my first g60 running probs

[welshlee 10]

rite ive owned this car for 11 months now always been reliable even drove well.

after fixing boost leaks i was getting 14/16 psi

took the car last weekend to retro car show and drove fine ther and back but sluggish

then got almost home then started to backfire on throttle and engine would die

then i would have to slam the throttle to the floor and it would pick up again

soon as i came off throttle then give it some gas it dies again till full throttle

only seems to do this when the cars warm.im also only seeing about 10 psi at 4 rpm

even sounds flat and a flat spot if i rev the car and a backfire and my cat smells like its working to hard

stinks eggy.im thinking its either the dizzy or fuel pump.

i just changed new vw blue sensor. changed coil, also new ecu vacum pipe.fuel filter a few months ago

i also changed knock sensor a month ago not a new one but one off my passat 20v turbo.

its the same lenth and same three pin plug. anyone got any ideas as its doing my head in

and worried im going to be stuck somewhere.

[daleyboy 0]

Have you tried another MAF sensor ?

[welshlee 10]

Have you tried another MAF sensor ?

 

no it doesnt have a maf sensor as its a g60.

 

cheers

[daleyboy 0]

no it doesnt have a maf sensor as its a g60.

 

cheers

 

Whoops, well i have never had a G60 thats my excuse and im sticking to it..................

 

So the dizzy has a vacuum pipe which advances the timing ? Its been a while since i had a car with a dizzy but the Audi i had had a vacuum pipe which would advance the timing with engine speed.

 

A backfire normally indicates timing issues, so i would look at the dizzy as you say.

 

Your fuel pump, wouldnt that just starve the car of fuel at peak demand ?

[steveo29 0]

So the dizzy has a vacuum pipe which advances the timing ?

 

doesnt have that either lol

[daleyboy 0]

doesnt have that either lol

 

Oh, i think im gonna leave this to someone who knows what they're on about............ :tumbleweed:

[owen g60 10]

Things that spring to mind are stuck stability valve or split/ too short ecu vacuum pipe

[Rustynuts 0]

Unplug the lambda sensor and see if this makes any difference.

[welshlee 10]

Things that spring to mind are stuck stability valve or split/ too short ecu vacuum pipe

 

 

 

ecu pipe is fine. new one fitted. found a bad wire near lamda. i fix the wire but still the same

wheres the stability valve too, also i noticed the getting sluggish a while back

and it only sometimes gave a small backfire and it would be fine then.

if rev the car only up to 2/3k in small revs if feels sluggish and pops like its running out of petrol

if i rev it full throttle it revs a little slow but no backfire.

does anyone know if the hall sensor in the dizzy plays up how the car acts.

think il also change the lamda.

checked all injector wires,dizzy wires. sensor wires.checked all boost pipes.

also if i hold the wot switch the revs go up and revs nice.

[Sam.l 0]

Had similar sounding problems, though it didnt cut out, just unnaturally sluggish under throttle. Turned out to be a crack in the small rubber pipe off of the left hand side of the inlet manifold to the fpr. Not sure if thats worth a look at?

[Rustynuts 0]

Still unplug lambda, only two seconds and it will or will not rule it out.

[welshlee 10]

i fitted a new pipe to the fpr and seems ok .i did unplug the lambda to day but seemed the same but i repaired

a wire so will check it again now wires fixed

[Rustynuts 0]

By the sounds of things it is not the lambda then.

[welshlee 10]

took car for a spin today.it does run a lot better and boost better but did die

one for a second but goes if a full throttle it but still sluggish pulling off

took a look at the timing then and cant make it out

the flywheel lines up ok and rotor arm point to number one but my cam marks are

not the same as the ones on other g60s i don't have the two tots at the front

or a single dot at the rear i have a line at the the rear that's half a tooth off

also my dizzys and rotor arm are not pointing same as the pics on the timing thread but on

number one and not far away

the cam dots are the ones bothering me me most.but cant be that far out as starts on the button

everytime.

[dannyboy 0]

you need to use a timing gun for the dizzy,the rotor arm pointing at cylinder one is just to get rough timing.You need to set the timing on the dizzy dynamicaly.have u checked the dizzy or cap isnt loose?

[welshlee 10]

yes a new cap a few months ago. i rechecked the timing and timed it up on the front pulley marks

and it seemed a tooth out up one tooth.i moved it up a tooth and turned engine over by hand a

few times then recheck and all looked ok.the timing is spot on set at 6 deg.

took car for a run and drives ok but the problam was still there

then checked the first throttle switch and it was stuck in and only clicked a few times

so i cleaned it up and sprayed it with a bit of oil and clicks everytime.

took car out for a couple of runs ans seems fine,boosting well again

but feels like the timing needs to be advanced a little otherwise all great again

and a free fix.

cheers to all who helped

[owen g60 10]

Didn't think of the idle switch causing the issue.

 

If it is stuck you will get some terrible misfires when you try to go to wot

[welshlee 10]

only by chance i found it. i take it that it must send a signal to the ecu. i am only guessing mind

seems a lot smoother when in low revs too.