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Old 08-09-2012   #1
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03 1.2 8v Punto revving choking issue

Hi i need some help my punto has been running ok since i did the head gasket and belt. But today its really under powered. If im parked up and press the accelerator 50% of the way down it revs nice and slow up to 6k rev but if i put my foot flat to the floor it chokes (the engine gets really loud) and drops to 4k and work go above. Im assuming some sort of throttle problem but any help or advice would be appreciated. Not sure if it matters but i just replace the knock sensor yesterday ?

Thanks ryan
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Old 08-09-2012   #2
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Re: 03 1.2 8v Punto revving choking issue

Quote Originally Posted by Rharwood View Post
Hi i need some help my punto has been running ok since i did the head gasket and belt. But today its really under powered. If im parked up and press the accelerator 50% of the way down it revs nice and slow up to 6k rev but if i put my foot flat to the floor it chokes (the engine gets really loud) and drops to 4k and work go above. Im assuming some sort of throttle problem but any help or advice would be appreciated. Not sure if it matters but i just replace the knock sensor yesterday ?

Thanks ryan
why would you do that?
a knock sensor would normally only go if it was working overtime
what compressions do you have on all 4 cylinders?
doesnt sound good im afraid

forgot to add your symptoms also point to timing being out possibly
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Old 08-09-2012   #3
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Re: 03 1.2 8v Punto revving choking issue

Quote Originally Posted by s and b View Post
why would you do that?
a knock sensor would normally only go if it was working overtime
what compressions do you have on all 4 cylinders?
doesnt sound good im afraid

forgot to add your symptoms also point to timing being out possibly
Because i had a P1325 knock sensor error code. Compressions and timing are spot on so im stuck
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Old 09-09-2012   #4
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Re: 03 1.2 8v Punto revving choking issue

compression figurez tho?

1 cylinder can be down Nd when ask the car to go it just farts smokes out its arse and u look a tit

timing defo correct? Both cam and crank align up correctly?
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Old 09-09-2012   #5
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Re: 03 1.2 8v Punto revving choking issue

Quote Originally Posted by Ziggy122 View Post
compression figurez tho?

1 cylinder can be down Nd when ask the car to go it just farts smokes out its arse and u look a tit

timing defo correct? Both cam and crank align up correctly?
I dont have specifics as ive lent my tester out but it was all fine after i changed the headgasket. And timing is 100% correct
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Old 09-09-2012   #6
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Re: 03 1.2 8v Punto revving choking issue

The test was fine straight after HG

Buts not straight after now is it?

Could be a burnt out valve - compression could be wrong due a to "thick" or "thin" hg for skimming purpos's

Compression test time again - so steal it back

Ziggy
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Old 02-10-2012   #7
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Re: 03 1.2 8v Punto revving choking issue

Hi got a fiat scanner on it today and got the following :
P0505 Idele control sys The reason for this fault is that ECU did not receive signal from the sensor
P0120 TP Senor/Switch The reason for this fault is that ECU has received very high signal from the sensor
P0105 MAP/BARO Pressure The reason for this fault is that ECU has received very low signal from the sensor.
P0110 Intake air temp The reason for this fault is that ECU has received very high signal from the sensor
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Old 02-10-2012   #8
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Re: 03 1.2 8v Punto revving choking issue

wheres your compression tests
whats your vacuum readings
those figures also point to bad wiring/connections

why do a scan but not do basic mechanical checks?
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Old 02-10-2012   #9
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Re: 03 1.2 8v Punto revving choking issue

Going on those tests, poor connections to the (combined, in this case) MAP/Inlet air temp connector or a cable fault there -- check also that the IAC is actually connected. Points to sloppy reconnection after inlet manny reconnected. And as S & B says.
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Old 03-10-2012   #10
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Re: 03 1.2 8v Punto revving choking issue

Still waiting on the retrn of my tester. Could it be faulty ecu ??
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Old 03-10-2012   #11
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Re: 03 1.2 8v Punto revving choking issue

Unlikely in the extreme.
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