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47 Posts
:mad2:
I've been working this problem for quite some time. I'm in Mexico so I'm on my own on this but a willing participant nonetheless.
99 CV P73, 245000 miles.
Cold start stumbles, coughs, kicks and complains but when I goose it, (Italian tune-up), it seems to run fine with no problems unless it sits for several hours.
Replaced EGR, Idle Control, MAFlo, IAT, plugs, coils. Vacuum lines look good. I checked the fuel pump relay, it works when tested, but I don't hear the pump running when I turn the ignition on (no start).
I get 12 volts at the relay base but I's probably low amp until the computer turns it on. IN any case, it's not coming on. When I jump the contacts at the relay base, I hear the pump and get pressure at the pressure relief. I don't have a pressure gauge however, and I do not get a gush of fuel, just a trickle, whether the car has been sitting all night or when it has just shut down. I did not check it while the engine is running.
The fuel filter was changed a few years ago and there are no performance issues after the engine settles down, so I am not certain about a fuel delivery issue; I think it's OK. (Unplug the relay, engine shuts down.)
I have a scantool program (ScanXL from Palmer with the Ford Enhancement) so I can see all data. I can't see fuel pressure data on the rail however. Maybe someone can tell me if the PID exists for 99.
The gas cap is tight, I can't see a crack in the intake (plastic) manifold, but that doesn't mean there is not one there.
This problem has been going on for several months, maybe a year. I've resorted to the "Italian tune-up" method to overcome the bad starting but I think I need to address this now. I also recently discovered that my right side catalytic converter is probably bad, it rattles now (internally).
This car has been well maintained with all needed repairs done in a timely manner. I've replaced a rear axle, harmonizer pulley, idler tension pulley, alternator, sensors mentioned above, front end components etc. It is entirely stock with no mods whatsoever. I have the shop manual and the Alldata subscription. Access to tech data is not a problem, testing equipment is.
At this point, I'm probably looking at an intake manifold and fuel pump unless someone a lot smarter than me can give me some tips, especially explaining the fuel pressure and pump relay workings, that would help. Like everyone, I'm limited financially but I want to keep the car. I bought it new and I love it.
Let's see what you can do.
I've been working this problem for quite some time. I'm in Mexico so I'm on my own on this but a willing participant nonetheless.
99 CV P73, 245000 miles.
Cold start stumbles, coughs, kicks and complains but when I goose it, (Italian tune-up), it seems to run fine with no problems unless it sits for several hours.
Replaced EGR, Idle Control, MAFlo, IAT, plugs, coils. Vacuum lines look good. I checked the fuel pump relay, it works when tested, but I don't hear the pump running when I turn the ignition on (no start).
I get 12 volts at the relay base but I's probably low amp until the computer turns it on. IN any case, it's not coming on. When I jump the contacts at the relay base, I hear the pump and get pressure at the pressure relief. I don't have a pressure gauge however, and I do not get a gush of fuel, just a trickle, whether the car has been sitting all night or when it has just shut down. I did not check it while the engine is running.
The fuel filter was changed a few years ago and there are no performance issues after the engine settles down, so I am not certain about a fuel delivery issue; I think it's OK. (Unplug the relay, engine shuts down.)
I have a scantool program (ScanXL from Palmer with the Ford Enhancement) so I can see all data. I can't see fuel pressure data on the rail however. Maybe someone can tell me if the PID exists for 99.
The gas cap is tight, I can't see a crack in the intake (plastic) manifold, but that doesn't mean there is not one there.
This problem has been going on for several months, maybe a year. I've resorted to the "Italian tune-up" method to overcome the bad starting but I think I need to address this now. I also recently discovered that my right side catalytic converter is probably bad, it rattles now (internally).
This car has been well maintained with all needed repairs done in a timely manner. I've replaced a rear axle, harmonizer pulley, idler tension pulley, alternator, sensors mentioned above, front end components etc. It is entirely stock with no mods whatsoever. I have the shop manual and the Alldata subscription. Access to tech data is not a problem, testing equipment is.
At this point, I'm probably looking at an intake manifold and fuel pump unless someone a lot smarter than me can give me some tips, especially explaining the fuel pressure and pump relay workings, that would help. Like everyone, I'm limited financially but I want to keep the car. I bought it new and I love it.
Let's see what you can do.