Juddering at full throttle

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charliehoward
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Currently Drives:: Megane 250 RenaultSport Lux & Cup Pack Race Yellow
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Juddering at full throttle

Postby charliehoward » Mon Aug 07, 2017 5:33 pm

I had my car serviced about 3 weeks ago and since then it's developed a judder when I accelerate. It's giving me 2 errors codes, P0313 and P0136. Any ideas?

BrotherPlasterer
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Currently Drives:: 2005 Renault Megane 2 1.6 VVT Dynamique

Re: Juddering at full throttle

Postby BrotherPlasterer » Mon Aug 07, 2017 8:24 pm

Are your O2 sensor 2 voltage readings swinging back and forward/up and down as expected?
Copied from AutoTap Website...
"A good O2 sensor should produce an oscillating waveform at idle that makes voltage transitions from near minimum (0.1 v) to near maximum (0.9v). Making the fuel mixture artificially rich by feeding propane into the intake manifold should cause the sensor to respond almost immediately (within 100 milliseconds) and go to maximum (0.9v) output. Creating a lean mixture by opening a vacuum line should cause the sensor's output to drop to its minimum (0.1v) value. If the sensor doesn't flip-flop back and forth quickly enough, it may indicate a need for replacement. "

Perhaps its flat-lining and whoever serviced the car pulled a wire. Check all wiring. Strange though because I believe that in this case the fuel would be pegged high and your other code indicates a lean.

Code P0313 refers to an engine misfire under low fuel conditions. Read more at: https://www.obd-codes.com/p0313 Copyright OBD-Codes.com

grandadbobby
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Currently Drives:: megan dynamique estate 1.9dci

Re: Juddering at full throttle

Postby grandadbobby » Tue Aug 08, 2017 12:33 am

Hi,
l can't do those wave forms etc
but l think you need to check with where it was serviced if it had the fuel filter done.
lf yes l would check the pump pressure, if you undo the line, when ign on it should wollop out.
Obviously be careful and use a suitable can.
lf you can't do it, ask where it was serviced to test the pump.
Check connections on oxygen sensor, apparently somewhere near the cat exhaust.
Good luck, let us know the outcome please.
Bob.

BrotherPlasterer
Just Passed
Posts: 116
Joined: Sat Jul 02, 2016 10:09 pm
Currently Drives:: 2005 Renault Megane 2 1.6 VVT Dynamique

Re: Juddering at full throttle

Postby BrotherPlasterer » Tue Aug 08, 2017 9:09 pm

Sure I posted this earlier but it's not appeared!
Anyway, you don't need a fancy scanner just the android torque app or similar and a suitable OBD reader. You can graph the O2 sensors this way.

charliehoward
Passed Theory
Posts: 35
Joined: Mon Jul 17, 2017 3:03 pm
Currently Drives:: Megane 250 RenaultSport Lux & Cup Pack Race Yellow
Location: Southampton

Re: Juddering at full throttle

Postby charliehoward » Wed Aug 09, 2017 1:05 pm

I used one of the bluetooth OBD2 things and got the following results: https://i.imgur.com/YO9Xzj9.png

I imagine the plug they put in cylinder 1 is faulty but that would be strange.

I also think it has another electrical fault because yesterday while on the motorway my ABS, speedo, traction control and power steering all stopped working for 5 seconds and then came back.

BrotherPlasterer
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Posts: 116
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Currently Drives:: 2005 Renault Megane 2 1.6 VVT Dynamique

Re: Juddering at full throttle

Postby BrotherPlasterer » Wed Aug 09, 2017 9:56 pm

Did they just do a service? They didn't do the cam belt or anything like that?
Did they change the coils?

Try swapping coil 1 with one of the others. See if the problem moves.

Does this tool let you look at O2 voltages and fuel trims?

