what is the correct 2.2L idle speed difference between Park and Drive (at full stop)

[fenixus]

question to gen4 distributorless camry design owners ONLY

as in topic, I cannot seem to find answer to this question anywhere, so thought maybe guys with properly running 2.2L camrys (automatic transmission, California emission specs car 2000 or 2001) could give the right answer based on own properly running cars.

per FSM 5s-fe specs (gen4) the idle speed in Park or Neutral should be 700+/-50, but it doesn't say when (normally) the same idle speed should be while car is in Driving gear and at full stop.

mine are currently** at:
a) 730ish rpm at hot* idle in Park
b) 660ish rpm at hot* idle in Drive gear (at full stop).
*by hot idle, I mean car is fully warmed up, e.g. after 30 mins highway driving or 1hr locally.
** all electrical accessories OFF, though I had parking lights on (headlights off)

what are yours at?
thanks.

I am mostly looking for numbers from 2.2L gen4.5 00-01 camry owners (or solara gen1 00-01) with California emission specs.
Federal specs might give a tad different numbers (DIFFERENT ECU, different fuel injectors and different upstream oxygen sensor), same about California specs gen4.0 camry (97-99) or solara gen1 '99 that had a 3rd IAC port with Air Assist tube to fuel injectors (California emission spec'ed 00-01 do not have it).

best if someone could read them off the OBD2 scanner.

[Mister_Perkins]

Mines about the same.. Maybe a little higher around 700RPM in gear at stop. (probably not a help, because my cars are federal and 3rd gen)

[fenixus]

no probs, thanks for input anyways

I'd like to see OBD2 numbers from some 2.2L 00-01 camry/solara (calif specs, A/T) ... that would allow me for a direct comparison with same on car electronics and intake in use.

Originally Posted by Mister_Perkins

Mines about the same.. Maybe a little higher around 700RPM in gear at stop. (probably not a help, because my cars are federal and 3rd gen)

[1steve]

Are you having a problem or just curious? I don't understand your concern.

[fenixus]

i'm simply asking a question

my concern is described in details in another 40 page long thread
basically I'd like to have comparison with same engine/intake/injectors/sensors/ecu/trans/emissions model, because establishing common average values helps me decide on finishing off or continuing the major tune up (trying to get the fuel trims as low as I can without tearing the engine apart).

the difference between idle speed in Park/Neutral (more mechanically controlled) and Drive gear (mostly computer controlled) may reveal minor vacuum leaks or confirm they are gone.

also since I no longer have the paint mark on the throttle adjustment screw after numerous adjustments over the years, it's hard for me to know where is the spot the ECU wants most.

Originally Posted by 1steve

Are you having a problem or just curious? I don't understand your concern.

[Pvt-Public]

I have a 1999 2.2 Ca. emissions car. With the OBD2 scanner, here's what I got. Coolant temp at 185F idle in park/neutral 720rpm in any other gear 695. I don't think there is a published spec for rpm difference in park vs drive.

[fenixus]

thanks man. that helps. however you have a '99 model with different ECU and Air Assist tube connecting the IAC to engine head... wondering if it changes the values significantly.

but essentially that's it, minimal (25rpm) difference in P/N vs D/R/etc.

In my case I get around 650-670rpm in driving gears, no matter where I set the Park idle (now at 750rpm, tried also 720-730 with not much luck either). I mean a little higher Park idle gives some minimal boost to other gears idle speed to, but it never brings me around 700 as computer adjusts it lower eventually.

I think IAC maybe playing tricks, maybe it's sticking. might want to unbolt it in Summer and clean thoroughly. spraying cleaner through the opening in TB gives me no more improvements on that.