Currently have no iacv with 00vi car was running at 650 to 700 rpm until recently. I changed the fuel filter, maf, tps. And put on a come filter. Deleted collector box on intake and blocked off related vacuum lines. After that. Car began running at 900 to 1000 rpm. Checked fuel trim and it's still pulling fuel as expected with 00vi injectors. I get surges at various speeds and when I wot rolling in 1st it doesn't spin tires as it once did. As you can read I've changed everything that could be the issue in terms of air car was running fine (650 to 700 and pulling strong) until I changed said parts any ideas? I'm thinking maybe injectors or fuel pump? But the car would be dumping fuel when reading the trim if that was the case? Maybe uncalebrated tps as I just threw it on when I changed it. Like a jackass. Please help

 

ECU is pissed there's no IACV signal.

 

could this really be the probable. Is there a way to run the plug without the iacv I don't want to put that big was box in again. And would this be the reason for it's sluggishness at low rpm

 

anybody ???

 

i also have a small blue valve. i was told it is an iacv but looks more like a 99 evap purge valve
tried it as an iacv by breaking the pink plug housing and forcing it in. i think it worked but would die at idle after about 25 minutes

 

...what are you doing bud? Put the socket wrench down and think for a min.

Why would you break your plug to fit another device with totally different job? This isnt play-doh or Lego's. This is a machine designed to specific things with specific parts.

That blue valve IS probably a 99 Evap valve that sits on top of a 99 manifold. The ECU isn't just going to negotiate with whatever you plug into it.

No there is no other way. You're ECU is LOOKING for a functioning Idle air control valve. It's what manages your idle, its what keeps your car idling, by reading information sent from the IACV.

 

^^^^ +1

 

Since you've changed your tps sensor, you have to reset the idle memory for the car. To do this you warm up the car and then turn the car off. Then turn the key to the on position with engine off for 5 seconds, then turn the key to off for 10 seconds. Then do the same thing over two to 16 times. It should work after the second time. Try this and report back.

 

the ecu has to essentially "re-learn" the new part, so it needs you to set the idle so it''ll go back to running normally.

 

i knew it was an evap for the 99. somebody insisted it wasnt. i guess becuase it resembles the 5.5 idle speed control. i didnt have it in for long and i guess this is what i deserve for listening to someone who doesnt know **** apparently. will do the procedure stated. im also going to take everything off and reseal everything to make sure there arnt any leaks. was planning on doing it today but.... snow so tomorrow i will reseal and then follow the relearn instructions. thanks. and yeah it was pretty dumb to put the evap in iacv. ive definitely learned my lesson on taken advice from certain people

 

I've tried the reset. Still idles at 900 to 1000 I have also realized from reading my scanner that ignition advance is at 5 degrees at idle and reads 1 degree when car is off is this normal. Or does it mean that there is an issue with timing

 

Some suggestions:
1. Put stock IACV, get an adapter if 00vi
2. Check Vacuum leaks/cracks
3. Did you mess with throttle body screw? (you shouldn't)
4. Leaks between Upper manifold and lower manifold gasket

 

I gotta be honest ... and I realize that everyone can certainly do what they want when they want, but I'm always a bit taken aback when I read threads about drivability complaints but then read that those same folks have made notable modifications and made notable changes to OE systems.

My advice to the OP is to take everything back to the OE configuration and start over.

 

if it is stable at that RPM, sit back relax and leave it.I have had a 900 RPM on my maxima's i dont see it as a problem. If it is stable.

Look at the high idle in my pic below

 

no countee when at above wot, because race car ( old school pic at max meet in lancaster )