random drop in RPM at idle
- Thread starter Dizzy_ax
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last time i did the checked it only went up to 4.35ish?
I cleared the codes when i reset the TPS. the check engine light pops on from 10 seconds to about one minute. depending on if im just cruising highway speeds or driving around town. The digital meter im using goes up pretty smooth and back down smooth.
I cleared the codes when i reset the TPS. the check engine light pops on from 10 seconds to about one minute. depending on if im just cruising highway speeds or driving around town. The digital meter im using goes up pretty smooth and back down smooth.
You need to check it at every last bit of movement you can. It's a lot easier with an analog meter if you have one (it's easier to see the needle dip). I try to literally see every hundreth on a digital meter.
Did you ever get a TPS code for low voltage after you disconnected the TPS? If you did not, that indicates there's a wiring issue (short to VREF) or a bad TPS (the wiper is shorting to VREF). More testing is needed (if you want to get into this, we need to know how the 123 and other codes were generated [Memory codes, etc]).
Did you ever get a TPS code for low voltage after you disconnected the TPS? If you did not, that indicates there's a wiring issue (short to VREF) or a bad TPS (the wiper is shorting to VREF). More testing is needed (if you want to get into this, we need to know how the 123 and other codes were generated [Memory codes, etc]).
Time to close the thread, i finally figured this one out! I have BBK headers and i guess its common once you start getting into the high heat mods they crack around the collectors. So im getting cold air passed my O2 sensor and the car reacts according to the reading leaning and then dumping once it gets too hot. Just in case anyone else runs into this i do believe i bought the cheaper BBK shorties and the guy at the All ford proformence said he has seen this before. might be something to look into if you have had this problem (I replaced everything sensor wise because of this and it ends up being the header 
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Woops forgot to thank everyone in the thread with the ideas (This problem happened right after the S/C was installed. Also had tons of popping on deceleration (Sounded like a rally car which in turn got me a nice careless driving ticket 
) Long story but im passed all that now 
) Long story but im passed all that now Similar threads
