[mattbecker]

I posted a topic recently regarding part throttle engine hesitation I still have the same issue. MAF has been changed and it is not the coil packs as it does not happen during full throttle applications. Fed up with taking it to VW as they are clueless. Has anyone had any issues with oxygen sensors(Lambda sensors), it could be that the sensor is switching slowly or any other experiences?

 

[Zeus]

does it do it from cold? i don't belive the lambda is even operational until the engine has reached a certain temp.

 

[mattbecker]

Quote: posted by Zeus on 10/01/2005 14:53:47

does it do it from cold? i don't belive the lambda is even operational until the engine has reached a certain temp.

It does do it from cold

 

[dazzer-b]

so whats happening exactly when you put your foot down does it stutter like there is a blockage somewhere, if so i have the same trouble and i have checked everything.

dazzer

 

[TurboMatt]

i think i am having some problems like that somewhere down the line

have you cleaned all your sensors and switches that you can get at with electrical contact spray

to be honest i would of thought it would of been the maf but seeing as you have replaced it then i aint sure

another VW mystery

 

[simch]

Have you had new plugs recently. Chnage them, it makes a big difference.

Is the car std or chipped etc?

I would take it to one of the specialist tuners with a rolling road, they will just hook up the diagnostics and drive it on the rollers, recreate the problem and then diagnose it. Simple!!

Dealers are not there to do anything other than run of the mill stuff, and you will be forever tryingt o find it by trial and error. If you are in Norwich, (and the guy in Lincoln) try Jabbasport at Crowland nr Peterborogh. Not too far away, they have all the toys, and a rolling road, and their labour rates would emabarrass any main dealer!

 

[TurboMatt]

do you reckon it is worth my takin a trip to jabba then, thats if my car will make it and i can stand it beeping and flashing at me for over an hour, i mean i am stil havin probs with my oil warning light goin off after half hour,

also the new clutch is playing up and they might have a better knowledge of it then me

and of course the revs

or do you reckon a specialist in lincoln ?? obvioulsly i will get a quote tho

 

[simch]

Give them a call, bt it sounds lie youb have some major probs.

Some probs may be connected. Is yours a std car??

 

[TurboMatt]

yeah it is mate standard apart from dv but ive had that ages

 

[simch]

I would give Mike at Jabba a call, and talk him thru your probs. If you can get it on some rollers, with a good operator, they should find at least the nature of the hesitancy or misfire, ie fuel, ignition etc, and then be able to sort it out. I would have a good look at all your wiring harness in the engine bay, check there is no wiring chaifing against each other or anything else, then also check your battery teminals are tight, and th battery is secure, ie not moving about. may be electrical. Also check all the vacuum hoses, the small bore hoses on th top of the motor under the cover, and to the dv etc. Any deterioration of these can cause havoc with fueling and boost pressures.

 

[Richy_50pence]

you can be months trying to find out, I had some problems before and called in to see my local guy who has a basic diagnostics kit, he didnt charge me to have a look [] but he only normally charges ?25 to have a look and tell you what comes up!

Your local mechanics college may even have some sort of testing stuff, my local one does and they will do it for free because they do it as a demonstration!

I always go EASY first, and get lucky 4/5 times!

 

[mattbecker]

Quote: posted by Richy_50pence on 10/01/2005 23:24:40

you can be months trying to find out, I had some problems before and called in to see my local guy who has a basic diagnostics kit, he didnt charge me to have a look [] but he only normally charges ?25 to have a look and tell you what comes up!

Your local mechanics college may even have some sort of testing stuff, my local one does and they will do it for free because they do it as a demonstration!

I always go EASY first, and get lucky 4/5 times!

My car is completely standard. the description of the problem is acceleration in any gear using approximately 30% throttle the car surges back and forth i.e. it is hesitant to accelerate, quite sutterly but once you tune into it it is extremely annoying. It will do it both cold and hot. CLive Atthowe in Norwich has had a look at it and he could not find anything wrong with it apart from the MAF signal was a tad low so he changed it but the problem is still there. I took the car to VW mid last year and their lead technician told me they all do that, hence why I do not want to take it back their! I have access to diagnostic kit(Lotus) which I have hooked up to the car and there are no fault codes the only thing that looked slightly unusual was the 02 sensor switching seemed a little slow.

