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 Post subject: SF N/A hesitating and almost stalling after start-up
PostPosted: Fri Feb 23, 2018 12:01 am 
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Vehicle: MY01- Silver

Posts: 32
Location: Victoria
Hi guys! im having some trouble with my foz. Whenever I start the car, doesnt matter if cold or not after i start it and drive, it hesitates and almost stalls. Happens both on gas and petrol. Cleaned the IACV, replaced the TPS, just put some UEC and still no luck. anyone had this problem before? thanks guys!


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 Post subject: Re: SF N/A hesitating and almost stalling after start-up
PostPosted: Sat Feb 24, 2018 8:45 pm 
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I Say: Needs more positive manifold pressure.
Vehicle: MY01 S/tb - MY01 STi II Type M

Posts: 4928
Location: Port Macquarie, NSW
I had a similar issue on one of my NA SF's. A new set of leads fixed it right up.

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MY01 STi II Type M -Garage Ornament
MY01 S/tb -The New Daily
MY00 Limited -The Old Daily
MY01 GT -Unfinished Project


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 Post subject: Re: SF N/A hesitating and almost stalling after start-up
PostPosted: Sun Feb 25, 2018 8:59 am 
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Vehicle: MY01- Silver

Posts: 32
Location: Victoria
Thanks. Ill give it a go.


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 Post subject: Re: SF N/A hesitating and almost stalling after start-up
PostPosted: Sun Feb 25, 2018 11:37 pm 
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Vehicle: MY01- Silver

Posts: 32
Location: Victoria
hi Chips. any brand you can recommend and also the part number? thanks.


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 Post subject: Re: SF N/A hesitating and almost stalling after start-up
PostPosted: Thu Mar 01, 2018 7:13 pm 
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I Say: Needs more positive manifold pressure.
Vehicle: MY01 S/tb - MY01 STi II Type M

Posts: 4928
Location: Port Macquarie, NSW
Nah, I just go into Bursons and buy whatever brand they have on the shelf that fits. Normally NGK if memory serves.

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MY01 STi II Type M -Garage Ornament
MY01 S/tb -The New Daily
MY00 Limited -The Old Daily
MY01 GT -Unfinished Project


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 Post subject: Re: SF N/A hesitating and almost stalling after start-up
PostPosted: Fri Mar 02, 2018 1:04 pm 
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Vehicle: MY01- Silver

Posts: 32
Location: Victoria
Hi Chips. replaced the leads with bosch super sports. still the same problem. could it be a bad O2 Sensor? or something else? thanks heaps.


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 Post subject: Re: SF N/A hesitating and almost stalling after start-up
PostPosted: Fri Mar 02, 2018 1:10 pm 
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I Say: Needs more positive manifold pressure.
Vehicle: MY01 S/tb - MY01 STi II Type M

Posts: 4928
Location: Port Macquarie, NSW
Did you check the plugs while you had the leads out?

Oil in the spark plug holes?

_________________
MY01 STi II Type M -Garage Ornament
MY01 S/tb -The New Daily
MY00 Limited -The Old Daily
MY01 GT -Unfinished Project


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 Post subject: Re: SF N/A hesitating and almost stalling after start-up
PostPosted: Fri Mar 02, 2018 3:07 pm 
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Vehicle: MY01- Silver

Posts: 32
Location: Victoria
yep. new iridium plugs, new rocker cover gasket and spark plug gaskets. no oil in spark plug holes. im running out of ideas. haha! cant be fuel related as it happens on both gas and petrol. also replaced the coil pack. still the same.


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 Post subject: Re: SF N/A hesitating and almost stalling after start-up
PostPosted: Fri Mar 02, 2018 4:45 pm 
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I Say: Needs more positive manifold pressure.
Vehicle: MY01 S/tb - MY01 STi II Type M

Posts: 4928
Location: Port Macquarie, NSW
Generally if the O2 sensor was gone, it would throw a code. I had an NA with the O2 sensor completely disconnected and the car ran fine. Just used a lot of fuel.

_________________
MY01 STi II Type M -Garage Ornament
MY01 S/tb -The New Daily
MY00 Limited -The Old Daily
MY01 GT -Unfinished Project


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 Post subject: Re: SF N/A hesitating and almost stalling after start-up
PostPosted: Mon Mar 05, 2018 2:25 pm 
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Vehicle: MY01- Silver

Posts: 32
Location: Victoria
no codes for the o2.. replaced the knock sensor even if there was no codes because i had a new one laying around. still the same result. could it be a bad head gasket?


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