Page 1 of 2

Hoping you can tell me

Posted: Fri May 09, 2008 12:40 am
by djbust
sometimes when driving hard and going to mivec it feels like it isn’t working and losing power plus noises are happening from the engine bay at the same time please help

Posted: Fri May 09, 2008 8:14 am
by dstocks
Is this soon after youve started the car. If so, that will be the computer retarding the engine because the car hasnt warmed up properly

Posted: Fri May 09, 2008 11:14 am
by djbust
no the car is already warm

Posted: Fri May 09, 2008 11:28 am
by dstocks
What sort of noises

Posted: Fri May 09, 2008 11:44 am
by djbust
its really hard to explain like a clunking noise sorry not great detail noises are so hard to explain

Posted: Fri May 09, 2008 12:40 pm
by I8A4RE
There could be a problem with the alternator thats causing mivec to be not working but that doesnt explain the clunking noises

Posted: Fri May 09, 2008 1:16 pm
by djbust
its like when it trys to hit mivec it cant but it still trys to would that make some sort of noise. Oh and sorry to sound like a noob but why does mivec not work when the alternator is playing up?

Posted: Fri May 09, 2008 1:29 pm
by I8A4RE
not really sure, someone else may be able to help you out there. all i know is the mivec alterntor has four pins so compare to the gr withs with 2. Im thinking that when the car hits mivec it could send a surge of power to something (or everything). So if the ecu recognises that there is a problem with alternator it stops allowing mivec to come on. Now i could be completly off i dont know, just kinda of thought it while i was writting lol

Posted: Fri May 09, 2008 1:29 pm
by dstocks
Think its to do with the current draw. The alternator for a mivec certainly has something in there for it, because people that have put in GR alternators by mistake, dont get mivec

Posted: Fri May 09, 2008 1:43 pm
by djbust
well alternator was charging at 14.2 to 14.5 and how exactly does the 4 pin alternator work with the mivec

Posted: Fri May 09, 2008 2:47 pm
by I8A4RE
Not sure but the question has been asked a lot but no one seems to know

Posted: Fri May 09, 2008 2:55 pm
by manofwood
it only does it when you go 'hard' to 5500 rpm +?
If you take it easy getting to mivec does it 'engage'?
does it just make a sound, and then return to the low range cams despite being over 5500rpm when you go hard at it?

Posted: Fri May 09, 2008 9:31 pm
by Bennoz
The mivec alternator has 4 pins as it has a secondary output. The oil valve actuation that put the pins into the second rocker arms requires a pretty heavy power hit - hence the extra output.

Posted: Fri May 09, 2008 11:23 pm
by I8A4RE
^^^^^^^^ yeah what he said 8O :lol: I was close.......not

Re: Hoping you can tell me

Posted: Sat May 10, 2008 12:05 am
by mr-charisma
djbust wrote:sometimes when driving hard and going to mivec it feels like it isn’t working and losing power plus noises are happening from the engine bay at the same time please help
have you checked your ECU Error codes yet?

Posted: Sat May 10, 2008 12:09 am
by mr-charisma

Posted: Sat May 10, 2008 1:23 am
by djbust
manofwood wrote:it only does it when you go 'hard' to 5500 rpm +?
If you take it easy getting to mivec does it 'engage'?
does it just make a sound, and then return to the low range cams despite being over 5500rpm when you go hard at it?
yeah its when going full throttle over 5500 rmp + mivec will sometimes engage and sometimes doesnt
and when it makes the noise it a continues noise and not engaging mivec then i release the throttle because i dont want to break anything
dont know about taking it easy to mivec because when i use mivec i am driving the car hard

Posted: Sat May 10, 2008 1:25 pm
by djbust
ok went to get ecu codes out and we followed the website http://www.ftowa.com/html/workshop/workshopart07.html shorted pin 1 to earth to recover the codes [engine managment flashed constantly but the abs light was doing the blink code] it gave me a code 13 [ inlet air temperature ] is it right that the abs light gives out the codes ? do you think that this would cause my problems that i am having?

Posted: Sat May 10, 2008 4:04 pm
by Bennoz
Do you get a nasty shudder thru the pedal when it happens?

Posted: Sat May 10, 2008 4:43 pm
by mr-charisma
djbust wrote:ok went to get ecu codes out and we followed the website http://www.ftowa.com/html/workshop/workshopart07.html shorted pin 1 to earth to recover the codes [engine managment flashed constantly but the abs light was doing the blink code] it gave me a code 13 [ inlet air temperature ] is it right that the abs light gives out the codes ? do you think that this would cause my problems that i am having?
Hmm... Where is the Air temperature sensor in a GPX? Does it have one? (wheres CAPS when you need it! :roll: )