TPS problem I think
#1
TPS problem I think
95 Ram with 318, 5 speed manual. Here's the problem. Truck runs great the first 10 miles or so. Then it starts to buck and jerk at particular throttle positions. When I stop, the idle surges and I have to give it a little gas to keep it from stalling.
Trouble codes it's throwing are 1.) oxygen sensor indicates a lean mixture, 2.) throttle position sensor voltage too high or too low, 3.) battery current to the PCM has been interuppted during the last 50 starts.
I put a new TPS on it today and the problem still persists. I've cleaned the throttle body and replaced the air filter. Oxygen sensor is a year old.
Any thoughts or suggestions will be sincerely appreciated. I'll even blast holes in the damn thing with a 12 guage if you think it'll help. Suggestions that I've received in the past from you all has been a big help. Thanks.
Trouble codes it's throwing are 1.) oxygen sensor indicates a lean mixture, 2.) throttle position sensor voltage too high or too low, 3.) battery current to the PCM has been interuppted during the last 50 starts.
I put a new TPS on it today and the problem still persists. I've cleaned the throttle body and replaced the air filter. Oxygen sensor is a year old.
Any thoughts or suggestions will be sincerely appreciated. I'll even blast holes in the damn thing with a 12 guage if you think it'll help. Suggestions that I've received in the past from you all has been a big help. Thanks.
#3
If the rig starts to buck after it has warmed up, you can probably rule out the fuel pump, TPS, IAC, MAP sensor, etc.
Here's what the PCM reads during warm-up (also called OPEN loop mode):
² Battery voltage
² Crankshaft position sensor
² Engine coolant temperature sensor
² Intake manifold air temperature sensor
² Manifold absolute pressure (MAP) sensor
² Throttle position sensor (TPS)
² Camshaft position sensor signal (in the distributor)
² Park/neutral switch (gear indicator signal—auto.
trans. only)
² Air conditioning select signal (if equipped)
² Air conditioning request signal (if equipped)
And after warm up (also called CLOSED Loop):
² Air conditioning select signal (if equipped)
² Air conditioning request signal (if equipped)
² Battery voltage
² Crankshaft position sensor
² Engine coolant temperature sensor
² Intake manifold air temperature sensor
² Manifold absolute pressure (MAP) sensor
² Throttle position sensor (TPS)
² Camshaft position sensor signal (in the distributor)
² Park/neutral switch (gear indicator signal—auto.
trans. only)
² Oxygen sensors
Notice the one thing that seems to be different? There's your most likely answer.
Here's what the PCM reads during warm-up (also called OPEN loop mode):
² Battery voltage
² Crankshaft position sensor
² Engine coolant temperature sensor
² Intake manifold air temperature sensor
² Manifold absolute pressure (MAP) sensor
² Throttle position sensor (TPS)
² Camshaft position sensor signal (in the distributor)
² Park/neutral switch (gear indicator signal—auto.
trans. only)
² Air conditioning select signal (if equipped)
² Air conditioning request signal (if equipped)
And after warm up (also called CLOSED Loop):
² Air conditioning select signal (if equipped)
² Air conditioning request signal (if equipped)
² Battery voltage
² Crankshaft position sensor
² Engine coolant temperature sensor
² Intake manifold air temperature sensor
² Manifold absolute pressure (MAP) sensor
² Throttle position sensor (TPS)
² Camshaft position sensor signal (in the distributor)
² Park/neutral switch (gear indicator signal—auto.
trans. only)
² Oxygen sensors
Notice the one thing that seems to be different? There's your most likely answer.