4G91 Gang..

[din]

morning fren..

 

[ayell]

Wah, so long i didnt post in this thread edi.. hows everybody doing??

missing you like hell hehehehehe

 

[ACQ2305]

Hahah,out of ideas already with what to do.. Maintain with what it is for now.. 91 engine..hehe..
Anyway,hello to all...

 

[tajulsans]

missing you like hell hehehehehe

Yeh rite, Hows your car bro? anything new? My car now didnt do much, my sister drive it more than me even. I drive wifeys car only. hahahaha.. that is until i manage to get a satria body laaa..

 

[sk8]

hello everyone!

i need help on my 91. i know im having problems with the a/f mixture as my spark plugs tell me so, and so as my tail pipe (very foul smell). i think by just minimizing the air in the mixture will solve the problem. but the problem really is, i do not know how to adjust the a/f!

can someone please direct me to the right knob to tweak. thanks in advance guys! more horse power to you!

 

[cik_yat]

hello everyone!

i need help on my 91. i know im having problems with the a/f mixture as my spark plugs tell me so, and so as my tail pipe (very foul smell). i think by just minimizing the air in the mixture will solve the problem. but the problem really is, i do not know how to adjust the a/f!

can someone please direct me to the right knob to tweak. thanks in advance guys! more horse power to you!

bro, using carb or inj?

 

[sk8]

bro, using carb or inj?

hi bro. im using the efi edition.

earlier this morning, i removed the air filter, tried to cover the MAP sensor (air passage) with my hand (basically, minimizing the entry of air) and tried to rev the engine and it responded very well. this makes me think that the problem really is the amount of air going in. or maybe this is a MAP sensor issue? what do you guys think?

thanks!

 

[calvin9683]

only proper way to check ur a/f is to put a wideband sensor at ur exhaust...
only proper wat to tune (increase/decrease) ur air fuel is by using piggyback or standalone...

 

[sk8]

only proper way to check ur a/f is to put a wideband sensor at ur exhaust...
only proper wat to tune (increase/decrease) ur air fuel is by using piggyback or standalone...

thanks calvin.

i will consider getting a SAFC and have it tuned. i think, after all the diagnostics and troubleshooting, this is the last thing i can do.

thanks guys!

 

[tajulsans]

thanks calvin.

i will consider getting a SAFC and have it tuned. i think, after all the diagnostics and troubleshooting, this is the last thing i can do.

thanks guys!

There might be something wrong with your car, but dont jump to conclusion so quickly. Getting an SAFC might not be the solution when there is something else wrong with it. How long have all this been going on, Did it only happen recently?

What i would check first
1. Go have an MUT scan, your ECU will store fault code if it detects anything unusual / malfunction.

2.If there is any unmetered air getting into your engine, such as a leak in the intake pipe, a vacuum hose disconnected which you didnt notice, etc.

3. Check if you have the correct MAF for your ECU, this is if you have ever changed it before. Then, check if it is in good functioning condition.

4. Check your spark plug, may want to have it changed & gapped properly. Also make sure its the correct heat range.

 

[sk8]

There might be something wrong with your car, but dont jump to conclusion so quickly. Getting an SAFC might not be the solution when there is something else wrong with it. How long have all this been going on, Did it only happen recently?

What i would check first
1. Go have an MUT scan, your ECU will store fault code if it detects anything unusual / malfunction.

2.If there is any unmetered air getting into your engine, such as a leak in the intake pipe, a vacuum hose disconnected which you didnt notice, etc.

3. Check if you have the correct MAF for your ECU, this is if you have ever changed it before. Then, check if it is in good functioning condition.

4. Check your spark plug, may want to have it changed & gapped properly. Also make sure its the correct heat range.

thanks for the reminders sir. but all of the above have been done already (except the MUT part as my harness does not include the OBD plug)

but, the problem have been corrected.

may i just share what happened and how i fixed the problem:

i have another friend who has the same engine. his is working properly.
first i borrowed his ECU and the problem persisted. faulty ECU ruled out
then i borrowed the whole throttle body, including the MAF, TPS, Servo, everything but the problem was still there

then i borrowed his hi tension wires and coil pack but the problem was still there!

when we analyzed it, the problem wasnt in the intake, was not electrical either... then i thought fuel pump!

come to think of it, the engine will really get too much air if less gasoline is being fed. so i changed the pump immediately and voila! got the quick response and power again!

im just sharing folks in case someone else experience this.

thanks for all the input guys!

