BB6SE

I have a 2003 Accord V6 Coupe 6spd and it won't idle!!!
Once I start it, it runs normally then once I touch the gas it will shut off.
I can drive/shift it normally as long as I don't let off the gas.

I had the shop replace my exhaust rocker on the rear head because they broke when I miss-shifted.

There's no engine check light.

What could be wrong guys?!?!?

Mr_ET

I would recommend a compression test to make sure the engine is healthy, other than that could it have anything to do with the drive by wire?

BB6SE

I've done a compression test and had a Honda tech reprogram the drive by wire as well.
Thanks.

Pleiadi79

air mass sensor, throttle body position sensor and slip contact of electric throttle body engine.
Ceck also if no cable damaged near ecu throttle body and gas pedal.
Are u data logging some ecu errors?

K24power07

Have u added anything new to the car before this probably started?, how long has this been going on?how long have u had the car and how many miles are on it?

BB6SE

I'll check those and if it is I'll paypal you 100bux.

I've had it for 3yrs now and its got 115,000km.
Nothing was added to it. The shop replaced the exhaust rocker.

Thanks guys.

K20DC2R

+1 on the air mass flow sensor! the one on the intake arm... paypal to..... j/k GL!

any MIL codes?

run the car then unpug the air mass sensor. the car should run rough and die after that..but if it doesnt and runs the same as you say it does then it can be a faulty air mass flow sensor.

KaBlookie

I was going to suggest the idle air control valve, but I wasn't sure if the newer Accords have them...just because this is exactly what happened to my engine when I removed/cleaned/re-installed my IACV.

Seems as though Pleiadi79 likely has the right answer though...hopefully!

Curiouz_G

aww i hate you.

thats the problem right there.

Pleiadi79

Man do not worry for $$$$ not necessary....

Big thanks however. Just remember to check engine posizion sensor water temp sensors.
If wtr temp sensors are faulty they can send a wrond data to ecu that will modify also ur air/fuel ratio.
u can also try to unplug the connector on electric engine motor. Car should switch off or boggin.
Remember to check the connecto under ur gas pedal by moving it. Listen at engine if something changes....

SiREJ8

Was valve lash set properly when the rockers were replaced?

BB6SE

Thanks guys I'm gonna try all of those things you mentioned.
Where's the IACV??

And the valves were set properly before started.

Pleiadi79

if i'm right should be near thbody

BB6SE

Is it the same as the IAT?

Aantczak

I would think it is directly related to throttle position or Idle air control. How is that you can move the car if it shuts down as soon as you touch the gas?

BB6SE

Sorry for not being clear.
If I start it then it'll run. But once I tap the gas it'll shut off.
but I can drive it if I keep my foot on the gas.

Aantczak

So just a quick tap on the pedal and it will shut off, but if you exceed that point it will come off of idle? I'm thinking for sure its a sensor related to throttle position or pedal postion.

Could it be a vacuum leak? They had to remove intake manifold and other items for access to the valve train so that may be an issue too.

esean93

if its a vacuum leak it would idle higher but it wouldnt shut off.can you rev the motor?it could be a bad ecu.find somebody with the same car who can let you borrow their ecu.

K20DC2R

EGR FTW !!!!!!!!!!!!!!

peep the EGR since your gunna be in there! i bet its clogged!


also check air flow out the pipe for a clogged cat...

Aantczak

I believe vacuum leaks can cause multiple issues that would include good idle and poor accelleration under load or poor idle and good accelleration under load. ??? You may be right that it isn't vacuum leak because it would have actual running issues, huh? That would point to position sensor of some sort. If it was EGR or clogged cat then the car wouldn't run very well at all.

Aantczak

The EGR would flag a code in the ECM wouldn't it?

sleepingciv

iTrader: (2)

you ever thought about changing your fuel filter or test your fuel pump to see if its weak?

BB6SE

yeah it'll just stumble then shut off.
but if I drive it and keep my foot on the gas it'll drive like normal. Power is normal too.
Doesn't feel slow or anything.

We've had the drive by wire system checked.
No vacuum leaks either from what we could see. I don't think it would shut off if there was though.

RareSpirits

any CEL?

BB6SE

No CEL