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Have a 1987 Ranger 4x4 with the EFI Lima 2.3 and a 5 speed. Got it last summer because I was anticipating getting a job that might be a 60-100 mile round trip per day to work. That didn't happen until now and I am going to start driving about 110 miles per day starting Monday. My other truck is a 95 F 350 4x4 that gets 11mpg on a good day, so that is why I have the Ranger. When I got the Ranger last summer it had a miss that I was hoping was going to be fixed with a tune-up. Turned out to be low compression on one of the cylinders, so I tore it down and rebuilt the engine. Tinkered with it throughout the summer off and on, but never fixed the problems I am having with it. Just pulled the codes on it today and here is what I got. All of the code explainations are from Ford Fuel Injection.
KOEO Codes.
21 ECT out of self test range 0.3 to 3.7 volts.
22 MAP/BP sensor out of self test range.
24 ACT sensor out of self test range 0.3 to 3.7 volts.
31 PFE or EVP circuit below minimum voltage of 0.24 volts.
53 TPS circuit above maximum 4.5 volts.
CM Codes
22 MAP/BP sensor out of self test range.
The symptoms that it has is it runs real rich. At idle when standing around it it almost will burn your eyes it runs so rich. In the past couple of days driving it around I have put about fifty miles on it and have burned about five gallons of gas. It was starting real hard. I had to push the gas down about half way to get it to start when cold, but now it is starting a little better. It cranks a little, but it will start without touching the gas. When warm it fires right up. After it starts weather warm or cold it will idle rough and idle about 1200 rpm. When driving it it pulls hard when on the gas. At least as hard as a 2.3 will anyway. When idling through town if I let off the gas where there is no load on the engine it will miss and make the whole truck buck and shake. If I let off the gas all the way where there is load on it again it will stop doing it and if I step on it again it will stop doing it. It is very irritating to drive. Now, this thing seems to be having a hard time getting up to operating temperature. The temp gauge will barely get into the normal range on the gauge. I drove it about twelve miles today at about 30 degrees today and checked the rad hoses when I got home and the upper hose was warm, but not so hot I couldn't keep my hand on the hose. There was hardley any pressure in the rad either. I cracked the cap and it hissed a little and I could pull the cap off without loosing any coolant. I put a new thermostat in at the rebuild last summer, but these have been know to be bad at new. Guess I might change it just to be safe. I know that the ECT and the ACT function both rely on the engine being up to operating temperature which maybe could cause codes 21 and 24. I have already changed the TPS and the ACT. Checked the ECT and it checked good. Not sure how to check the MAP sensor. I did change the MAP for one on another truck here, but the condition of the one I put on it is unknown. I get no codes for an O2 sensor, but I have no idea what the condition it is in either. I am going to verify the timing and check for any vacuum leaks tomorrow. I hope I hit on everything and hope you guys can help me shed light on my problems.
Thanks,
Steve
KOEO Codes.
21 ECT out of self test range 0.3 to 3.7 volts.
22 MAP/BP sensor out of self test range.
24 ACT sensor out of self test range 0.3 to 3.7 volts.
31 PFE or EVP circuit below minimum voltage of 0.24 volts.
53 TPS circuit above maximum 4.5 volts.
CM Codes
22 MAP/BP sensor out of self test range.
The symptoms that it has is it runs real rich. At idle when standing around it it almost will burn your eyes it runs so rich. In the past couple of days driving it around I have put about fifty miles on it and have burned about five gallons of gas. It was starting real hard. I had to push the gas down about half way to get it to start when cold, but now it is starting a little better. It cranks a little, but it will start without touching the gas. When warm it fires right up. After it starts weather warm or cold it will idle rough and idle about 1200 rpm. When driving it it pulls hard when on the gas. At least as hard as a 2.3 will anyway. When idling through town if I let off the gas where there is no load on the engine it will miss and make the whole truck buck and shake. If I let off the gas all the way where there is load on it again it will stop doing it and if I step on it again it will stop doing it. It is very irritating to drive. Now, this thing seems to be having a hard time getting up to operating temperature. The temp gauge will barely get into the normal range on the gauge. I drove it about twelve miles today at about 30 degrees today and checked the rad hoses when I got home and the upper hose was warm, but not so hot I couldn't keep my hand on the hose. There was hardley any pressure in the rad either. I cracked the cap and it hissed a little and I could pull the cap off without loosing any coolant. I put a new thermostat in at the rebuild last summer, but these have been know to be bad at new. Guess I might change it just to be safe. I know that the ECT and the ACT function both rely on the engine being up to operating temperature which maybe could cause codes 21 and 24. I have already changed the TPS and the ACT. Checked the ECT and it checked good. Not sure how to check the MAP sensor. I did change the MAP for one on another truck here, but the condition of the one I put on it is unknown. I get no codes for an O2 sensor, but I have no idea what the condition it is in either. I am going to verify the timing and check for any vacuum leaks tomorrow. I hope I hit on everything and hope you guys can help me shed light on my problems.
Thanks,
Steve
