fatboyjon 0 Posted August 26, 2008 Report Share Posted August 26, 2008 Hi guys,Got a bit of a problem where the idle bounces up and down when sat stationary, then also when in second gear the car will drive itself and get at 2000rpm! (which was cool for around town, but worrying non the less) After it stops bouncing around and sort of settles to just under 1000rpm, if you come to a sudden stop or slow down quickly the engine cuts out, then have to turn her over to get running again. I have tried removing the negative lead from the battery as suggested and left it for over an hour and reconnected it but with no avail.I recently changed plugs, leads, coil pack, the ecu malfunctioned so I managed to get second hand one which has run fine for 2 months. There is no power loss at all, as when the hammer is dropped it springs into life, but slow end is really erally wierd. I have put a video up on (sorry for the crap sound off my phone but u can hear it at standstill moaning up and down.Any thoughts?!! Air Mass Meter? (other than a vag com, cos i dont have one! - sure it can be arranged tho)cheers,Jon. Link to post Share on other sites
mike 6 Posted August 26, 2008 Report Share Posted August 26, 2008 yea MAF meter springs to mind.. does sound like a breathing problem to me.. cleaing throttle body might be a worthwhile execise? Link to post Share on other sites
fatboyjon 0 Posted August 26, 2008 Author Report Share Posted August 26, 2008 Thanks Mike,I have been reading up and saw a few threads when peeps have been cleaning the throttle body they had a similar issue with the revs going up and down and had to get ecu checked with vag com. Would it be a good idea to disconnect battery if im playing?Any other thoughts would be great if Im taking stuff apart Link to post Share on other sites
fatboyjon 0 Posted August 26, 2008 Author Report Share Posted August 26, 2008 ps any instructions on how to take throttle body apart? Im not totally engine retarded just would like not to guess and brake stuff! Link to post Share on other sites
VR6_Absy 0 Posted August 26, 2008 Report Share Posted August 26, 2008 Sounds a bit like MAF but could be ISV clogged up. Just done mine as it would struggle to start and then constantly run at aba 1200 rpm on tick over. All done seems fine now.When you reconnect try leaving it for aba 20 minutes on ignition lights Link to post Share on other sites
swaper 0 Posted August 26, 2008 Report Share Posted August 26, 2008 i had a similar case in my VR, but in addition, when the gas pedal was released, the engine went off ( sometimes). When i replaced the idle stabilizer ( a round thing with a red plastic all over hiding a spring ) lying beneath the throtle everything was OK. Additionaly , i replaced also the TPS .... Now, once a day, when the engine reaches appr 2000 rpm, there is a lack of power ( like switching off the engine ) , for 5 seconds !!!! I cannot solve this !!!! Link to post Share on other sites
swaper 0 Posted August 26, 2008 Report Share Posted August 26, 2008 Sorry for my English ..... Link to post Share on other sites
mike 6 Posted August 26, 2008 Report Share Posted August 26, 2008 i just had a thought, i disconected my batterery when i had a faulty ecu and it it was cutting out with simlar simptoms, it settled eventually but ecu had to relearn or something.... Link to post Share on other sites
swaper 0 Posted August 26, 2008 Report Share Posted August 26, 2008 I am thinking of something different that i have to find out :In my VR, there's oil leaking from my V9F S/C, directly into the MAF sensor, additionaly there's always oil drops into the intake .... Maybe this "dirty" situation causes all above .... Link to post Share on other sites
VR6 VDF 0 Posted August 26, 2008 Report Share Posted August 26, 2008 ive had that bouncy idle on two different VAG cars now, I cleaned the throttle body and the MAF with contact cleaner and both times the problem was solved. Link to post Share on other sites
swaper 0 Posted August 26, 2008 Report Share Posted August 26, 2008 Thanks mate !!! You are giving so much hope !!!!! Last night i was affraid of a Porsche Boxter S standing besides me .... I hate that feeling !!!! Link to post Share on other sites
Dodson 0 Posted August 27, 2008 Report Share Posted August 27, 2008 hi guys i have exact same problem, im trying to understand what the solution is though!Mine has good days and bad days, but the idle is ridiculus and bounces up and down and then sometimes sits at 1500 rpm, V annoying!!How do you clean throttle body?? Link to post Share on other sites
fatboyjon 0 Posted August 27, 2008 Author Report Share Posted August 27, 2008 thats a good question! I think we need a manual, har har new MAF's are £50 odd quid from GSF (wether its the right componant when you open it out the box when you get home tee hee) Link to post Share on other sites
Dodson 0 Posted August 27, 2008 Report Share Posted August 27, 2008 have you tried anything on yours yet to solve it mate? Link to post Share on other sites
fatboyjon 0 Posted August 28, 2008 Author Report Share Posted August 28, 2008 nah its my day off tomorrow, gonna take the filter off and check the maf out, hopefully its oiled up like a good'n thats what Im hoping for anyway!!! Will let you know after I have had a go Link to post Share on other sites
Dodson 0 Posted August 29, 2008 Report Share Posted August 29, 2008 thanks mate, i await with baited breath lol Link to post Share on other sites
fatboyjon 0 Posted August 31, 2008 Author Report Share Posted August 31, 2008 hmm still not solved! I replaced the pipe that goes from the MAF to the throttle body (as it needed replacing anyway) Also managed to clean in and around the throttle body and put it all back together. Checked the MAF and didnt seem to be dirty at all. Acceleration may be a little more responsive (not sure if thats just my mind telling me this!) but the car still bounces , but not all the time, also it still cuts out. When I was in 4th and dropped off the gas to change it cut out! That was a one off I think I dunno.. I think I need to get a VAGCOM check. I have noticed tho that when I start the car the left hand lcd display reads 1002 ???Cant get the links to work! http://www.jonrayner.co.uk/pictures/1.jpghttp://www.jonrayner.co.uk/pictures/2.jpghttp://www.jonrayner.co.uk/pictures/3.jpghttp://www.jonrayner.co.uk/pictures/4.jpghttp://www.jonrayner.co.uk/pictures/5.jpgAny more Ideas much appreciated. Link to post Share on other sites
Roan 0 Posted August 31, 2008 Report Share Posted August 31, 2008 Your car looks OBD1? If so then I think you need to clean the ISV as well as the main throttle body assembly. You will also need to perform a throttle body realignment on VAGCOM (search and there is some info on ROSS-TECH.HTH Link to post Share on other sites
Dodson 0 Posted August 31, 2008 Report Share Posted August 31, 2008 if its started cutting out isnt this the crank position sensor?? Link to post Share on other sites
Dodson 0 Posted September 7, 2008 Report Share Posted September 7, 2008 Well mine is Coilpack, got big crack in it easy fix now identified though Link to post Share on other sites
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