Fast idle 1.3 Felicia

chrisfaux · 29-01-2008, 13:08

Afternoon,

I serviced a friends Felicia 1.3 R reg last weekend and did the valve clearences and cleaned the throttle body with brake clener. The throttle body was cleaned whilst the engine was running. Now the engine will not run slowly, less than 1500rpm. Any suggestions?

Thanks

Chris

philje123 · 29-01-2008, 13:15

Think the throttle body need re-setting... disconnect the battery for 30 mins approx i think and that should do the trick!!

It will reset the learnt values inside the ECU.

chrisfaux · 29-01-2008, 13:18

Thanks Philje123, I will give it a go

chrisfaux · 06-02-2008, 12:48

I took off the battery for 2hrs but with no joy. I took the battery off again and disconnected the ECU and bingo it worked.

Many thanks

chrisfaux · 07-02-2008, 13:48

The problem has returned, shall I do the same again? Or to the garage?

philje123 · 08-02-2008, 13:50

If the problem has returned then there obviously some issues there.,... would give it another go at re-setting the ecu then try and get it hooked up to someones laptop who has VAG-com and see what, if any, fault its throwing up.

If not then to the garage it is!

Phil

chrisfaux · 16-04-2008, 13:04

The problem is still there. The garage has said it needs a new throttle body. Is this likely?

Thanks

Chris

ap0gee · 16-04-2008, 13:14

Could have been the brake cleaner if it got into the internals - I've only ever seen carburettor cleaner suggested on here before, but don't know if there's much of a difference. Was the brake cleaner a spray, or did you use something to put it on? I was about to start using cotton wool to clean the throttle body on my wife's car when a vision of blob of the stuff falling into the inlet manifold, leaving bits of fluff everywhere flashed before my eyes!

Used an old chamois in the end so it didn't fall apart or leave lint everywhere...

fordfan · 16-04-2008, 13:19

It is a distinct possibility, but first check that there is some slack in the cable. You may well be able to do the basic setting by leaving the ignition on for a minute (engine not running).

richardsfavorit · 16-04-2008, 18:44

I would try a second hand one first - I have done this with a few of my Felicia's in the past. A second hand one should be must cheaper - and at £100+ for a throttle body its well worth it.

harryhill · 16-04-2008, 23:10

Has the car idle been a problem before cleaning it?

What is the usual idle like?......is it smooth (or as smooth as these engines can be!)

My fast idle and lumpy running was down to a stuffed inlet manifold gasket which cost virtually nothing to fix.

An air leak will mean a fast idle so i wonder if the brake cleaner has knacked the throttle body gasket?? Not sure how agressive brake cleaner is though as i use carb cleaner.

Another possibility is that the brake cleaner may have interfered with the MAP sensor giving false readings and thus wrong readings?

I am not convinced that it needs a new throttle body

poorly_felicia · 20-04-2008, 11:55

a mecahnic at our local skoda dealership told me ages ago when we were having similar problems tat if you disconnect the MAP sensor cable with the engine running it will crash the ECU, forcing it to reset to basic settings when the engine restarts.

Did the trick for me with simliar issues.

chrisfaux · 21-04-2008, 09:42

Morning,

I have tried everything now!! A new throttle body, temp sensor, sensor on the back of the throttle body, no difference. Help.

It did idle correctly on and off yesterday but I cannot rely on it. It has also failed the MOT on emmissions. I assume this is because it was running fast. I have also replaced the lambda sensor with a second hand one but I now it was working. Any ideas??

After all this I disconnected the battery for an hour or so and checked all the valve clearences.

The car was running fine before I cleaned the carb and adjusted the clearences.

Anyone in the St Neots area who could help or has VAG com?

harryhill · 21-04-2008, 22:56

Nothing showing up on diagnostics, everything replaced.

For my money i would put a bet on it being the inlet manifold gasket.

chrisfaux · 22-04-2008, 13:05

I have sprayed carb cleaner all around the inlet manifold and there is no change in the RPM. Does anyone know how good the Snap On MT 2500 diagnostic equipment is, I am thinking of buying one?

Thanks

Chris

rigsby · 22-04-2008, 21:18

Temp sender gon titsup, the section that tells the ECU telling it that it is cold , thus overfueling and lifting the revs
BASICALY THE CHOKE IS ON ALL THE TIME

29-01-2008, 13:08	#1
chrisfaux Briskodian Join Date: Jan 2008 Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Fast idle 1.3 Felicia Afternoon, I serviced a friends Felicia 1.3 R reg last weekend and did the valve clearences and cleaned the throttle body with brake clener. The throttle body was cleaned whilst the engine was running. Now the engine will not run slowly, less than 1500rpm. Any suggestions? Thanks Chris

29-01-2008, 13:15	#2
philje123 Nelly the Felly Join Date: Feb 2007 Location: York Posts: 1,594 Thanks: 45 Thanked 80 Times in 76 Posts	Re: Fast idle 1.3 Felicia Think the throttle body need re-setting... disconnect the battery for 30 mins approx i think and that should do the trick!! It will reset the learnt values inside the ECU. __________________ 96 Felicia Laurin & Klement 1.3 spi Hatchback (Now with Auto Headlights) -New timing chain -MOT passed with flying colours 10/2007 -71,000 miles and counting!!

29-01-2008, 13:18	#3
chrisfaux Briskodian Join Date: Jan 2008 Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Fast idle 1.3 Felicia Thanks Philje123, I will give it a go

06-02-2008, 12:48	#4
chrisfaux Briskodian Join Date: Jan 2008 Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Fast idle 1.3 Felicia I took off the battery for 2hrs but with no joy. I took the battery off again and disconnected the ECU and bingo it worked. Many thanks

07-02-2008, 13:48	#5
chrisfaux Briskodian Join Date: Jan 2008 Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Fast idle 1.3 Felicia The problem has returned, shall I do the same again? Or to the garage?

