stuartporter
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- April 13, 2000
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For the last couple of months the check engine light has been coming on periodically, it will come on for varying lengths of time, i.e. seconds to minutes, I have also noticed on occasions that under heavy acceleration sometimes the engine hesitates, you ease up on the gas pedal a bit and it catches and progresses smoothly, there doesn’t seem to be a connection between this happening and the engine light coming on, although if the engine light comes on and you let the gas pedal up abit, to take some of the load of the engine, it usually goes off.
I bought a code scanner and pulled the codes, I got a code 33 followed by a long pause, another blink, another long pause and then code 33 again, according to the Haynes manual, the code indicates the EGR Value as being the culprit. Armed with this knowledge I took the car across to the local shop, and mentioned my findings, initially they had wanted to change the o2 sensors on the car, But they couldn’t determine which one was bad using their computer, I suspect that if an Explorer comes in with a ‘check engine light’ problem, that’s the usual practice!
Anyway turns out that his computer was actually fried by another car and couldn’t pull codes, so he pulled the codes using a screwdriver with a bulb inside, in a manner similar to using the volt meter, I watched him pull the codes and he got 3 codes, the first one being a 53 (Throttle Position Sensor) followed by a 86 and I forget the last one.
While looking at the car I noticed that there was a split in one of the tubes leading to the Differential Pressure Feedback Sensor (DPFE), (this was replaced but doesn’t seem to have made any difference).
I took the truck back home and pulled the codes again, I got code 33 twice (no 53)
What would be the symptoms of a deflective EGR valve or Throttle Position Sensor? And do they match the ones I have described above?
Can anybody recommend a good shop in the Scottsdale/Phoenix area?
Thanks in advance
I bought a code scanner and pulled the codes, I got a code 33 followed by a long pause, another blink, another long pause and then code 33 again, according to the Haynes manual, the code indicates the EGR Value as being the culprit. Armed with this knowledge I took the car across to the local shop, and mentioned my findings, initially they had wanted to change the o2 sensors on the car, But they couldn’t determine which one was bad using their computer, I suspect that if an Explorer comes in with a ‘check engine light’ problem, that’s the usual practice!
Anyway turns out that his computer was actually fried by another car and couldn’t pull codes, so he pulled the codes using a screwdriver with a bulb inside, in a manner similar to using the volt meter, I watched him pull the codes and he got 3 codes, the first one being a 53 (Throttle Position Sensor) followed by a 86 and I forget the last one.
While looking at the car I noticed that there was a split in one of the tubes leading to the Differential Pressure Feedback Sensor (DPFE), (this was replaced but doesn’t seem to have made any difference).
I took the truck back home and pulled the codes again, I got code 33 twice (no 53)
What would be the symptoms of a deflective EGR valve or Throttle Position Sensor? And do they match the ones I have described above?
Can anybody recommend a good shop in the Scottsdale/Phoenix area?
Thanks in advance