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2003 Renault Megane

Tiny
WEBSTER68
  • MEMBER
  • 2003 RENAULT MEGANE
Engine Mechanical problem
2003 Renault Megane Manual 68000 miles

when I drive check emmisions comes up on the dash it pulls back and wont let it drive properly then it will have a surge of power then pull back again we have tryed to get a diagnostic done to find the fault but it wont link with the code reader do you have any ideas what the problem could be
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Saturday, February 14th, 2009 AT 8:07 AM

17 Replies

Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
Could be a faulty TPS (throttle position sensor) but could also be other fault. Really needs a diagnostic run to locate the exact fault. It could be the code scanner you are using is the fault. Try another dignostic scanner or garage !
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Monday, February 16th, 2009 AT 6:55 AM
Tiny
WEBSTER68
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Thank you for your reply we have had the car on a diagnostic in the garage and it still wont link up could you tell me where I can locate the throttle position sensor
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Monday, February 16th, 2009 AT 7:52 AM
Tiny
DAVE H
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TPS is located on the throttle body. Have you tried renault diagnostic software. Is this a diesel?.
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Monday, February 16th, 2009 AT 8:02 AM
Tiny
WEBSTER68
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I have not tried a renault diagnostic software my car is a 1.4 petrol
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Tuesday, February 17th, 2009 AT 3:48 AM
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
This could actually be a bad PCM/ECU sending wrong signals. To the TPS or other sensor. Untill it actually links we will never really know?. My next course of action would be trying renault diagnostic's to see if it will link. I could be telling you to change parts untill we locate the problem ! Which would end more expensive than a diagnostic ! In the meantime try removing and cleaning the MAF sensor on the air cleaner housing !
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Tuesday, February 17th, 2009 AT 4:55 AM
Tiny
WEBSTER68
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  • 11 POSTS
Thank you I will give that a go and let you know the outcome
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Tuesday, February 17th, 2009 AT 5:27 AM
Tiny
DAVE H
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You could also try a good fuel cleaner to clean the lines and fuel injectors ! Let me know how it goes
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Tuesday, February 17th, 2009 AT 6:04 AM
Tiny
WEBSTER68
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  • 11 POSTS
Put my car in for a diagnostic useing renault software the only thing it has picked up on is faulty oxygen sensors would this cause the problems also cant afford the garages prices to fix it do u have any ideas
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Friday, February 20th, 2009 AT 1:57 AM
Tiny
WEBSTER68
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  • 11 POSTS
Can anyone tell me what a transian fault is this is showing on all 4 coils
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Friday, February 20th, 2009 AT 5:44 AM
Tiny
DAVE H
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Webster68 you will need to supply me with the fault codes?
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Friday, February 20th, 2009 AT 5:53 AM
Tiny
WEBSTER68
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Dont know what the fault codes are yet I pick the car up later today and will get the codes then
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Friday, February 20th, 2009 AT 6:21 AM
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
When you pick up the vehicle get a print out of the codes and repost with the codes. The megane has 2 different systems of coils fitted. One full coil pack and also a coil on each plug. I really need to know the fault codes before I can offer an opinion. The oxygen sensor replacement is a real easy repair !
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Friday, February 20th, 2009 AT 6:57 AM
Tiny
WEBSTER68
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Picked the car up the codes on the coils are df072 df073 df074 df075 does that help
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Saturday, February 21st, 2009 AT 1:27 AM
Tiny
DAVE H
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How is the car running now? Our first fault was a "surge" of power now and then. Now you have bad coils or coil pack (which system is fitted?) Is it misfiring? Is it misfiring when hot? The coils going bad would not really give a "surgeing" in acceleration. You would get misfiring and the engine jerking. Kangarooing?
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Saturday, February 21st, 2009 AT 7:38 PM
Tiny
WEBSTER68
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The car is still running poor and having power surges its not misfireing we have coils in our car not coil packs
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Sunday, February 22nd, 2009 AT 2:39 AM
Tiny
DAVE H
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Do you have single COP (coil on plug) ? if so you need to replace each one .. or check the wiring going to these ? you could also check/clean or replace the CKP (crankshaft position sensor)


https://www.2carpros.com/forum/automotive_pictures/266999_cop_3.jpg

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Monday, February 23rd, 2009 AT 9:15 AM
Tiny
WEBSTER68
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Thankyou for the advice they are single coils on plug and I will try everything you have suggested again thankyou
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Monday, February 23rd, 2009 AT 2:14 PM

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