know.. sad since it’s in excellent condition. Things happen in life… anyway.. I’m getting it ready to enjoy again.. last time it ran it had a miss and started leaking antifreeze in the front.. so I pulled the stock original 99 intake and replaced it with a FRPP M9424P46 intake with the alum crossover. The swap went quick and easy.. I put in a new thermostat, gasket, used the later alternator upper bracket, swapped new NGK plugs in, changed the oil, refilled the coolant and bought a new battery. Well, she didn’t start. The confirmed that the fuel pump is not priming and there is no pressure at the schrader valve. Key on I do get 12v at the fuel pump connector just behind the tank so I’m pretty sure the pump is bad. I ordered a stock 130lph fuel pump assembly and fuel filter to swap in.. that will be here by the end of the week.
So while I’m fairly sure the new pump will fix it, there is one weird thing that it’s doing. Now keep in mind that I checked continuity on every fuse both under the hood and under the dash. All are fine except one 20A fuse in position 6 listed as “Starter Motor Relay.” I replaced it and it made no difference but it has not blown again. Anyway, the digital odometer is blank when you first put the key on. Blank as in nothing. No dashes, the theft light is not flashing so I believe PATS is not an issue. Eventually the odometer will light back up.
Edit: I forgot to add that I ran codes with my scanner and none came up. I did spray carb and injector cleaner into the throttle body and it did start for a split second.
So does any of this sound familiar? Any ideas? Is the fuel pump to blame? Are these two different issues? Is the Earth round? Lol
Any and all help is greatly appreciated.
Thank you,
Adam
