Intermittent Missing
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It's happened at pretty much any speed from a stop to 70. I've not mashed the throttle while it's doing it, but I have stepped down to try an accellerate out of it. It keeps missing until I lift off the gas and step down again. Then it's typically gone. It's definitely at part throttle but no idea if it happens at WOT. I can't even think of the last time I hit WOT.
Thanks for the ideas so far. It's giving me more to consider. O2 sensors is something I forgot about.
I'm not sure what the Gryphon can or can't monitor. I'm not one who plays with that too much. I do have autotap software/reader with their enhanced Ford package so I can read a ton of sensors. I'll have to give both a try.
Thanks for the ideas so far. It's giving me more to consider. O2 sensors is something I forgot about.
I'm not sure what the Gryphon can or can't monitor. I'm not one who plays with that too much. I do have autotap software/reader with their enhanced Ford package so I can read a ton of sensors. I'll have to give both a try.
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Well I change my O2 and no luck. The same problem is still happening except now auto zone's computer says that there is a misfire on random cylinders, instead of 3 and 4. Something I noticed after I changed the sensor, but I don't know if it was doing it before (probably was) but when idling the passenger side exhaust (remember I have true duals) is spilling raw, liquid gas, like i could put a jug under the exhaust and collect. I checked the oil and the oil also has a strong smell of gas. On top of it having a hard time starting, could the ever loving spark plugs be fouled? I mean I really can't afford to be chasing ghosts. I thought about taking and having a full diagnosis ran on it at a dealer or repair shop before I started in on the plugs....What do you guys think??
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From: Athens, TN
Well my dad is the GM at a Ford dealer, but he is about 5 hours away and he said it wasn't worth driving it that far and risking something worse happen. But he talked to some of the mechanics there and there is a TSB (Technical Service Bulletin, its a thing that Ford sends out when they see a trend on service issues) out on the fuel injectors. They are having a problem with them staying on constantly, even when you turn the engine off. I am going to gonna take it to my local dealer here to see what they find on their machine. And to answer your question I only changed the driver side O2 just after the cat. I am going to put my old one back on before I go to the dealer and if it is good I am just gonna try to take it back to auto zone.
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From: Athens, TN
I think I did hydrolock it, hopefully no damage was done. But yesterday I went to start it and it turned about a 1/4 turn and it stopped, like a dead battery. I turned it off and tried it again and it just clicked, again like a dead battery. So I let it sit a few minutes went out and it turned right over, didn't start but that is not uncommon with my list of problems going on. Like my post above about the TSB I think you are right about the injectors, gonna try to get it to the dealer this week.
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Joined: May 2010
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From: Athens, TN
just an update, got my truck back from the diag. scan, one bad injector is all that came back. will be putting the injector on myself tomorrow. i will let you guys know if it fixed it, and now to hope and pray a rod isn't bent.....
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From: Sunapee, NH
Definitely use the gryphon to scan the sensors and see what they do when it is and is not missing. I am no expert...just ideas I have based off what was going on with my car recently. I havent swapped my 02 sensors to see if thats my issue but from what I have been told and what its doing I think it might be it. When you at part throttle the truck is in closed loop mode and the ecu uses the o2 sensors to make quick adjustments to the fuel table thats in the tune (short trim fuel) and when your at WOT its in open loop and it uses only the fuel map that is in the tune. I'm sure there are lots of other things going on too while in CL vs OL but its something else to look at. You might even be able to monitor the o2 sensors voltage them selves.
The list below is all the Gryphon can read.
AFRP
Actual Fuel Rail Pressure Used to control the flow of fuel while an injector has been opened
AECON
Average Economy (MPG or L/100Km) This is an average of your fuel usage rate over a long period of time.
APP
Accelerator Pedal Position Percent pedal displacement
BAT
Battery Voltage With engine running, shows charging system voltage
COM GEAR
Visual gear indicator
CHT
Cylinder Head Temperature Degrees Fahrenheit / Celsius
ECT
Engine Coolant Temperature Degrees Fahrenheit / Celsius
EOT
Engine Oil Temperature Degrees Fahrenheit / Celsius (Note: Some vehicles do not display EOT)
IAT
Intake Air Temperature Degrees Fahrenheit / Celsius
IECON
Instant Economy (MPG or L/100Km) Fuel usage rate of your vehicle at that instant without averaging that value with past usage
LOAD
Engine Load % Percentage of total power available being used by the engine
LPD
Line Pressure Desired Transmission main line pressure
MAF
Mass Air Flow Measures the volume of air going into the engine
MAFV
Mass Air Flow Voltage A voltage representation of MAF (from sensor)
MPH / KPH
Miles Per Hour / Kilometers Per Hour
Dash display may be up to 3% higher than the digital display due to mechanical
differences in the spring, etc. used to control the gauge
OSS
Output Shaft Speed
Used with TSS to determine if transmission slip is occurring.
If OSS=TSS, no slip is occurring
RPM
Revolutions Per Minute Engine Speed
SPARK
Spark Advance Current timing advance/retard in degrees for the spark plugs
TFT
Transmission Fluid Temperature Degrees Fahrenheit / Celsius
TQC
Torque Control Amount of torque reduction to control traction
TSS
Turbine Shaft Speed
Used with OSS to determine if transmission slip is occurring.
If TSS = OSS, no slip is occurring
VCAM
Variable Cam Timing Number of degrees the cam is advanced/retarded in regard to crankshaft angle
Guess I'll dig out my laptop and run the autotap software/reader.
Last edited by svt2205; May 13, 2010 at 05:33 AM.
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yeah it should be able to read some more. When I called I asked them specifically about the fuel trim and he said it could and could read all the factory sensors...unless I miss-understood him. Maybe you need that other software your talking about....hope so...I plan to get one of those tuners soon because of what it can read as well as tune.
Last edited by NOLAGT; May 13, 2010 at 08:15 AM.
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From: Sunapee, NH
I don't think the Gryphon is as capable as someone wanted you to believe. I've read thru the manual and looked at every screen (or I think I did) and I see nothing. Oh well.
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I called PHP and that was the info the person told me. Seems it should...if it can read some it should be able to read them all but I dont have one. I have the aeroforce interceptor gauges for my mustang and reads a few more things than the list above.