My ceFIRO

[VQ20DE]

finally my car infected with idle rpm dropping problem...

is your problem same as mine? my cefiro rpm will drop to below 500rpm sometimes engine dies when i shift to N to coast. but only happens when engine cold, after driving for sometime, it's ok.

 

[seizai]

is your problem same as mine? my cefiro rpm will drop to below 500rpm sometimes engine dies when i shift to N to coast. but only happens when engine cold, after driving for sometime, it's ok.

driving time ok, only during idle...

drop till almost engine stop

 

[weikee]

Mine happen after engine fully warm up, and drove for minimal 20mins. Think the engine bay heat may have heat up the AFM making it go crazy. The car feel sluggish, and RPM may drop when you try to accelerate from standstill.

---------- Post added at 01:05 AM ---------- 6 hour anti-bump limit - Previous post was at 01:04 AM ----------

AAC dirty may cause idling problem too.

 

[VQ20DE]

drop till almost engine stop

yes, rpm will keep dropping pass 500rpm, sometime it will rise back to 750/800rpm, sometimes engine stop.

i'm still in N, so have to restart on the move but lose power steering momentary :ahhhhh:

 

[seizai]

hose replaced and clean dust on rubber wall... so far happen once only.

 

[seizai]

now coming hard to start problem...

 

[VQ20DE]

hose replaced and clean dust on rubber wall... so far happen once only.

u mean u cleaned the hose of the AFM? may i know where is the AFM? i read somewhere that throttle position sensor may also be the cause of it, how true i'm not sure..

 

[weikee]

now coming hard to start problem...

Usually is the Battery problem, not enough juice to turn the starter.

 

[seizai]

is new unit, bought it last month.

it happen randomly

 

[IketaniX]

maybe you can check the battery connector whether is it loose?

 

[syzedey]

try fuel pump test

 

[seizai]

juz wan to double confirm..

is d engine check light on when key turn to on? :hmmmm:

http://img690.imageshack.us/img690/4833/hr3u.jpg

 

[4_throttle]

yes, it does and it should off when engine started.

 

[seizai]

I found that rpm drop happen only when aircond switch on, sensor problem?

 

[sb3]

Seizei, have you solve your idle problem? My turn of having the stupid idle problem , goes below 500rpm even when coasting ! Let me know pls as I don't want my mech to start changing all the car parts to identify my car idle problem. I suspect the following defects:-

1) cam sensor

2) afm

3) fuel pump

4) tps

Earlier today , I sprayed some water onto the cam sensor as it was leaking oil onto the crankpulley.

Any input would help...

 

[sb3]

Mine happen after engine fully warm up, and drove for minimal 20mins. Think the engine bay heat may have heat up the AFM making it go crazy. The car feel sluggish, and RPM may drop when you try to accelerate from standstill.

---------- Post added at 01:05 AM ---------- 6 hour anti-bump limit - Previous post was at 01:04 AM ----------

AAC dirty may cause idling problem too.

Weikee , did you chg the AAC and afm too?

 

[sb3]

My problem solved! Weikee was right ! It was the Airflow meter , after changing it the engine ran smoothly again. By the way the afm cost about rm200-00 Halfcut condition.

 

[seizai]

Seizei, have you solve your idle problem? My turn of having the stupid idle problem , goes below 500rpm even when coasting ! Let me know pls as I don't want my mech to start changing all the car parts to identify my car idle problem. I suspect the following defects:-

1) cam sensor

2) afm

3) fuel pump

4) tps

Earlier today , I sprayed some water onto the cam sensor as it was leaking oil onto the crankpulley.

Any input would help...

I replaced coolant sensor (engine light on hard to start) and second hand afm (new one thousand plus).

Dropping problem still exist but it dropped till 300~400 this time.

 

[sb3]

I replaced coolant sensor (engine light on hard to start) and second hand afm (new one thousand plus).

Dropping problem still exist but it dropped till 300~400 this time.

Did you try to clean the throttle body and aacv idle valve?

I've actually wasted rm200-00 bucks to replace the afm. I've cleaned the 'spoilt afm' and installed it to my a32 , walau eh, it runs like new !! Now I have 2 spare afms! Since I have the spare afm , I have delete the mash in the afm. Suppose to give more throttle response. Will take it for a spin by this weekend.

Fingers crossed.

 

[12savefuel]

Actually guys you shouldn't remove the wire mesh, apart from the obvious reason of stopping some rare large debris, its actually there for a more important reason. The reason is to have a laminar air flow through the hot wire sensor, this will allow a more precise and consistent air flowing reading. Laminar flow means a straight and non turbulent flow.
http://blog.nialbarker.com/wp-content/uploads/2010/03/laminar_turbulent_flow.gif