Proton Wira 4G93 Jerking Problem

CharmCheeBye

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CharmCheeBye

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Hello to all forumers... Im a newbie in here and i need some help

I own a proton wira 1996 1.6cc
Last 3 week my car got problem and need to overhaul so the mechanic suggest me upgrade to 4g93 sohc... just need to change block & head..others can use back the old stuff from old engine..

About 2 week i use this car, its really nice n much more powerful compare to original engine 4g92p.. fuel consumption is great. my long run test is from Kepong > Mersing using Lekas>Kuala Pilah>Jempol>Serting>Keratong>Kuala Rompin>Mersing which about 400km and cost me RM65... For Me the fuel consumption is good

On the way back home from mersing the problem occur... My car started to jerk whenever i tried to gain more power during overtake / cruise.

I already change those things but still the problem occur :-

1- distributor
2- spark plug
3- spark plug cable
4- petrol filter

Can anyone give me a help on whats going on with my car

Thanks
 

vr2turbo

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vr2turbo

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Hello to all forumers... Im a newbie in here and i need some help

I own a proton wira 1996 1.6cc
Last 3 week my car got problem and need to overhaul so the mechanic suggest me upgrade to 4g93 sohc... just need to change block & head..others can use back the old stuff from old engine..

About 2 week i use this car, its really nice n much more powerful compare to original engine 4g92p.. fuel consumption is great. my long run test is from Kepong > Mersing using Lekas>Kuala Pilah>Jempol>Serting>Keratong>Kuala Rompin>Mersing which about 400km and cost me RM65... For Me the fuel consumption is good

On the way back home from mersing the problem occur... My car started to jerk whenever i tried to gain more power during overtake / cruise.

I already change those things but still the problem occur :-

1- distributor
2- spark plug
3- spark plug cable
4- petrol filter

Can anyone give me a help on whats going on with my car

Thanks
You mentioned you have already changed 1 to 4, means when doing the overhaul?
Spark plug problem can get that problem. Low revs no problem, high revs misfire, but can be other things also...

For outstation run, RM65 for 400km is not really that good. Roughly 12.9km/l, some mention their cars can do 12km/l in town.....:hmmmm:
 

CharmCheeBye

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CharmCheeBye

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1-4 item been changed after the jerking problem exists... change those things 3 days ago...

any other factors?

** regarding fuel consumption, satisfies with it coz only about 50km highway ( LEKAS ) other than that is Jalan Kampung with lots of car and jammed
 
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stupidcar

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stupidcar

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You mentioned you have already changed 1 to 4, means when doing the overhaul?
Spark plug problem can get that problem. Low revs no problem, high revs misfire, but can be other things also...

For outstation run, RM65 for 400km is not really that good. Roughly 12.9km/l, some mention their cars can do 12km/l in town.....:hmmmm:
My Persona Auto RM77 for 350-400 town driving. lol
 

gunnerzz

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gunnerzz

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the distributor is replaced with a used one or recon?
i am guessing recon part.
me personally i will go for used part than recon.

it was ok after the overhaul and the swap but only happen recently...
my guess;
1.improper connection within the ignition system.
2.fuel pump

a loose battery terminal will cause jerking too.
 

CharmCheeBye

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CharmCheeBye

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distributor : half cut condition...

1 : improper conection : mind to elaborate ?
2 : fuel pump : fuel pump may coz jerking too?

As i said above : original car is wira 1.6 4g92p... i transplant to 4g93 by using engine lantai ( head n block )... other use back 4g92p item... is there anything wrong with this? coz most of workshop said 4g92p > 4g93 sohc doesnt need change wiring ecu etc... only swap and change timing belt set

---------- Post added at 07:39 PM ---------- 6 hour anti-bump limit - Previous post was at 07:27 PM ----------

Which part?
 

vr2turbo

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vr2turbo

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If fuel pump, mentioned by bro. gunnerzz probably pressure not strong enough as you mention only jerk when at higher end when need more fuel...could be possible....
 

vr2turbo

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vr2turbo

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is there anything wrong with my installation?

4g92p > 4g93sohc... engine lantai ( head + blok )... others use back original item
Maybe fuel feed in not enough as 4G92P is 1.6 and 4G93 is 1.8, and you are using back everything to run a 1.6....
 

