RX-7Havik

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.

trainwreck517

iTrader: (1)

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

sj_rx7nut

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 ?

RX-7Havik

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

HAILERS

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

sj_rx7nut

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 ?

importedrx7

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