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Help End My Nightmare Before Christmas!! Idle Issue Fiesta 1.4 Zetec

Zetec 1.4 fiesta idle shaking

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#16 sazwahhh

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Posted 17 November 2013 - 10:16 AM

These any good?

 

http://cgi.ebay.co.u...em=200977275628 - FORD FIESTA MK 6/7 02-07 ELECTRIC THROTTLE PEDAL BODY UNIT

 

 

http://www.ebay.co.u...=item43a809db21 - 1.4 Throttle Potentiometer

 

 

Thanks



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#17 Dan62

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Posted 17 November 2013 - 11:21 AM

.



#18 wase16ll

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Posted 17 November 2013 - 01:58 PM

not being funny here, but think your best bet is to get it checked before throwing more money at it.

 

if no codes are logged then there is a good chance its something far simpler than throttle body/pedal sensors

 

taking it back to the beginning, you've had head off and valves changed...for starters you wont get codes for faulty valves, would only log a misfire..so take it garage did a compression test to pinpoint a valve problem

what isnt clear is, do you still have a misfire problem or just an idle issue

 

if its just an idle issue is it constant or sporadic.

does it have any other issues, such as power loss.

 

 

you said that light is off and no other codes showing, you also said head had been removed previously and wrong sealant on cover...the cover doesnt need sealant, this alone can cause an issue if that sealent contaminates the lambda sensor...

 

would recommend getting the codes rechecked and getting the exhaust gasses tested, if it still has a misfire issue, would also recommend another compression test.

it doesnt make sense to buy throttle bodies etc when you have no reason to suspect them beyond others having similar issues..have only ever changed one in 15yrs, and that was only because the position sensor wasnt available as a seperate sensor.



#19 sazwahhh

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Posted 17 November 2013 - 02:33 PM

not being funny here, but think your best bet is to get it checked before throwing more money at it.

 

if no codes are logged then there is a good chance its something far simpler than throttle body/pedal sensors

 

taking it back to the beginning, you've had head off and valves changed...for starters you wont get codes for faulty valves, would only log a misfire..so take it garage did a compression test to pinpoint a valve problem

what isnt clear is, do you still have a misfire problem or just an idle issue

 

if its just an idle issue is it constant or sporadic.

does it have any other issues, such as power loss.

 

 

you said that light is off and no other codes showing, you also said head had been removed previously and wrong sealant on cover...the cover doesnt need sealant, this alone can cause an issue if that sealent contaminates the lambda sensor...

 

would recommend getting the codes rechecked and getting the exhaust gasses tested, if it still has a misfire issue, would also recommend another compression test.

it doesnt make sense to buy throttle bodies etc when you have no reason to suspect them beyond others having similar issues..have only ever changed one in 15yrs, and that was only because the position sensor wasnt available as a seperate sensor

 

 

Thanks for your reply I really appreciate everyones thoughts on this dilemma!

 

They have done a few code recheck/compression tests since changing valves but only slight improvement on compression test.  No improvement on the driving though.

 

Basically the car cuts out when coming to a junction or slowing down.  The needle shakes also in low gears/idle.

 

The garage basically said they cannot figure out why its still doing it? So im stuck with this shed on my drive :( Do not know what to do and what to spend money on..

 

Thanks,

 

Sarah



#20 sazwahhh

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Posted 17 November 2013 - 02:35 PM

It also judders/shakes in low gears/idle like im on the old kangaroo petrol!



#21 sazwahhh

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Posted 17 November 2013 - 02:45 PM

This is the vehicle report if it helps...
 

The vehicle upon inspection was cutting out and the revs of the engine would be missing.  The number four cylinder was low on compression this we assumed would be the reason why the vehicle was missing revs.

We proceeded to take the Head off and discovered that two valves on the outlet exhaust were leaking. We inspected the engine and could see that the Head had been taken off before and worked on previously. The valves had been replaced and one of the valves was not lapped in correctly. The wrong sealant was used for the rock cover when the vehicle was previously worked on. We replaced two valves on the vehicle; however the vehicle was not performing how a vehicle of that mileage should perform. We changed the spark plugs, ignition coil, gasket and cleansed the catalytic converter. Although the vehicle has improved, this is only a slight improvement. We repeated this procedure twice. We consulted other garages in the local area to gain further professional opinions but they could not understand why the vehicle is still missing revs.

 

We noted that the acceleration pedal was packed out with cable tie and tape to keep therevs high in the vehicle. This would give the appearance of the vehicle functioning normally and the revs being a normal rate for acceleration. It is clear that somebody knew there was a defect in the vehicle for them to have packed the acceleration.

 

Sarah

 



#22 wase16ll

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Posted 17 November 2013 - 02:45 PM

so do you think you still have a misfire issue, or is the engine 'smooth' but idling badly?



#23 sazwahhh

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Posted 17 November 2013 - 02:49 PM

If the engine is in high gears then it is smooth but low gears/idle it judders the needle shakes up and down then cuts out when slowing down/coming to junctions.  It is even worse when cold but slightly better when engine warm but not amazing.

 

Thanks :)



#24 Stoney871

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Posted 17 November 2013 - 02:51 PM

Throttle body or maybe at a push could be the MAF sensor.

#25 sazwahhh

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Posted 17 November 2013 - 02:52 PM

Throttle body or maybe at a push could be the MAF sensor.

Ive been told there is no MAF sensor on my car? As electronic pedal? Not sure if this is correct.



#26 wase16ll

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Posted 17 November 2013 - 03:05 PM

can have either a MAF or a MAP sensor

depends on engine code but easiest way to see, look for a sensor on the large air hose that runs from air filter to throttle body, should be on the top near the air filter...thats a MAF, if nothing there then it has a MAP on the inlet manifold.

 

is this a manual or automatic



#27 sazwahhh

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Posted 17 November 2013 - 03:07 PM

Manual 2003 1.4 Zetec



#28 sazwahhh

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Posted 17 November 2013 - 03:16 PM

Just been searching and apparently I have a TMAP sensor? Also some people say to change HT leads what are these??  Apparently garage tried a coil pack but no difference but im wondering if I should try all three?



#29 wase16ll

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Posted 17 November 2013 - 03:24 PM

ok

there  are a number of reasons that could cause your issue.

 

there has been no mention of the idle air control valve being checked, if thats so then has to be worth removing and cleaned.

 

beyond that, what concerns me is that you said compressions were rechecked and showed slight improvement, does that mean the figures still werent ideal?

also, the bodge on the gas pedal makes me wonder if an attempt was made to alter the base setting of the throttle butterfly, if thats been tampered with then that base setting needs to be reset.

 

but can only recommend that those exhaust gasses get checked, could have a very simple problem with emissions, caused by temp sensor, a faulty 02 sensor amongst others (its the attempt at cat cleaning that makes me think this, cat cleaning is rarely successful but begs the question, why?? this was done)  exhaust emissions is a vital clue in diagnostics



#30 wase16ll

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Posted 17 November 2013 - 03:29 PM

re the HT leads, it all narrows down to if there is a misfire or not.....if you have a misfire then could very well be HT leads, think this is probably your best first step, find someone that can give you a definitive answer of engine misfiring or not....makes a massive difference in where to look for problem



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