CharmCheeBye

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Problem Solved...The Distributor i bought from Hafkat Shop IS Already "Kapuk"

Foreman replace it with a new distributor and it solved the jerking problem

*** Additional Question : Can suggest me a suitable performance spark plug... iridium or platinum... how good it is... currently im using aerospeed cable plug...thanks
 

vr2turbo

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vr2turbo

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To me spark plugs don't improve performance. Iridium and platinum are just more lasting....
 

vr2turbo

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vr2turbo

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owh really? so the diff beetween normal n those iridium is just the lifespan? and interm of performance the diff is very minimal?
Well, I have tried them out before. After reading their website on their technology, like pushing the spark to the side for better combustion. Small tip for more intense sparking and so on. To me nothing much to feel....:smokin:
Even feedback from members are like smoother drive, some say better pick up but these are all butt feel. Or better you google on spark plug and read for yourself.

What I can say is for those people driving car that changing plugs are a pain in the butt, better use Iridium.
 

g88

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g88

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are you still using 4G92 SOHC ECU/Map sensor ? How about throttle body size ?

---------- Post added at 09:29 AM ---------- 6 hour anti-bump limit - Previous post was at 09:28 AM ----------

Since you are on 4G93 SOHC block now, next thing might even poison you more will be DOHC head...follow by GSR Turbo kit...all mostly plug and play..you will jump from current HP to 200-300 HP easily.
 

CharmCheeBye

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CharmCheeBye

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Well, I have tried them out before. After reading their website on their technology, like pushing the spark to the side for better combustion. Small tip for more intense sparking and so on. To me nothing much to feel....:smokin:
Even feedback from members are like smoother drive, some say better pick up but these are all butt feel. Or better you google on spark plug and read for yourself.

What I can say is for those people driving car that changing plugs are a pain in the butt, better use Iridium.
nice explanation.... thanks for your help....

---------- Post added at 09:42 AM ---------- 6 hour anti-bump limit - Previous post was at 09:41 AM ----------

are you still using 4G92 SOHC ECU/Map sensor ? How about throttle body size ?

---------- Post added at 09:29 AM ---------- 6 hour anti-bump limit - Previous post was at 09:28 AM ----------

Since you are on 4G93 SOHC block now, next thing might even poison you more will be DOHC head...follow by GSR Turbo kit...all mostly plug and play..you will jump from current HP to 200-300 HP easily.

the only things i change is the head n block... engine lantai... others like wiring ecu throtle body manifold ( others than head n block ) all use back the 4g92p item... EXCEPT THE TIMING BELT... NEED TO BUY NEW 1.8 TIMING SET AS 1.6 TIMING BELT WONT SUIT 1.8
 

KLEMANN

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Hi bro,

Just to ask, before issue solved...does your engine jerking during idling?
 

vr2turbo

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vr2turbo

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the only things i change is the head n block... engine lantai... others like wiring ecu throtle body manifold ( others than head n block ) all use back the 4g92p item... EXCEPT THE TIMING BELT... NEED TO BUY NEW 1.8 TIMING SET AS 1.6 TIMING BELT WONT SUIT 1.8
Oh! now I read it more clearly, means the whole engine change to 1.8 but using 1.6 harness. This way you engine will still run as a 1.6 system, probably not enough fuel.
Changing to larger displacement best should get half cut and transplant everything....:driver:
 

ftzone

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ftzone

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The only way to know if your current setup have an ideal Air Fuel Ratio is to use a Wideband O2 sensor and measure the AFR. It can be done on-road or on a DYNO.
If slightly leaner.. just add fuel pressure regulator and bump up the pressure a bit.
I think a lot of mechanics these days have a wideband kit ready at their workshop.
For one I have it. I charge RM30-40 for AFR monitoring on-road. Or the more expensive way; a DYNO RUN
 

CharmCheeBye

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The only way to know if your current setup have an ideal Air Fuel Ratio is to use a Wideband O2 sensor and measure the AFR. It can be done on-road or on a DYNO.
If slightly leaner.. just add fuel pressure regulator and bump up the pressure a bit.
I think a lot of mechanics these days have a wideband kit ready at their workshop.
For one I have it. I charge RM30-40 for AFR monitoring on-road. Or the more expensive way; a DYNO RUN
mind to explain furthermore? kinda interested