 

[mitch30]

I've had some similar problems in the past with my 1.8T (unmodified).

The symptoms were when the car was driven from cold (and in the wet) the main problems were misfiring, hesitation, stalling, flat spots, and an unstable idle which most noticeable when driving around town at low speed regardless of whether the engine was hot or cold. When I drove the car hard the problems were much less noticeable.

The Stealers changed the MAF, which improved things but only very slightly and cost me quite a few quid. I took it back and then they decided to clean the throttle body with some brake/carb cleaner. It took them 10 minutes and so far the car has been running like a dream. And the bonus was they didn't charge me a penny. Must have been my lucky day.

Worth a try, if you've not already had in cleaned.

 

[dazzer-b]

am i able to clean the throttle body im not that mechanically minded but can do most things if i have instructions in front of me.

so far i have changed the turbo (twice), spark plugs, air filter, coil packs, maf, dump valve. had this problem since january.

 

[TurboMatt]

it only one bolt, allen key head 5mm i think, engine cover off first, pull off the switch and unbolt it its on the inlet, cant miss it

 

[simch]

Quote: posted by mattbecker on 11/01/2005 10:10:14

Quote: posted by Richy_50pence on 10/01/2005 23:24:40

you can be months trying to find out, I had some problems before and called in to see my local guy who has a basic diagnostics kit, he didnt charge me to have a look [] but he only normally charges ?25 to have a look and tell you what comes up!

Your local mechanics college may even have some sort of testing stuff, my local one does and they will do it for free because they do it as a demonstration!

I always go EASY first, and get lucky 4/5 times!

My car is completely standard. the description of the problem is acceleration in any gear using approximately 30% throttle the car surges back and forth i.e. it is hesitant to accelerate, quite sutterly but once you tune into it it is extremely annoying. It will do it both cold and hot. CLive Atthowe in Norwich has had a look at it and he could not find anything wrong with it apart from the MAF signal was a tad low so he changed it but the problem is still there. I took the car to VW mid last year and their lead technician told me they all do that, hence why I do not want to take it back their! I have access to diagnostic kit(Lotus) which I have hooked up to the car and there are no fault codes the only thing that looked slightly unusual was the 02 sensor switching seemed a little slow.

Mattbecker, that sounds like the advance bouncing off the knock sensor, its not a misfire as such, it just sort of "pulsates" the power delivery, rather than it being smooth?

This could be an ECU issue, but is more likely a crank sensor or knock sensor issue. Again, get it on a specialist rolling road, they will see it hapening in real time and set about curing it.

 

[simch]

Again, gysa rolling road and diagnostics is the way to proceed IMO! You can get a roller check and power run/ diagnostics for about 30-40 quid. Well worth it to sort these ongoing or intermittent problems.

 

[kold-fusion]

I've got some simliar issues with my 01 GTI 1.8T 20V... I've been dealing with it for roughly a week now. I'll start the car and it will idle fine for about 10 seconds then start dropping down to 400-500 rpms doing all it can to not stall and you can really notice the car rocking it will do this till it stalls, it dosen't catch itself and bring the rpm's back up, when I'm actually driving it's not bad, sometimes when I come to a stop in a intersection it'll start doing it, then I get it up to like 2 grand and then let it come back down to idle rpm's then start to go... It got so bad once the check engine like came on (go figure) I put some injector cleaner in it and it ran fine for a few hours and the check engine light went out but not it's doing it again. I'm going to take the advice and get the throttle cable taken care of. I JUST bought this car, paid a good penny for it too. I had a mechanic lose a scan tool due to the fact I have an aftermarket CD player in there so I have to take that out and put the factor Radio back in. Big pain in my ass... I love VW mystery's...... Any ideas guys, let me know.

Thanks