Hunting Idle

eezuan · Posted: Mon Apr 06, 2009 8:12 am Post subject: Re: Hunting Idle

Ok, change the box to 525,afm 525, and icv 525 already..
the results, the engine sound like racing cam.. from 650rpm up to 1100k rpm,
then, the mech sets the afm and tps, the rpm went to 650k and stable... but the response happen like last time, lagging for 1-2 seconds.. push the paddle, the car didnt go, after a while oni it responsed. no power and no torque at 4k - 5.5k rpm. very lean.. no power at all..
my current 520 box is better, power full.. but only the idle is quite high..
if the car moves, and i put on the free gear, rpm went to 1200k ,and when the car stops, it went to 950k rpm...
adus!! memang minyak terasa kuat....

highwaystar · Posted: Mon Apr 06, 2009 8:58 am Post subject: Re: Hunting Idle

bro before you do this, did you diagnose computer check? if yes what error stated?

eezuan · Posted: Mon Apr 06, 2009 9:07 am Post subject: Re: Hunting Idle

No, i didnt, where can i do the diagnose and to get error code?(the place)

highwaystar · Posted: Mon Apr 06, 2009 9:09 am Post subject: Re: Hunting Idle

eezuan wrote:

No, i didnt, where can i do the diagnose and to get error code?(the place)

any bmw specialist ada benda nih.... yu can also try optimum

lionel · Top Poster Joined: Aug 20, 2006 Posts: 441

eezuan wrote:

first of all would like to thank you and really appreciate to all of you guys for giving opinions.

ok, i will tell what i have already done for the engine. The story will be quite long... hehe..

1. the original engine was 520 manual 12 valve(rpm was 950k)
2. change the 525 engine (only head and block)(same rpm 950k)
3.change 525 afm,throtle body,injectors(still rpm 950k)
4.change all new hoses.(still rpm 950k)
5.change computer box 525.(rpm 600 but the throtle responsed was delayed badly, when push accelerator, the engine lag for few seconds the only it responsed even tho after tuned afm,tps and throtle screw. the fuel consumption was good using 525 comp box. but the driving was sucks!and no power)
6.so, i change back the 520 comp box. everything was fine, only the rpm is higher than normal and fuel consumption very bad. full tank oni can go up to 250km- 270km! )there was one time i had the perfect tune which the rpm was 650k(i dunno suddenly like that for two months after that back to 950k rpm).... during that time my car can go up to 600km full tank.
7. lastly,changed fuel regulator.still the same Sad

actually u did the right thing cos u need to change all parts to 525 spec when u do d conversion ......But i found out u left something there ...have u change ur fuel injectors to 525 one ??

525 cant run on 520 ECU ......ur mapping will be no be tune properly .....

eezuan · Posted: Tue Apr 07, 2009 6:10 am Post subject: Re: Hunting Idle

yeap lionel, ive change the throtle body as well as intake manifold and injectors 2.5..

chriseunos · Official Member Joined: Oct 31, 2007 Posts: 1081

how about o2 sensor?

evilnickwong · Posted: Tue Apr 07, 2009 9:59 am Post subject: Re: Hunting Idle

O2 sensor is chris' best friend. Laughing

eezuan · Posted: Wed Apr 08, 2009 12:13 pm Post subject: Re: Hunting Idle

o2 sensors also has changed. no different.:(after change o2 sensor the fuel consumption a bit lower, but the rpm still at that 950k ...

eezuan · Posted: Tue Apr 14, 2009 2:01 am Post subject: Re: Hunting Idle

Still not solve.. but my fuel consumption much better,,
but it because of leaking at the fuel pump round rubber sealed.
but my rpm still like that..

eezuan · Posted: Wed May 27, 2009 3:21 am Post subject: Re: Hunting Idle

ok guys... i have already solved my prob!!!!
it was the relay in the fuse box.
i took out two relays which related to air cond.
compared to most of m20 engine for e34's, they are not using the relays.
so... after took out the relays, my rpm went to 600 already..
and.,.. my fuel consumption much much more lower!!! yahoo!!!! very happy already!!!!! yeahhaaa..!!!!!

highwaystar · Posted: Wed May 27, 2009 3:33 am Post subject: Re: Hunting Idle

eezuan wrote:

ok guys... i have already solved my prob!!!!
it was the relay in the fuse box.
i took out two relays which related to air cond.
compared to most of m20 engine for e34's, they are not using the relays.
so... after took out the relays, my rpm went to 600 already..
and.,.. my fuel consumption much much more lower!!! yahoo!!!! very happy already!!!!! yeahhaaa..!!!!!

woaaahhh... so aircond not working?
btw CONGRATS BRO thanks for sharing.

eezuan · Posted: Wed May 27, 2009 3:02 pm Post subject: Re: Hunting Idle

my air cond working fine... everything is fine now! perfecto!!! Smile