i was wandering what the actual cold start idle RPM should be on a 92 short bed pickup 4x4 22RN????

 

22rn?


the idle should be dependent on what the temperature is. Like in January where I live, it got down to -60*F and my RPM was around 2600 until the engine warmed up, then it was at 800rpm.

 

whoa, and the "N" and "E" keys are not even remotely close to each other on a keyboard


usually yes, depends on tempurature, and maybe elevation too

 

i live in indiana and what it does is about 1000 on start then about 1500 then up to 2000 and then drops just like it went up. settles at 750. is there a problem or is that the way its supposed to be. i read somewhere that the manual 22re is designated 22rn is that wrong?????

 

hello were did everyone go??????

 

We're all cruising the forums trying to keep iamsuperbleeder from causing too much trouble.

I've never heard or even read of it being called the 22rn. I have seen it as a 22rec at the parts counter.

Your cold start will depend on temperature for the most part. Some of us have encountered an issue where the motor will idle high no matter what the temp is until it gets up to proper operating temp. Mine idles at 2200 even if it's 80 degrees outside.

 

I have never heard of a 22rn.... and (Junkers) 22rec is cali emissions 22re, hense the "c" at the end .

 

thats what mine does i think it was on the sticker under the hood that said 22rn

 

Didn't know that, thanks. The only ones they list at Napa are 22r, 22rec and 22ret. I knew what two of them were but had no idea what the C was for.

 

I might be able to help you figure this out but it won't be until this weekend. I'm pulling my Idle Air Control Valve and cleaning and will be trying to dial it back in to idle at 1500rpms cold. If it works I'll be posting here in the hopes that it'll help someone else.

 

HAHAHA, sig line

 

hey junkers let me know what you find out

 

Will do.

 

RN is the model / chassis type and designates a 22R series engine installed. If one was looking at the VIN plate, it's fairly easy to get confused with all the numbers and letters on it.

Cold start rpm's rpm depend on the engine / ambient temperature and the colder it is, the higher they should idle. It's controlled by the valve below the throttle body and should generally not be messed with. The valve is heated by coolant therefore when cold, the valve is open and as the coolant warms up the valvle slowly closes. It's sort of common for the valve to stick or have reduced range of movement, particularly on vehicles which haven't had regular coolant maintenance performed. And when that happens odd things can happen to the idle which become progressively difficult to troubleshoot after a few tune-ups. Since idle speed and timing are set with the engine warmed up, if that valve isn't working correctly you can end up with what is in effect an internal vacuum leak.

My two trucks- they typically come down to standard idle speed (~750) within a few minutes of starting. I can't say the actual rpms on the 91 since it has no tach, but at around 40F my 4Runner idles up to about 1300 when cold and slowly drops as the engine temp rises and is usually at 750 when the temp gauge is starting to show movement.

 

-60* holly $@%!. it got down to 10* here this winter. I like to froze to death!

 

Yeah, but how did your truck run?

 

Well, the starter likes to hang up a little when its cold out, but other than that it runs pretty darn good. I think with a ohmeter and some patients you will figure out yours too. Good luck.