Jerking / Kangarooing holding back @ high rpm - 1.8T

Cheers Neil

I've already changed the ignition amplifier for a genuine one.

The problem I'm trying to solve at the moment is the cam sensor error which keeps coming up on the scan ?

I'm thinking its the cause of the poor running, but won't know until I actually sorted this out first.

Getting fed up with it tbh

 

Both really Lewis.

Today I drove it round the block after the clearing the codes and doing the above checks. Upon returning and re-scanning, the code was back.

Does the same when left ticking over too. Code instantly flags up.

 

but its only been doing this from fitting the new intake?

would a map sort this... thinking maybe the mixture of fuel and air are out hence why its messing around at higher revs.. but no idea why your getting it at lower revs.

pain in the bottom i know but what happens if you fit your old intake back on.. still the same faults?

 

I can't remember it happening beforehand, but with the new intake fitted I was giving it some and instantly noticed the problem.

Eddie was about to map my car a month or so ago, but when he scanned it he noticed that the barometric sensor was missing and the cam position sensor was showing up a fault code.

So I went home, fitted the barometric sensor, and changed the cam position sensor, but after another scan by me, the cam position sensor was still throwing up the 00515 error code ?

Fitted the new intake, went for a drive and noticed the holding back at HIGH revs.

And I'm now where I am now, after doing all the above tests

Could be running the wrong air / fuel mixture.

A couple of the spark plugs were black.

 

did you ever find out if the agu cams had a differnt cam pick up, also have you locked of the vvt? i think you have to do something with it when using agu management

i could be wrong about the last statement but im sure ive read something about it before

 

Yeah I had someone search the part numbers for the different cam wheel trigger's on ETKA, and they were showing as the same. I also compared it to the cam trigger wheel on my spare (blown) AGU cylinder head, and its identical.

Regarding the VVT, its currently sitting there unplugged on my AUM head.

I suppose i could swap the AGU chain tensioner over to my AUM head. Are these easy to swap over ?

 

think you need remove the cams to do it but im not 100% sure its been a while sice i stripped a 1.8t head

 

Nooooooooooooo The dreaded 16 rollers between timing marks again !!

As I'm off work tomorrow I might give this a shot.

 

Off work today and hoping to get to the bottom of this.

Any more suggestions welcome

 

http://www.audi-sport.net/xf/threads/1-8t-holding-back-please-read.200290/

Just had a read of this.

I know its an A3 1.8T, but the last person to post on that thread said the intank pump was at fault.

Obviously it won't solve my 00515 camshaft error, but it could cure the violent holding back @ high rpm ?

Worth a try at 20.

Not sure what else it could be ?

Might be worth trying another ECU to see if that's the problem ?

Maybe we got the cam timing wrong when refitting the new valves ?

 

Have you actually checked operation of the sensor? You need to check for voltages.

If it has voltage and signal changes then it's an ECU fault.

http://youtu.be/yeqzE_eNlio

[video=youtube_share;yeqzE_eNlio]http://youtu.be/yeqzE_eNlio[/video]

 

Cheers Russ, will give that a go tomorrow

 

Right then.

With ignition on and with the cam sensor plugged in, I'm getting these readings.

* Signal -



* Positive -



- With engine running and cam sensor plugged in, I'm getting these readings -

* Signal -



* Positive -



With the plug removed from the cam sensor, i tested the signal from the ECU, which was giving a higher reading -




By the way, I've tested 3 different cam position sensors this morning, and they all gave the same readings as above -




So do the above readings seem ok to you guys ?

Not sure what to do next ?

 

Wheres Toyotec when you need him?

 

It's getting to a point where I've nearly had enough with this engine tbh !

But part me, as usual, wants to get to the bottom of this regardless of what's involved.

 

Plugged in with the engine running you signal should bounce from 0v to 5v.

 

Don't let it beat you... you told me not that long ago to keep the faith and I eventually found the problem.. and what a great feeling it was..

Your figure it out. Eddie back on 21st you know he would help.

Chin up

 

This is what I seem to be getting plugged in with the engine running.

[video]http://i1306.photobucket.com/albums/s569/richardmk2cgti/9F593012-0619-4AE7-BF38-E6FF316DEF55-306-000000310390A890_zpse08e5861.mp4[/video]

 

Have you checked the fuel pressure?

 

Not yet.

I have heard that a camshaft sensor that is not working can cause issues with the engine not Fueling correctly ? Is this true ?