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Hello, what engine is in this ranger a 3.0 or 4.0 SOHC or OHV motor? How many miles are on the engine? Are any warning lights on?Check engine light? Does it start up normally since you have an issue when cold?
Ok a lack of power can be an issue with a weak fuel pump.If the fuel filter hasn't been changed in awhile I would replace that first and see if it helps. A fuel pressure test would help tell if its a fuel pressure issue when the vehicle exhibits a lack of power. A diagnostic check for codes would alaso tell if its possibly storing any lean codes which could be an indication of possible low fuel pressure
P0171/P0174 would indicate both banks lean, this would be caused by an issue with a vacuum leak,mass airflow sensor or loss of fuel pressure
It Is possible, usually its more when they are hot and run for awhile they have issues, engine coolant temperature sensor can also be giving a false reading but it sounds more like its running low on fuel pressure. Drive the truck with a fuel gauge installed and if it drops, its a weak pumo
Just respond back to this question you started and I can assist you further. The question remains open until it is rated and you hit accept and I can follow up more if needed from there as well
Nope, long as you keep responding to the question from time to time it will remain open. I don't get paid for assisting you until you rate and hit accept
You are welcome,just respond back when you have more info
Hello do you need more help with this concern
Hello, what engine is in the ranger? No codes stored or check engine light on? Idles ok just no power? how many miles and any major repairs done prior to having this concern?
Ok so you have misfire codes for cylinders 1 & 5. When the engine was rebuilt, did it have a valve job done? Is it misfiring when it has a lack of power?
Ok i was asking about the valves because they had issues with the valve seats causing random misfire codes, if you clear these codes and they come back, something is going on with that which would need to be checked further.They also had issues with both the ignition coil and fuel injector flow. If you used an aftermarket thermostat that may be why the engine is running cooler, different temperature range thermostat. Hard to say what else would cause a cold issue. It should change from open to closed loop very quickyl,even before the engine is warmed up fully unless its the wrong thermostat but still it shouldnt have a lack of power.Id clear the misfire codes and see if they return first
Yes,too long, if the temp gauge is low, it should eventually set a P0128 code saying its taking too long for the engine to reach normal operating temperature, so if you didnt use a ford thermostat you may want to change it out and see if that helps.
Ford/Motorcraft part from dealer way to go.
Hello, does it feel like a misfire since it is saying it has a misfire on cylinder #1? What enigne is in the ranger and how many miles? Does the check engine light flash while driving an it acting up? Original plugs, wires, coil?
Ok when the engine was repaired did it have valve work done. No other codes key on engine off, key on engine ruuning? Does the P0301 code come back if cleared? Snapshot data looks normal
Does it run rough at idle when cold until it runs a few then clears up? Pulling memory codes is on test. Doing on demand tests Key On Engine Off and Key on engine running tests check everything now, memory codes are codes that set while driving.
Two common issues,besides valvework. With the P0351 code it can be an issue with a bad or weak coil, or an issue with the coild driver from the PCM to ground the coil to fire. The other issue is a fuel injector leaking down causing a misfire on cold startup or after sitting awhile and flooding a cylinder