Hey guys, I'm looking for a little help with my Mach 1. I've been having small issues with it that I've been hunting down. Every time I think I've got something fixed it eventually comes back. Until now the car has never thrown a code. Well, last night while I was driving, the car finally kicked on the check engine light. I pulled the codes and this is what I got.:
P0460 Fuel Level Sensor Circuit Malfunction
P0112 Intake Air Temperature Circuit Low Input
P0113 Intake Air Temperature Circuit High Input
P0103 Mass or Volume Air Flow Circuit High Input
P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem
P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input
P0116 Engine Coolant Temperature Circuit Range/Performance Problem
P0117 Engine Coolant Temperature Circuit Low Input
P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control
P0190 Fuel Rail Pressure Sensor Circuit Malfunction
P0192 Fuel Rail Pressure Sensor Circuit Low Input
The issues I've been having with the car are that when I drive, occasionally the motor just dies and if I'm at a stop I can't just crank the starter to start again. I have to full key off and then key on again. Some times this happens to me on the freeway and I just clutch in, key off, key on and pop the clutch. The car starts humming again.
Another issue I've been having is that mostly at low RPMs in just about any gear, when I'm at a low throttle use liek 10% or so, the engine will shudder like its not getting gas. If I am in 6th and I down shift to 5th and it goes from say 1700 RPM to 2200 RPM then the motor typically runs fine at the higher RPM. Some times under hard acceleration I feel like there isn't enough fuel flowing at the higher RPM maybe 5800 and above but most of the time it is ok on the high end. From the 2500-5000 RPM range I don't recall ever having any issues.
The last issue I've had is a wierd hanging idle. The motor will some times, seemingly for no reason hang at either 3000, 2400 or 1200-1400 RPM. Also, the motor tends to sit at 1100 and then come down to 1000 and then come down again to 800. Some times it dips down to 600 and sits there and I am fairly sure once warm it shouldn't be going below 800-900 at idle. If I have the hanging idle issue while driving the car will run on as if I'm at like 10-15% on the gas pedal and I clutch in the car will stay around 3000 ro 2400 RPM.
Some days the damn thing runs perfectly, other days it runs terrible. Last night it was running the worst it has ever run, constantly dying off the line (not because I'm stalling it), dying on the freeway but no hanging idle issue.
What I've done so far is cleaned the IAC which seemed to resolve the hanging idle issue for a while but it came back so I ended up replacing it with a brand new unit from Ford. This seemed to fix it completely until last week when it happened again after not happening for 2 months. I've also replaced the PCV valve and hose with new units Ford unit because the factory unit had 130,000 miles on it so it needed to be replaced anyways. Upon the advice of a mechanic, I replaced the FRPP with a new unit from Ford. None of these things seems as though they have made any performance difference. Replacing the IAC did help for a while and the car was running flawlessly in terms of the hanging idle issue but it never resolved the shudder at speed or the instant dying. I also recent put a new fuel filter in (from Ford also) as it was time for a new filter anyways.
The fuel pump did go out at 118,00 miles and I replaced it with a parts store brand because it was a Saturday after noon and Ford parts was long closed. I am questioning if the fuel pump itself is bad at this point and that was the next item on my list to look into but now with all these codes I'm not so sure.
I also have a quarter horse installed and it is in bypass mode. I'm considering pulling the quarter horse out as well to see if it resolves the issues.
Any help with this one would be appreciated.
P0460 Fuel Level Sensor Circuit Malfunction
P0112 Intake Air Temperature Circuit Low Input
P0113 Intake Air Temperature Circuit High Input
P0103 Mass or Volume Air Flow Circuit High Input
P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem
P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input
P0116 Engine Coolant Temperature Circuit Range/Performance Problem
P0117 Engine Coolant Temperature Circuit Low Input
P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control
P0190 Fuel Rail Pressure Sensor Circuit Malfunction
P0192 Fuel Rail Pressure Sensor Circuit Low Input
The issues I've been having with the car are that when I drive, occasionally the motor just dies and if I'm at a stop I can't just crank the starter to start again. I have to full key off and then key on again. Some times this happens to me on the freeway and I just clutch in, key off, key on and pop the clutch. The car starts humming again.
Another issue I've been having is that mostly at low RPMs in just about any gear, when I'm at a low throttle use liek 10% or so, the engine will shudder like its not getting gas. If I am in 6th and I down shift to 5th and it goes from say 1700 RPM to 2200 RPM then the motor typically runs fine at the higher RPM. Some times under hard acceleration I feel like there isn't enough fuel flowing at the higher RPM maybe 5800 and above but most of the time it is ok on the high end. From the 2500-5000 RPM range I don't recall ever having any issues.
The last issue I've had is a wierd hanging idle. The motor will some times, seemingly for no reason hang at either 3000, 2400 or 1200-1400 RPM. Also, the motor tends to sit at 1100 and then come down to 1000 and then come down again to 800. Some times it dips down to 600 and sits there and I am fairly sure once warm it shouldn't be going below 800-900 at idle. If I have the hanging idle issue while driving the car will run on as if I'm at like 10-15% on the gas pedal and I clutch in the car will stay around 3000 ro 2400 RPM.
Some days the damn thing runs perfectly, other days it runs terrible. Last night it was running the worst it has ever run, constantly dying off the line (not because I'm stalling it), dying on the freeway but no hanging idle issue.
What I've done so far is cleaned the IAC which seemed to resolve the hanging idle issue for a while but it came back so I ended up replacing it with a brand new unit from Ford. This seemed to fix it completely until last week when it happened again after not happening for 2 months. I've also replaced the PCV valve and hose with new units Ford unit because the factory unit had 130,000 miles on it so it needed to be replaced anyways. Upon the advice of a mechanic, I replaced the FRPP with a new unit from Ford. None of these things seems as though they have made any performance difference. Replacing the IAC did help for a while and the car was running flawlessly in terms of the hanging idle issue but it never resolved the shudder at speed or the instant dying. I also recent put a new fuel filter in (from Ford also) as it was time for a new filter anyways.
The fuel pump did go out at 118,00 miles and I replaced it with a parts store brand because it was a Saturday after noon and Ford parts was long closed. I am questioning if the fuel pump itself is bad at this point and that was the next item on my list to look into but now with all these codes I'm not so sure.
I also have a quarter horse installed and it is in bypass mode. I'm considering pulling the quarter horse out as well to see if it resolves the issues.
Any help with this one would be appreciated.