08-02-2008, 13:50	#6
philje123 Nelly the Felly Join Date: Feb 2007 Location: York Posts: 1,594 Thanks: 45 Thanked 80 Times in 76 Posts	Re: Fast idle 1.3 Felicia If the problem has returned then there obviously some issues there.,... would give it another go at re-setting the ecu then try and get it hooked up to someones laptop who has VAG-com and see what, if any, fault its throwing up. If not then to the garage it is! Phil __________________ 96 Felicia Laurin & Klement 1.3 spi Hatchback (Now with Auto Headlights) -New timing chain -MOT passed with flying colours 10/2007 -71,000 miles and counting!!

16-04-2008, 13:04	#7
chrisfaux Briskodian Join Date: Jan 2008 Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Fast idle 1.3 Felicia The problem is still there. The garage has said it needs a new throttle body. Is this likely? Thanks Chris

16-04-2008, 13:14	#8
ap0gee ASZ Eternal Join Date: Aug 2004 Location: Leafy Chesh-shire Posts: 6,293 Thanks: 304 Thanked 306 Times in 263 Posts	Re: Fast idle 1.3 Felicia Could have been the brake cleaner if it got into the internals - I've only ever seen carburettor cleaner suggested on here before, but don't know if there's much of a difference. Was the brake cleaner a spray, or did you use something to put it on? I was about to start using cotton wool to clean the throttle body on my wife's car when a vision of blob of the stuff falling into the inlet manifold, leaving bits of fluff everywhere flashed before my eyes! Used an old chamois in the end so it didn't fall apart or leave lint everywhere... __________________

16-04-2008, 13:19	#9
fordfan ECUless Join Date: Mar 2005 Posts: 1,890 Thanks: 28 Thanked 216 Times in 188 Posts	Re: Fast idle 1.3 Felicia It is a distinct possibility, but first check that there is some slack in the cable. You may well be able to do the basic setting by leaving the ignition on for a minute (engine not running).

16-04-2008, 18:44	#10
richardsfavorit Briskodian Join Date: Jan 2007 Location: Newtown Wales Posts: 475 Thanks: 20 Thanked 33 Times in 33 Posts	Re: Fast idle 1.3 Felicia I would try a second hand one first - I have done this with a few of my Felicia's in the past. A second hand one should be must cheaper - and at £100+ for a throttle body its well worth it.

16-04-2008, 23:10	#11
harryhill Briskodian Join Date: Oct 2006 Location: Newcastle upon tyne Posts: 366 Thanks: 13 Thanked 50 Times in 44 Posts	Re: Fast idle 1.3 Felicia Has the car idle been a problem before cleaning it? What is the usual idle like?......is it smooth (or as smooth as these engines can be!) My fast idle and lumpy running was down to a stuffed inlet manifold gasket which cost virtually nothing to fix. An air leak will mean a fast idle so i wonder if the brake cleaner has knacked the throttle body gasket?? Not sure how agressive brake cleaner is though as i use carb cleaner. Another possibility is that the brake cleaner may have interfered with the MAP sensor giving false readings and thus wrong readings? I am not convinced that it needs a new throttle body __________________ Skoda 1.3GLi 1998 now reading LXi on the back due to tailgate swop. Bought for £30 and still going strong

20-04-2008, 11:55	#12
poorly_felicia Briskodian Join Date: Jun 2006 Posts: 115 Thanks: 2 Thanked 4 Times in 4 Posts	Re: Fast idle 1.3 Felicia a mecahnic at our local skoda dealership told me ages ago when we were having similar problems tat if you disconnect the MAP sensor cable with the engine running it will crash the ECU, forcing it to reset to basic settings when the engine restarts. Did the trick for me with simliar issues.

21-04-2008, 09:42	#13
chrisfaux Briskodian Join Date: Jan 2008 Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Fast idle 1.3 Felicia Morning, I have tried everything now!! A new throttle body, temp sensor, sensor on the back of the throttle body, no difference. Help. It did idle correctly on and off yesterday but I cannot rely on it. It has also failed the MOT on emmissions. I assume this is because it was running fast. I have also replaced the lambda sensor with a second hand one but I now it was working. Any ideas?? After all this I disconnected the battery for an hour or so and checked all the valve clearences. The car was running fine before I cleaned the carb and adjusted the clearences. Anyone in the St Neots area who could help or has VAG com?

21-04-2008, 22:56	#14
harryhill Briskodian Join Date: Oct 2006 Location: Newcastle upon tyne Posts: 366 Thanks: 13 Thanked 50 Times in 44 Posts	Re: Fast idle 1.3 Felicia Nothing showing up on diagnostics, everything replaced. For my money i would put a bet on it being the inlet manifold gasket. __________________ Skoda 1.3GLi 1998 now reading LXi on the back due to tailgate swop. Bought for £30 and still going strong

22-04-2008, 13:05	#15
chrisfaux Briskodian Join Date: Jan 2008 Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Fast idle 1.3 Felicia I have sprayed carb cleaner all around the inlet manifold and there is no change in the RPM. Does anyone know how good the Snap On MT 2500 diagnostic equipment is, I am thinking of buying one? Thanks Chris

22-04-2008, 21:18	#16
rigsby Briskodian Join Date: Jan 2004 Location: DONCASTER Posts: 1,005 Thanks: 16 Thanked 104 Times in 101 Posts	Re: Fast idle 1.3 Felicia Temp sender gon titsup, the section that tells the ECU telling it that it is cold , thus overfueling and lifting the revs BASICALY THE CHOKE IS ON ALL THE TIME __________________ I DONT WANT TO DIE A GROWN UP!!!

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