BrotherPlasterer
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Re: Juddering at full throttle

Postby BrotherPlasterer » Wed Aug 09, 2017 9:59 pm

The ABS/etc problem is scary indeed. I would be like WTF!
A similar thing happened on mine today (not CC but still a Renault) as I turned left suddenly the steering decided to jerk right. But this was on a slow corner and I was able to control it but it freaked me out, don't trust the car now :-(

charliehoward
Passed Theory
Posts: 35
Joined: Mon Jul 17, 2017 3:03 pm
Currently Drives:: Megane 250 RenaultSport Lux & Cup Pack Race Yellow
Location: Southampton

Re: Juddering at full throttle

Postby charliehoward » Thu Aug 10, 2017 8:22 am

I don't think they changed they coils. Just oil, filters, and plugs.

If it was just an engine misfire I would do it myself but seeing as a lot of other things are odd about it I have booked it in with a specialist for Monday, will update you guys when I know!

BrotherPlasterer
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Re: Juddering at full throttle

Postby BrotherPlasterer » Tue Aug 15, 2017 7:51 pm

Any updates?

charliehoward
Passed Theory
Posts: 35
Joined: Mon Jul 17, 2017 3:03 pm
Currently Drives:: Megane 250 RenaultSport Lux & Cup Pack Race Yellow
Location: Southampton

Re: Juddering at full throttle

Postby charliehoward » Tue Aug 15, 2017 7:53 pm

Sorry yes, they said it was just the ignition coils which seems strange to me so I'm going to replace them when I get back off holiday and see if it cures it.

It should cure the misfires but I just hope somehow it sorts the rest of it.

BrotherPlasterer
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Posts: 116
Joined: Sat Jul 02, 2016 10:09 pm
Currently Drives:: 2005 Renault Megane 2 1.6 VVT Dynamique

Re: Juddering at full throttle

Postby BrotherPlasterer » Wed Aug 16, 2017 7:52 pm

I would swap number 1 with 3 see if the problem moves.
Apparently they die in pairs, 1+2, 3+4.

Glad to hear it's ok though.

charliehoward
Passed Theory
Posts: 35
Joined: Mon Jul 17, 2017 3:03 pm
Currently Drives:: Megane 250 RenaultSport Lux & Cup Pack Race Yellow
Location: Southampton

Re: Juddering at full throttle

Postby charliehoward » Sun Aug 20, 2017 11:47 am

I was going to replace just the misfiring set but I've seen it personally on cylinder 1 so today I'm just going to change the lot, will update you after!

charliehoward
Passed Theory
Posts: 35
Joined: Mon Jul 17, 2017 3:03 pm
Currently Drives:: Megane 250 RenaultSport Lux & Cup Pack Race Yellow
Location: Southampton

Re: Juddering at full throttle

Postby charliehoward » Sun Aug 20, 2017 1:40 pm

It's fixed! Just the ignition coils.

charliehoward
Passed Theory
Posts: 35
Joined: Mon Jul 17, 2017 3:03 pm
Currently Drives:: Megane 250 RenaultSport Lux & Cup Pack Race Yellow
Location: Southampton

Re: Juddering at full throttle

Postby charliehoward » Sun Aug 20, 2017 6:44 pm

So it's mainly fixed, I do need to replace one of the oxygen sensor circuits as I'm still getting error code P0136, does anyone know where that is located?

BrotherPlasterer
Just Passed
Posts: 116
Joined: Sat Jul 02, 2016 10:09 pm
Currently Drives:: 2005 Renault Megane 2 1.6 VVT Dynamique

Re: Juddering at full throttle

Postby BrotherPlasterer » Wed Aug 23, 2017 8:58 pm

In the exhaust, approx at the end of door. Can't miss it.

Check the wires first because they are a bit exposed.

Easier to get a garage to do it though, they can get welded in due to the heat apparently.

I would check the voltages first however, on your odb thing if possible. It should be capable of reading the O2 voltage from the ECU, if it flat lines below 0.45V then it's possibly kaput.
Did you reset the error codes?

Have you tried the old, "turn it off/on again" trick by disconnecting your battery overnight. Long shot this one!


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