88 GTU.......on initial start up it revs to about 3000 for about 10-15 secs then idles down to about 2000-1000 right afterwards and bounces up and down that range for about 2-5 minutes until finally leveling out at the 700 mark and idleing smoothly. What is causing that? Could a dirty BAC cause that initial up & down idle or is it a poor exhaust system? I love the car. First RX-7, I have done alot of minor exterior things to fix it. I have also put in a new clutch and put all new calipers and rotors on. Only thing I haven't done is my exhaust, still have all three cats on there and it's in pretty ragged condition. Any input would be great.

 

Tps out of adjustment, To skip 3000rpm warmup start it in gear.

 

I'm having the same problem with my '91, i'm starting with tne o2 sensor. then I'll try adjusting the TPS.

trainwreck, are the directions for that in section f1-36 of the FSM. Are there any better directions available ?

 

Thanks for the input fellas. I'll check both.

 

O2 sensors have nothing to do with idle or startup at all ever. Just a piece of FYI.

 

My '91 is stalling after it is warmed up and I come to a stop or put the clutch in. It doesn't hold idle at 750, it dies out then it is hard to start, like it is flooded. I wait 10-15 mins and then it starts right up.

Doesn't the o2 sensor determine fuel/air mixture ?

 

ok my car does simliar stuff but now i had it started it did the high low idle fr like 5 mins then you had to keep hitting the gas to keep it running now it wont start at all