help me with 4g91 DOCH

[syahizad]

I also face this issue before, few items u need to check :
1. ISC
2. TPS voltage reading
3. any vacuum leaking

I have solved my problem after re-setting on my TPS. And I had sent a mail to RPW regarding this issue, and what they reply is to check on ISC and TPS sensor functionality.

erm.. ISC? TPS? what that thing? can u tell me more.. sori still junior la

 

[boyzone]

ISC is the stepper motor which is to control and compensate air input to smoothness on idling speed, increase idling when air con is switch on..etc.
location below throttle body. with brown colour motor, test with ohm meter, u can get 30 ohm for each terminal. if come with black colour head ( like GTI/ Putral using ) u can get 40ohm at each terminal.

TPS is throttle position sensor, locate at infront of throttle body. check with voltmeter on pin 1 and 2, with normal idling speed, u can get it around 550mV to 950mV.
If not sure, better send to workshop for checking.
Good luck :D

 

[4g15p]

Guys,

Need ur expertise, I've upgraded my 4g91 by using 4g93 complete head but still using 91 cam & 91 rocker cover (head cover).. the problem is oil leaking (at spark plug seal & head cover).. is it because of the rubber seal, fyi I'm using original proton top set, or maybe head cover for 91 not compatible with 93 head.. my mech already twice reopen the cover but stil not solve...


any idea ?:cry_smile:

 

[boyzone]

91 engine cannot match with 93 head.

 

[4g15p]

ic... have u experienced it ?

 

[V8_nutter]

allo... ko dah tukar throttle body ke blom? klau blom try kalai EVO1/EVO2
punya. pastu piping 2'. Gearbox kasi rojak masuk adj cam pully + feul regulator SARD, pastu gi setting (ipoh aku tak tau tp kat shah alam aku tau) ... nzk lg laju tukar pisto. try buat semua tu mesti keta kau best giler (utk N/A).

Change throttle body evo1 or evo2, what milimeters is that ? Then gearbox rojak, what gearbox to use ? Please explain to me more about this.

 

[syahizad]

ISC is the stepper motor which is to control and compensate air input to smoothness on idling speed, increase idling when air con is switch on..etc.
location below throttle body. with brown colour motor, test with ohm meter, u can get 30 ohm for each terminal. if come with black colour head ( like GTI/ Putral using ) u can get 40ohm at each terminal.

TPS is throttle position sensor, locate at infront of throttle body. check with voltmeter on pin 1 and 2, with normal idling speed, u can get it around 550mV to 950mV.
If not sure, better send to workshop for checking.
Good luck :D

thanks.. the problem solved.
i find good mechanic. good one la... something wrong with meter sensor.. dont know.but its worked.