Car was running perfectly then one day (after a super cold night) it started missing bad and idling so badly it will shut off at a stop sign. 30% loss of power. Still runs and drives but not well. Coughs and spits when it started but will even out some after idling a bit. Doesn't shut off idling in the driveway but it does when I drive it. I thought it in the beginning it was using a bit of antifreeze so maybe it was a bad head gasket. Sometimes it blows water out the back but sometimes not. Maybe condensation, but sometimes it does it when it's warmer and not when it's colder outside. Mystery.
I checked compression, 128 even in all cylinders and no bubbles in the radiator. Radiator pressure is normal.
I checked it for codes, and I got 51. This is a switch signal issue, but explanation doesn't help. "A/C signal on, IDL contact off, or shift position in R, D, 2 or 1 range; with check terminals T and E1 connected." I did the proper connection. No problems with A/C, it works. Shifting works, it starts only in N and P. That leaves idle contact. I assume that is TPS?
I checked it out, but I cannot find any instructions online that show the correct TPS. All instructions are for a 4 pin and mine is 3 pin. I can buy the correct one, by picking the one that looks like mine, yet there is another one that is commonly listed but it isn't the right one.
I get voltage to each outside terminal of 11.5 volts intermittently, as I turn the sensor. The center appears to be the source voltage and it switches from one terminal the other. Doesn't make sense to me because I opened it up and it is simply a switch from one side to the other.
Wide open throttle connects one terminal and closed connects the other, that's it. There is no Rheostat. There is no variable voltage in this TPS. I wish I could post a photo. It appears to work as designed, but not according to anything online. The other one they always show should have 5 volts source and vary down to .5 or so. Does anyone know anything about this?
I checked compression, 128 even in all cylinders and no bubbles in the radiator. Radiator pressure is normal.
I checked it for codes, and I got 51. This is a switch signal issue, but explanation doesn't help. "A/C signal on, IDL contact off, or shift position in R, D, 2 or 1 range; with check terminals T and E1 connected." I did the proper connection. No problems with A/C, it works. Shifting works, it starts only in N and P. That leaves idle contact. I assume that is TPS?
I checked it out, but I cannot find any instructions online that show the correct TPS. All instructions are for a 4 pin and mine is 3 pin. I can buy the correct one, by picking the one that looks like mine, yet there is another one that is commonly listed but it isn't the right one.
I get voltage to each outside terminal of 11.5 volts intermittently, as I turn the sensor. The center appears to be the source voltage and it switches from one terminal the other. Doesn't make sense to me because I opened it up and it is simply a switch from one side to the other.
Wide open throttle connects one terminal and closed connects the other, that's it. There is no Rheostat. There is no variable voltage in this TPS. I wish I could post a photo. It appears to work as designed, but not according to anything online. The other one they always show should have 5 volts source and vary down to .5 or so. Does anyone know anything about this?
Jan 22, 2023 at 4:00 PM
