Won't hold idle, unless pressing gas pedal.
#1
Driver School Candidate
Thread Starter
Won't hold idle, unless pressing gas pedal.
I'm posting this more to help others that may encounter the same problem I've been banging my head with for the past few days. I'm preparing my 99 ES300 for a long drive from Texas to Michigan, so I've been spoiling her the last few days to make sure everything runs perfect. However, after I cleaned my idle air control valve, the car wouldn't start- which made me panic because I start my new job in Michigan next week... so it's kind of crucial that my car starts. Anyway, it would turn over just fine, and then just immediately die. Just would not hold idle at all, I cleaned IACV again, same results. I had kept it idling by pressing the gas pedal to see if it was a relearning issue, but as soon as I let go of the gas pedal- sure enough died again. Since engine was hot now, waited for it to cool down and pulled out both O2 sensors and cleaned them out (desperate at this point). STILL same thing.
So I take out the IAC one more time, and whatever side the little (cylinder/rotor/not sure proper name) is turned to, I turn it to the opposite side. I put it together and go to start the car and she's alive!! the IAC must have been stuck closed, so wouldnt let any air through to idle. But since it's not used if I'm pressing the gas, it was running fine. Granted, now it was stuck open, so the car was idling super high, like 1500-2000, but my baby is back in action, and I couldnt be more relieved. Ordered new IAC for around $120 off RockAuto- Airtex Part #2H1150
TL;DR- If car won't hold idle, your IACV may be stuck closed. Remove the two screws holding it in place, turn the little dial looking thing the other way and try to start car again.
So I take out the IAC one more time, and whatever side the little (cylinder/rotor/not sure proper name) is turned to, I turn it to the opposite side. I put it together and go to start the car and she's alive!! the IAC must have been stuck closed, so wouldnt let any air through to idle. But since it's not used if I'm pressing the gas, it was running fine. Granted, now it was stuck open, so the car was idling super high, like 1500-2000, but my baby is back in action, and I couldnt be more relieved. Ordered new IAC for around $120 off RockAuto- Airtex Part #2H1150
TL;DR- If car won't hold idle, your IACV may be stuck closed. Remove the two screws holding it in place, turn the little dial looking thing the other way and try to start car again.
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dbninc (03-21-20)
#3
Driver School Candidate
Thread Starter
Nope. Received the IACV this morning, replaced it and car started up with no problem.
IAC should feel springy as you turn it, if it moves whichever way you turn it, need to replace it.
IAC should feel springy as you turn it, if it moves whichever way you turn it, need to replace it.
#5
Lexus Champion
Congrats on getting the problem solved.
I like how you say you "just pulled the oxygen sensors out" and "remove two screws holding it" as if its that easy.....the Oxygen sensors are usually really rusted in there, and if there's a Philips screw that is worse than a Honda rotor screw, its those damn IACV screws!
I like how you say you "just pulled the oxygen sensors out" and "remove two screws holding it" as if its that easy.....the Oxygen sensors are usually really rusted in there, and if there's a Philips screw that is worse than a Honda rotor screw, its those damn IACV screws!
#6
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I'm posting this more to help others that may encounter the same problem I've been banging my head with for the past few days. I'm preparing my 99 ES300 for a long drive from Texas to Michigan, so I've been spoiling her the last few days to make sure everything runs perfect. However, after I cleaned my idle air control valve, the car wouldn't start- which made me panic because I start my new job in Michigan next week... so it's kind of crucial that my car starts. Anyway, it would turn over just fine, and then just immediately die. Just would not hold idle at all, I cleaned IACV again, same results. I had kept it idling by pressing the gas pedal to see if it was a relearning issue, but as soon as I let go of the gas pedal- sure enough died again. Since engine was hot now, waited for it to cool down and pulled out both O2 sensors and cleaned them out (desperate at this point). STILL same thing.
So I take out the IAC one more time, and whatever side the little (cylinder/rotor/not sure proper name) is turned to, I turn it to the opposite side. I put it together and go to start the car and she's alive!! the IAC must have been stuck closed, so wouldnt let any air through to idle. But since it's not used if I'm pressing the gas, it was running fine. Granted, now it was stuck open, so the car was idling super high, like 1500-2000, but my baby is back in action, and I couldnt be more relieved. Ordered new IAC for around $120 off RockAuto- Airtex Part #2H1150
TL;DR- If car won't hold idle, your IACV may be stuck closed. Remove the two screws holding it in place, turn the little dial looking thing the other way and try to start car again.
So I take out the IAC one more time, and whatever side the little (cylinder/rotor/not sure proper name) is turned to, I turn it to the opposite side. I put it together and go to start the car and she's alive!! the IAC must have been stuck closed, so wouldnt let any air through to idle. But since it's not used if I'm pressing the gas, it was running fine. Granted, now it was stuck open, so the car was idling super high, like 1500-2000, but my baby is back in action, and I couldnt be more relieved. Ordered new IAC for around $120 off RockAuto- Airtex Part #2H1150
TL;DR- If car won't hold idle, your IACV may be stuck closed. Remove the two screws holding it in place, turn the little dial looking thing the other way and try to start car again.
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