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Discussion Starter #1 (Edited)
problem in holding idle with warning lights ..

my 01 Ody has around 72000 miles on it. It started fine this morning at first and I found out that I forgot to take out the trash can. So I parked the car, got out, got the trash can out and jumped on the car.

When I tried to start the engine with key at "on" position, I noticed some "weird" lights are turned on on the dash. They are "battery", "oil", and the one shows which doors are open (all five of them are on) also there's a light shows rear brake light.

The car would start but stall right after. I could hold the gas pedal and it will run.
What may go wrong? what do I need to look for?
 

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Discussion Starter #2
well..
after reading the manual, I found out all the lights are normal when the key at "on" position...

anyway, so far, the car starts up fine and can't idle.
I do have gas. the gas tank has some gas, rather low but the light isn't come on yet.
I do have power. the engine starts fine.
then what's the problem?
fuel pump?

HELP!!!!
 

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Discussion Starter #3
checked all fuses and all came out fine.
The car stalls right after I release the key from the "start" position.
Right after the engine starts, I could hold the gas pedal to either hold the engine at whatever RPM I want or rev it.

I don't even know what else to look for...:(
 

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Discussion Starter #4 (Edited)
well,
another update from myself..:D

with the information from http://www.tegger.com/hondafaq/startproblems.html#mainrelay,

I have checked the main relay, and it DOES have three clicks.
So i think it's not the problem.

I also found out that if it's a "cold" start(the car sits overnight or a day), the car DOES idle, but rough. If I turn it off, then it will crank, start and die right after the key is released from "III" position. But in some cases, it needs some gas to get it start.

Well, what's next? could it be EGR valve or IAC valve?
 

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Is the check engine light on? IAC valve circuit problems trigger code P1519.

Check the IDLE AIR CONTROL (IAC) VALVE.
 

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Discussion Starter #6
no.. the check engine light is not on. However, I am going to borrow a code reader from coworker to see if there's any code stored.
 

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Discussion Starter #7
update:

checked the IAC valve according to the repair manual and I can't get any voltage nor any connectivity.

Then the car threw P1519 code which is IAC valve circuit failure. I think it might be the problem.

I also unplugged the connector and start the car, the symptom is still the same, so I am assuming the IAC valve is the problem? Will a new IAC valve fix the problem?
I am going to give it a shot and see what happened.

Jason
 

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Check the IAC 3p Connector for voltage and corrosion. Pin 1 is ground, pin 2 is battery voltage, pin 3 is signal to pcm pin B23. P0505 is an IAC problem, P1519 is an IAC circuit problem. Troubleshoot the circuit first before replacing the IAC valve.
If there is no power to the middle (2) pin check the wire from it to the PGM-FI main relay. It may also be that relay. Diagnose the circuit before throwing parts.

PGM-FI relay is under dash above your left foot when driving. Check that something hasn't been kicked loose under there.
 

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Discussion Starter #9
rechecked the voltage and connectivity for pin 1 and 2. I do get the voltage from pin2 and pin1 is grounded. I am going to follow the honda repair manual to check the pin3 connectivity to PCM B23.
 

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Discussion Starter #10
took the throttle body and IAC valve last night. The IAC vlave is stuck and I am in the process of cleaning it up.

hope this will do the trick!
 

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The symptoms sounded like IAC. Hope the cleanup fixes the problem.
 

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Discussion Starter #12
The cleanup DOES fix the problem!!!!

The most time consuming part is taking out the residual throttle body gasket from the throttle body as well as the manifold.


Total cost:
throttle body gasket - $3.5
throttle body cleaner - $5.0
help from the forum and coworkers - priceless

didn't change the IAC valve gasket since the dealer around here doesn't have it in stock..the old one looks fine so I reused it.

Thanks!
 

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Before taking off the IAC and the throttle body did you try liberally spraying the cleaner? I am assuming you already tried that but your reply did not make it clear.
 
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