iamsuperbleeder

What's the normal idle speed a 2nd or 3rd gen (whatever 91 is ) pickup with the 22re should have in closed loop right after startup? Just curious because mines around 2,200rpms for about 3 er 4 minutes till the truck warms up a bit, which, to me, seems rather high. Once the truck warms up and goes into open loop, it idles fine just barely above 1,000rpms. I know it's not a sticking idle-up valve cuz I just replaced it; plus I can turn on my AC and it actually makes it idle even higher. Faulty cold-start valve maybe? It's very consistent; it does it every time I start the truck after it's sat for more than about 1 hour.

Edit: Just glanced at the Haynes manual... Do yall think the DP (dashpot) woud have anything to do with the problem, or would that be constant after warm-up too? Haven't really messed with it yet; to be honest I didn't know what in the world it was till now, lol.

thook

No, it wouldn't be the dashpot. That relates to throttle release/idle return.

You're idle is way too high....period. Have you tried adjusting the idle valve? Should be 800-850 in open loop.

jason191918

89-95 is 3rd gen (for pickups)

I believe the normal idle is 800 +/-50. When it's really cold, mine will idle that high...but I live in MI/WI....

http://personal.utulsa.edu/~nathan-buchanan/93fsm/

This is better than a Haynes...check it out.

iamsuperbleeder

Really? That low? I fiddled with it and brought it to a smooth idle that I though was adequately low enough, but I'll turn it down a bit tomorrow after my drive to work and note on where it idles afterwards; I have to turn down the idle up valve anyways, so I'll hit em both at the same time . Thanks, I'll let ya know how it works.

jason191918

I thought you cannot adjust the idle because it's all electronic.

thook

Fortunately, you can. There's a big, flat head screw on the side of your throttle body that is the air valve/idle speed adjust screw. You set that when the engine is operating temperature. But, because it is an EFI system, it can be affected by sensor input or adjusted by the ECU according to that.

iamsuperbleeder

Ok, so I tweaked the idle today after driving for a bit to get to full operating temp. I think my Autometer tach is off a bit, because anything that reads below 1,000 RPMs is a very rough idle. Right exactly on 1,000 RPMs (which I'm suspecting it really closer to 800 RPMs), it idles perfect when warm. After it sits for a bit, it starts and idles at about 1,750 at the most (according to my tach), which to be honest, I can live with. I think I just need a new tach, lol. I got this one dirt cheap from an auction, so a new one may be in order soon, because I also want to get a 4 gauge pod and get a volt meter, an oil pressure gauge, an air/fuel ratio gauge, and another temp gauge that's numbered instead of just reading between "C" and "H", lol.

84sr5yoty

Hot idle should be anywhere from 750-900 RPM's. Cold idle will vary depending on the temperature, but it shouldn't be much above 2000 RPM's.

It sounds like you got both cold and hot idle RPM's adjusted correctly.