Hey guys, I have an 01 GT and The only mods I have under the hood are a BBK throttle body and a Roush Cold Air Intake. I also have a Terminator 6 Speed Tranny in the car. I am only being able to get about 120 miles in a full tank of gas. I am going to have to sell my dream car and get something better on gas if i cannot get decent gas mileage out of mine. if anyone can help me i’d appreciate it !!
Gas Mileage Problem in my 01 GT
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I have a Borla Exhaust Setup with an offroad x-pipe but the o2 sensors are still in place. I have been driving “for economy” shifting at about 2k rpm’s and it still gizzles through gas... I just found a code today (P0320) for the Ignition/Distributer Engine Speed Input Circuit.
wmburns
SN Certified Technician
+1 regarding IF the speedometer is accurate. The PCM uses the car's speed sensor signal for multiple purposes. The speedometer needs to be accurate.
If this were my car I would be very concerned about the stability of the cam and CKP sensor. What can "cause" an unstable CAM and/or CKP sensor signal?
Howto perform charging system voltage drop test
https://www.stangnet.com/mustang-fo...perform-charging-system-voltage-drop-test.56/
Having access to a high end ODB2 scanner capable of data logging could make short work of this problem. Need to know things like:
https://www.stangnet.com/mustang-forums/resources/forscan-odb2-scanner-w-elm327-usb.57/
>>From Ford service manual.
P0320 - Ignition Engine Speed Input Circuit Malfunction
The ignition engine speed sensor input signal to PCM is continuously monitored. The test fails when the signal indicates that two successive erratic profile ignition pickup (PIP) pulses have occurred
If this were my car I would be very concerned about the stability of the cam and CKP sensor. What can "cause" an unstable CAM and/or CKP sensor signal?
- a bad alternator diode (alternator problem).
- a loose CKP sensor
- A broken crank damper outer ring
- an improperly torqued crank damper bolt.
- underdrive pulleys.
- Engine ignition wiring problem. Check spark plugs and COP insulator boots.
Howto perform charging system voltage drop test
https://www.stangnet.com/mustang-fo...perform-charging-system-voltage-drop-test.56/
Having access to a high end ODB2 scanner capable of data logging could make short work of this problem. Need to know things like:
- Fuel pressure
- Long term fuel trim
- MAF flow
- Misfire data
https://www.stangnet.com/mustang-forums/resources/forscan-odb2-scanner-w-elm327-usb.57/
>>From Ford service manual.
P0320 - Ignition Engine Speed Input Circuit Malfunction
The ignition engine speed sensor input signal to PCM is continuously monitored. The test fails when the signal indicates that two successive erratic profile ignition pickup (PIP) pulses have occurred
- Loose wires/connectors.
- Arcing secondary ignition components (coil, wires and plugs)
- On board transmitter (2-way radio)
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