 

[hAz]

hye guys,

it's been quite some time since i last posted here...
i got prob with my auto GB!
was driving last night, the road was uneven and i guess it hit the GB..
now oil leaking. just noticed this morning!

kindly need advice from sifu here whether can i just change the auto GB casing?
or what's the best solution? change to manual GB would cost how much nowadays eh?

*diy change my oil sump.. so happen got crack on it. about rm200 damage. lucky it was the oil sump. else i would have opt for manual! heh

 

[solu]

I've just convert my engine together to 4691 (halfcut). My meter lamp is not working, my break lamp is not working unless you press the break. My radio cannot on. My headlight (low light) would not work. My air-cond is working but not functioning 100& - there are functions that seems dont work.

Can you guys help?

 

[ACQ2305]

Better ask back the workshop that install your engine.. If all is properly connected, should not have much problems if the halfcut is in good condition..

 

[ayell]

Yuhuuu guys, how's your 4G91? Getting faster?

Long time not in here, want to show off a bit hehehhe :P

https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash3/577399_3752098116544_1099111193_3529628_2137796214_n.jpg

 

[Johnny_Tan]

Hi all sifu.. Anyone lettting go old saga 1.5 Manual gearbox?? coz mine sudah "kong".. HELP!!!... :wavey:

 

[joseph_lim75]

To all 4g91 sifu,

I have a 1997 wira and my year of 4g91 MT transplant is around 2003. Ever since till now, I have never went through a major service or changing timing belt. But so far my engine still running fine and smooth. I forgotten the mileage number when I do the transplant. Currently, my car FC with full tank can go up to 420KM, not sure this is consider high or low FC. In addition, I have quite a heavy wheel with a 60/65 inch profile front and back on a 15 inch rim.

My question is, if I need to do a major service, not overhaul, what are the things I need to change and check ? Also what are the rough cost estimate for each checklist ?

1. Starting what I know for sure is my timing belt. Saw in this same forum which is around RM410 include installation
2. ???
3. ???

Can any sifu shed me some light.

My current dashboard had changed to a CK dashboard, not the original 4g91 dash. Currently, my digital air cond temperature is not working. And I confirm is not the digital panel or its circuit problem, is something to do with the internal parts that comes with the blowers. Does anyone know where i can find a experience wiring guy who experts in this area ?

 

[ACQ2305]

To all 4g91 sifu,

I have a 1997 wira and my year of 4g91 MT transplant is around 2003. Ever since till now, I have never went through a major service or changing timing belt. But so far my engine still running fine and smooth. I forgotten the mileage number when I do the transplant. Currently, my car FC with full tank can go up to 420KM, not sure this is consider high or low FC. In addition, I have quite a heavy wheel with a 60/65 inch profile front and back on a 15 inch rim.

My question is, if I need to do a major service, not overhaul, what are the things I need to change and check ? Also what are the rough cost estimate for each checklist ?

1. Starting what I know for sure is my timing belt. Saw in this same forum which is around RM410 include installation
2. ???
3. ???

Can any sifu shed me some light.

My current dashboard had changed to a CK dashboard, not the original 4g91 dash. Currently, my digital air cond temperature is not working. And I confirm is not the digital panel or its circuit problem, is something to do with the internal parts that comes with the blowers. Does anyone know where i can find a experience wiring guy who experts in this area ?

Only can help you with the timing belt part, as i just changed mine last year, Gates, with installation rm200..Done by my mechanic. Got a good price for the timing belt though.. rm150.. And according to him, it is original..Oh well..will have it change once it has reached 70K mark..
If you have service ur engine on time, i dont see why a major overhaul is needed.. Maybe just valve lifters sevice, since it is a well known 4g9X issues with them..
Aircon, best leave it to the aircon shops..Im not that good in that area as well..hehe

 

[badguy]

hope can get help here

my engine when start run until rpm 2K will shack and lost of power(all the gear)

but while idling is OK no shacking at all

i had done the below check and repair but problem still there

1. engine mounting
2. spark plug
3. plug cable
4. air filter

now i suspect then pulley jam

is it possible the pulley jam will cause the engine shacking??

any JB workshop recommended for then error code checking and very familiar with 4G91 engine??

 

[syimirmazlan]

hi all forummers here...just wanna ask what is the standard injectors for 4g91..and what is the suitable size for upgrades such as full exhaust setup and high cam?