FIAT Petra 1.6 RPM falling down to ZERO

planet_rocker · 4th March 2010, 22:10

i sprayed WD40 around the wheel thingy (in between the metal body and the wheel) which is connected to the accelerator cable - it has helped to some extent. make sure you place a cloth below the TB to avoid excess oil dripping.

FIAT Petra 1.6 RPM falling down to ZERO-photo0286.jpg

arjunrudra · 4th March 2010, 22:19

I had the exact same problem in the 1.6 opel corsa. Everytime the clutch was pressed the rpm would fall to 0.Got this fixed . The problem was there was something wrong with the sensor.Costed me 700 rs only.

planet_rocker · 4th March 2010, 22:48

1.6s behave a bit differently - erratic idles. rpm sticks at 1100-1500 range > falls down to 500 (at time stalls) > pulls itself up from 500 > sticks at 850 and the cycle continues.

the problem is more prominent when the engine is hot = the oily gum becomes more sticky inside the TB.

DRC · 5th March 2010, 13:22

OK..
Just back from the garage.
Most parts suspected had been cleaned. TB, Manifold, EEC valve etc... I guess the erratic idle issue seems to have gone or may be it is too early to comment.

However, that slight vibration as if the engine is missing a beat is still there. It only happens when in idle and AC off.

Will update as I go. mean while your thoughts please!

planet_rocker · 5th March 2010, 13:30

can you show us a pic where the soots were present? it will be very helpful.

the minor jerk (single) is present in my car as well but that doesn't happen always (even in a hot engine) while idling.

all the best - keep us updated.

Subodh Kumar · 7th March 2010, 00:10

Dear Mr. Deepgautam,

Let me share some of my experience as I have been suffering from this problem since last six - eight months.

I am / was also facing almost similar problems. RPM was fluctuating between 200 to 3000 rpm, sometimes even zero and car coming to stop. The problem is more pronounced in start-stop traffic when the car moves in first 2nd gear. There is a loss of power under such circumstances, car frequently stalls. However, after sometimes when the car is allowed to cool. the problem vanishes.

I got the throttle body cleaned. No effect. Checked the car on examiner, some errors were there, removed. Problem reoccured.

Got the throttle body replaced as suggested by M/s Elegant motors, Patpadganj (probably the best service centers for FIAT cars). Problem is still persisting. Around a fortnight back, again visited the service centers, the car was examined on scanner, following errors were present: air temp error, water temp error, RPM sensor, potentiometer error.

I am told that ECU is probably faulty because these many sensors can not be faulty simultaneously. I was suggested to replace it. Of late, I found that engine overheat problem is also coming which I was said that it is linked with ECU problem.

I plan to get the ECU replaced next week, but before that, I want to seek opinion of FIAT experts. Even now, I am not 100% sure, whether the problem will be rectified by changing the ECU.
The ECU costs 10000 Rs.
I request experts to give their valuable advice.

Regards

Subodh Kumar

planet_rocker · 7th March 2010, 00:18

Ecu costs 16k in kol. Injectors could be clogged. Try and use system g with regular fuel - 2 tank fulls. Or get injectors cleaned. Reset the ecu. Unplug the negative terminal of the battery for 30mins. Plug it back.
check fuel filter and air filter.
the last error points to dirty icv / throttle body.

Subodh Kumar · 7th March 2010, 10:52

Dear Planet Rocker

I regularlu use system G. Also, 2-3 months back, I used a solution (I am forgetting the name, probably presto - one bottle in full tank), I got the improvement in fuel efficiency, but the problem persisted.

ECU of 1.6 Petra / Palio cost Rs. 10000.

Regards

spacefugitive · 15th August 2010, 22:09

Hi Deep,
Im facing very similar problem with my Fiat Siena, as you had faced with your petra. The problem only happens when I park my car for some time after I have driven it for a while. Also if I leave the car alone for about half an hour, the problem rectifies itself.

Were you able to solve this problem? If so, could you tell me how? Thanks.
Aninda.

Joseph · 20th July 2015, 17:55

I am having similar problems with my palio 1.6 and none are able to diagnose the issue :(

vijaycool · 24th July 2015, 00:12

Quote:

Originally Posted by Joseph

I am having similar problems with my palio 1.6 and none are able to diagnose the issue :(

what is the issue you are facing

DRC · 24th July 2015, 17:58

Josef, I think you bumped up a 5 year old thread.
If you are referring to the unstable idle and sometime engine stall issue on a Fiat 1.6 petrol, (same as I faced, )issue was traced to the ignition coil. They seem to have a limited life and fail invariably. I had to replace them twice in 10 years of ownership.

