thanks everyone for the great ideas on this idle problem.
so I started with the simple crap... changed the throttle sensor, changed the air idle control, cleaned the mass airflow.... nothing seemed to work. then I noticed that when I turned off the car I heard a hiss.. changed the (EGR exhaust gas valve ) and it helped a lot but still kept dyeing while in park...... so I looked and saw a small rubber air hose next to the( ) was split so changed that and while I was changing that I felt my hand get sucked up.... WELL GUESS WHAT!!!!!!!!!!!!! turn out the people who installed my supercharger seemingly forgot to put a seal on this valve in the picture, the main connection to the ( EGR exhaust gas valve ).... sure enough big vacuum leak.... so created a seal for it, weird shape, 1.5" circle with 3 bolts in a triangle shape and the hole in the middle. so after breaking my hand top fit fingers in that tight space.... I finished.... closed my eyes.... turned the car on and BOOM GOES THE DYNOMITE!!!!!!!!!! idle was at 800, park was great no spikes... drove it for a few miles to warm it up.. checked the seal and it seems like its all gone ..... last time im taking it to a mechanic.....
so thanks for all the help and ideas. woow.
Im having the same issue.... thks for this thread. Hopefully fixes it.
face the mirror
just to add a note to this too, on most cars you can elongate
the holes holding on the TPS sensor or slot them, then you can
actually adjust the sensor for better throttle response, and sometimes
idle too. Youll need a simple eletrical meter with probes like a Fluke
or something to do it, but its an old trick we did on Fox body Mustangs
back in the 80s and 90s. The sensor tells the ECU when the throttle
plate is open and closed and how far its open by voltage, usually a
range of 1.0 to 5 Volts. So we could slot the sensor and adjust it so
it read .98 or .99 at idle, so the throttle response was improved
off idle . If the voltage is anything over 1.0 at idle, the idle would
be higher then normal, which you want to get away from.
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Its getting worse... pretty bummed. Car runs so good past this. Im driving and the car idle jumps to 1.5k-1.8k pulling the car. Lame. Happens with no consistency, quite randomly