I've had it happen to me more than once and I fix the issue over 50 x what's going on if your fuel pump is going out it's not going out it's already out and once you replace your fuel pump and your fuel filter your car should be back to normal home skillet
SOURCE: need info on rough idel 5.9 cummins
bad injector?
easy to test with vom, just check from terminal on injector to ground if one reads different thats the problem, you do need to disconnect wire to check, my help is free and will be glad to help further just vote fixa..LOL my rating is all I care about. Hope yu can help me too.
SOURCE: is there a fuel reset switch on a 1998 plymouth
there is an ASD fuse=automatic shutdown relay,which will disable you van.
But you need to know if your missing spark at the plugs or fuel pressure at fuel rail
Testimonial: "thanks for the help. that solved my problem"
SOURCE: 2004 dodge 3500 cummins diesel sometimes hesitates then dies
My 2004 had the same issue and i replaced the transfer pump. It started right up and ran fine until the next morning i was driving it stalled. Now it won't start up not even with starting fluid.
SOURCE: have 1988 ramcharger 5.2 throttle body it starts
Start by checking to make sure that fuel delivery to the carburetor is good. The fuel pump might not be working well, or there could even be a problem with the fuel pickup tube in the gas tank.
SOURCE: P0121 and p0068 on a
P0121
The Throttle position sensor is a potentiometer that measures the amount of
throttle opening. As the throttle is opened, the reading (measured in volts)
goes up. The powertrain control module (PCM) supplies a 5 Volt reference signal
to the throttle position sensor (TPS) and usually a ground also. A general measurement
is: at idle = .5 Volts; full throttle = 4.5 Volts. If the PCM detects that the
throttle angle is greater or less than it should be for a specific RPM, it will
set this code.
Potential Symptoms
Symptoms of a P0121 trouble code could include:
Causes
A code P0121 may mean that one or more of the following has happened:
Possible Solutions
1. If you have access to a scan tool, see what the idle and WOT (wide open
throttle) readings are for the TPS. Check if they're close to the specifications
mentioned above. If not, then replace the TPS and re-check.
2. Check for an intermittent open or short in the TPS signal. To do that, you
can't use a scan tool. You'll need an oscilloscope. The reason is because scan
tools take samplings of many different readings over just one or two data lines
and can miss an intermittent drop out. Hook up your oscilloscope and watch the
signal. It should sweep up and down smoothly with no drop outs or spikes.
3. If no problems were noticed, perform a wiggle test. Do this by wiggling
the connector and harness while watching the pattern. Does it drop out? If so,
replace TPS and re-check.
4. If you have no TPS signal, check for 5 Volt reference at the connector.
If it's present, check the ground circuit for open or shorts.
5. Make sure the signal circuit isn't 12V. It should never have battery voltage.
If it does, trace circuit for short to voltage and repair.
6. Look for any water in the connector and replace TPS as necessary.
P0068
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of power
- Engine rough idle
Possible causes
- Large vacuum leak
- Leaking air duct system
- Mass Air Flow (MAF) poor electrcial connection
- Manifold Absolute Pressure (MAP) poor electrcial connection
- Faulty Mass Air Flow (MAF) sensor
- Faulty Manifold Absolute Pressure (MAP) sensor
- TP sensor not seated properly.
- Faulty Throttle Position (TP) sensor.
- Dirty throttle body
When is the code detected?
The
Powertrain Control Module (PCM) monitors operation rationality check by
comparing sensed throttle position to mass air flow readings
P0068 DODGE Description
The Powertrain Control Module (PCM)
monitors a vehicle operation rationality check by comparing Throttle
Position (TP) to Mass Air Flow (MAF) readings. If, during a self-test,
the comparison of the TP sensor and MAF sensor readings are not
consistent with the calibrated load values, the test fails and a
diagnostic trouble code is stored in continuous memory.
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