4th March 2010, 22:10	#16
planet_rocker Senior - BHPian Join Date: Sep 2006 Location: Bong-land Posts: 2,323 Thanked: 426 Times	i sprayed WD40 around the wheel thingy (in between the metal body and the wheel) which is connected to the accelerator cable - it has helped to some extent. make sure you place a cloth below the TB to avoid excess oil dripping. Last edited by planet_rocker : 4th March 2010 at 22:12.
	() Thanks

4th March 2010, 22:19	#17
arjunrudra Senior - BHPian Join Date: Jul 2008 Location: Gurgaon/Chennai Posts: 1,577 Thanked: 197 Times View My Garage	I had the exact same problem in the 1.6 opel corsa. Everytime the clutch was pressed the rpm would fall to 0.Got this fixed . The problem was there was something wrong with the sensor.Costed me 700 rs only.
	() Thanks

4th March 2010, 22:48	#18
planet_rocker Senior - BHPian Join Date: Sep 2006 Location: Bong-land Posts: 2,323 Thanked: 426 Times	1.6s behave a bit differently - erratic idles. rpm sticks at 1100-1500 range > falls down to 500 (at time stalls) > pulls itself up from 500 > sticks at 850 and the cycle continues. the problem is more prominent when the engine is hot = the oily gum becomes more sticky inside the TB. Last edited by planet_rocker : 4th March 2010 at 22:50.
	() Thanks

5th March 2010, 13:22	#19
DRC BHPian Join Date: Dec 2004 Location: Cockpit Posts: 911 Thanked: 64 Times View My Garage	OK.. Just back from the garage. Most parts suspected had been cleaned. TB, Manifold, EEC valve etc... I guess the erratic idle issue seems to have gone or may be it is too early to comment. However, that slight vibration as if the engine is missing a beat is still there. It only happens when in idle and AC off. Will update as I go. mean while your thoughts please!
	() Thanks

5th March 2010, 13:30	#20
planet_rocker Senior - BHPian Join Date: Sep 2006 Location: Bong-land Posts: 2,323 Thanked: 426 Times	can you show us a pic where the soots were present? it will be very helpful. the minor jerk (single) is present in my car as well but that doesn't happen always (even in a hot engine) while idling. all the best - keep us updated.
	() Thanks

7th March 2010, 00:10	#21
Subodh Kumar BHPian Join Date: Jun 2006 Location: Noida Posts: 30 Thanked: 2 Times	Facing similar problems Dear Mr. Deepgautam, Let me share some of my experience as I have been suffering from this problem since last six - eight months. I am / was also facing almost similar problems. RPM was fluctuating between 200 to 3000 rpm, sometimes even zero and car coming to stop. The problem is more pronounced in start-stop traffic when the car moves in first 2nd gear. There is a loss of power under such circumstances, car frequently stalls. However, after sometimes when the car is allowed to cool. the problem vanishes. I got the throttle body cleaned. No effect. Checked the car on examiner, some errors were there, removed. Problem reoccured. Got the throttle body replaced as suggested by M/s Elegant motors, Patpadganj (probably the best service centers for FIAT cars). Problem is still persisting. Around a fortnight back, again visited the service centers, the car was examined on scanner, following errors were present: air temp error, water temp error, RPM sensor, potentiometer error. I am told that ECU is probably faulty because these many sensors can not be faulty simultaneously. I was suggested to replace it. Of late, I found that engine overheat problem is also coming which I was said that it is linked with ECU problem. I plan to get the ECU replaced next week, but before that, I want to seek opinion of FIAT experts. Even now, I am not 100% sure, whether the problem will be rectified by changing the ECU. The ECU costs 10000 Rs. I request experts to give their valuable advice. Regards Subodh Kumar
	() Thanks

7th March 2010, 00:18	#22
planet_rocker Senior - BHPian Join Date: Sep 2006 Location: Bong-land Posts: 2,323 Thanked: 426 Times	Ecu costs 16k in kol. Injectors could be clogged. Try and use system g with regular fuel - 2 tank fulls. Or get injectors cleaned. Reset the ecu. Unplug the negative terminal of the battery for 30mins. Plug it back. check fuel filter and air filter. the last error points to dirty icv / throttle body. Last edited by GTO : 8th March 2010 at 11:09. Reason: STRICTLY no SMS language please. Corrected.
	() Thanks

7th March 2010, 10:52	#23
Subodh Kumar BHPian Join Date: Jun 2006 Location: Noida Posts: 30 Thanked: 2 Times	Dear Planet Rocker I regularlu use system G. Also, 2-3 months back, I used a solution (I am forgetting the name, probably presto - one bottle in full tank), I got the improvement in fuel efficiency, but the problem persisted. ECU of 1.6 Petra / Palio cost Rs. 10000. Regards
	() Thanks

15th August 2010, 22:09	#24
spacefugitive Newbie Join Date: Jan 2010 Location: Bangalore Posts: 18 Thanked: Once	Hi Deep, Im facing very similar problem with my Fiat Siena, as you had faced with your petra. The problem only happens when I park my car for some time after I have driven it for a while. Also if I leave the car alone for about half an hour, the problem rectifies itself. Were you able to solve this problem? If so, could you tell me how? Thanks. Aninda.
	() Thanks

20th July 2015, 17:55	#25
Joseph Newbie Join Date: Jun 2007 Location: Bangalore Posts: 11 Thanked: 0 Times	Re: FIAT Petra 1.6 RPM falling down to ZERO I am having similar problems with my palio 1.6 and none are able to diagnose the issue :(
	() Thanks

24th July 2015, 17:58	#27
DRC BHPian Join Date: Dec 2004 Location: Cockpit Posts: 911 Thanked: 64 Times View My Garage	Re: FIAT Petra 1.6 RPM falling down to ZERO Josef, I think you bumped up a 5 year old thread. If you are referring to the unstable idle and sometime engine stall issue on a Fiat 1.6 petrol, (same as I faced, )issue was traced to the ignition coil. They seem to have a limited life and fail invariably. I had to replace them twice in 10 years of ownership.
	(2) Thanks