EGR, EVAP, PCV, ECT, 02's, TPS, IAT
#71
Senior Member
iTrader: (1)
my 02 f150 w/5.4 motor was in accident and the passenger front was smashed in good . ever since then if motor is cold and u drive it its fine after about 10 miles its starts to stumble and get real rough and lot of vibration when I come to a stop rough idle. so could it just be coincidence and just maybe a fuel filter problem. or ?
#73
EVAP System
I have a 97 f-150 4.2 liter that runs perfect when the fuel tank is toped off but when it drops down to about a 1/4 tank it will no longer idle when you first start it. What I have to do at this point to keep the engine running is manually advance the accelerator by pressing on the peddle. I can then operate the truck by keeping one foot on the accelerator while breaking with the other. Once the truck warms up it will then idle on its own but in a surging manner that oscillates between 700 and 400 RPMs it will continue this rhythmic fashion until it eventually dies.
Once you get to the gas station and fill it up, It will start right up and will idle perfectly.
Any Ideas as to what could be causing this? One other problem it is having relating to filling it up is that once the gas nozzle cuts off; the truck can still hold another 5 gallons. I don't know if that has anything to do with the 1st problem or not.
Any help would be greatly appreciated. There are no engine codes....
Once you get to the gas station and fill it up, It will start right up and will idle perfectly.
Any Ideas as to what could be causing this? One other problem it is having relating to filling it up is that once the gas nozzle cuts off; the truck can still hold another 5 gallons. I don't know if that has anything to do with the 1st problem or not.
Any help would be greatly appreciated. There are no engine codes....
#74
Senior Member
I have a 97 f-150 4.2 liter that runs perfect when the fuel tank is toped off but when it drops down to about a 1/4 tank it will no longer idle when you first start it. What I have to do at this point to keep the engine running is manually advance the accelerator by pressing on the peddle. I can then operate the truck by keeping one foot on the accelerator while breaking with the other. Once the truck warms up it will then idle on its own but in a surging manner that oscillates between 700 and 400 RPMs it will continue this rhythmic fashion until it eventually dies.
Once you get to the gas station and fill it up, It will start right up and will idle perfectly.
Any Ideas as to what could be causing this? One other problem it is having relating to filling it up is that once the gas nozzle cuts off; the truck can still hold another 5 gallons. I don't know if that has anything to do with the 1st problem or not.
Any help would be greatly appreciated. There are no engine codes....
Once you get to the gas station and fill it up, It will start right up and will idle perfectly.
Any Ideas as to what could be causing this? One other problem it is having relating to filling it up is that once the gas nozzle cuts off; the truck can still hold another 5 gallons. I don't know if that has anything to do with the 1st problem or not.
Any help would be greatly appreciated. There are no engine codes....
#75
pcv-heated vs nonheated
3) PCV (Positive Crankcase Ventilation system)
good info on the subject, but my question is about heated pcv. my truck has a heated pcv but the cost difference is astounding. $85 vs $4 for a non-heated pcv. can I use the non-heated pcv in place of a heated pcv without any loss of performance or possible damage to the engine. 5.4L
Last edited by 03heritage4x4; 11-15-2016 at 10:14 AM.
#76
Senior Member
Originally Posted by 03heritage[COLOR=seagreen
[/COLOR]good info on the subject, but my question is about heated pcv. my truck has a heated pcv but the cost difference is astounding. $85 vs $4 for a non-heated pcv. can I use the non-heated pcv in place of a heated pcv without any loss of performance or possible damage to the engine. 5.4L
#78
GREAT info!
Maybe you can help. I have a 1999 F150 V6. My temperature sensor, the one in the head, was replaced. Even with the new sensor my temperature gauge over time (20 minutes on the highway) will creep into the red, but the engine is NOT actually hot. It runs normal. The scanner reads 230 which I believe means an open circuit.
To compound this.....my Intake Temperature Sensor was giving off a -40 (open circuit) but would go away after a few miles. The sensor was replaced but I still have the problem with P113 code.
And...my gas guage is now acting strange.
I wondering if these point to a problem with the PCM?
Maybe you can help. I have a 1999 F150 V6. My temperature sensor, the one in the head, was replaced. Even with the new sensor my temperature gauge over time (20 minutes on the highway) will creep into the red, but the engine is NOT actually hot. It runs normal. The scanner reads 230 which I believe means an open circuit.
To compound this.....my Intake Temperature Sensor was giving off a -40 (open circuit) but would go away after a few miles. The sensor was replaced but I still have the problem with P113 code.
And...my gas guage is now acting strange.
I wondering if these point to a problem with the PCM?
#79
Senior Member
iTrader: (1)
#80
Senior Member
iTrader: (1)
GREAT info!
Maybe you can help. I have a 1999 F150 V6. My temperature sensor, the one in the head, was replaced. Even with the new sensor my temperature gauge over time (20 minutes on the highway) will creep into the red, but the engine is NOT actually hot. It runs normal. The scanner reads 230 which I believe means an open circuit.
To compound this.....my Intake Temperature Sensor was giving off a -40 (open circuit) but would go away after a few miles. The sensor was replaced but I still have the problem with P113 code.
And...my gas guage is now acting strange.
I wondering if these point to a problem with the PCM?
Maybe you can help. I have a 1999 F150 V6. My temperature sensor, the one in the head, was replaced. Even with the new sensor my temperature gauge over time (20 minutes on the highway) will creep into the red, but the engine is NOT actually hot. It runs normal. The scanner reads 230 which I believe means an open circuit.
To compound this.....my Intake Temperature Sensor was giving off a -40 (open circuit) but would go away after a few miles. The sensor was replaced but I still have the problem with P113 code.
And...my gas guage is now acting strange.
I wondering if these point to a problem with the PCM?