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  1. Hi all, my 1.4 8v polo (AEX) is having some odd issues, they’re not much of a problem at the moment but want to nip anything in the bud. 90% of the time it idles fine but occasionally it’ll idle at a noticeable higher speed for 10-20 seconds and then drop down to a near stall before stabilising again. Recently I’ve also noticed that sometimes if I stall the car it’ll be very sluggish to start again, struggling at about 500rpm until I give it some throttle, it’ll run fine again after that. I’m wondering if this has anything to do with the temp sensor? It seems to heat up fine and show on the gauge but the gauge has never, ever moved past about 90, even on 5+ hour motorway trips. my other thought was the PCV valve? I often get a very oily petrol smell when stationary with the blowers on, and there’s a fair coating of oil in the air box.(level has never noticeably dropped while I’ve owned the car however) Any idea what I can do to test all these, should I even be worried? Cheers
  2. Hi I would like to ask if anyone could shed any light on the following problem which has been getting worse during the last 6 months. When cold (damp weather too) the car will cold idle badly. Driving like this will make it jump/hesitate around 1200-2000rpm any gear. It does not like the accelerator pressed too quickly. If I drive 2 miles then switch off, it will NOT start again - only turn over. Leaving it for 10-15mins it will start ok again and then idle & run smoothly. Again, once the initial problem has gone, the car runs nicely for the rest of the day. The car has new fuel filter (correct one) and new oil separator. I have tested the imp values of the HT leads and coil pack and all values seem as per std. Every year I normally remove and clean out the throttle body too with TB cleaner and toothbrush. Spark plugs seem ok (3 pin Bosch as per Haynes Manual I have bought) Air filter is new Sometimes I add injector cleaner to petrol whilst filling up. I can think of the following possibilities but would like to hear from someone with more experience, ....rather than just replacing the list of items below (expensive) 1) injectors ? 2) coolant temp sensor ? 3) clean TB again ? (last time 1yr ago) 4) coil pack micro crack in plastic case + damp weather ? (although the car is fine for the rest of the day) 5) new plugs ? 6) MAF or air related problem / TB dirty / TB idle control ? 7) anything else ? I greatly appreciate any constructive tips to resolve this relatively new problem which for the last 8 years had never occurred. Thanks Phil
  3. Polo 6N -98 1,6 AEE Hello! I'm having a problem where I have no Idle until my car is on normal temp but it only works for about 15 seconds from time to time then the engine stalls, and also my car wont start if i'm not pushing down the throttle pedal. This all happened after an electrical failure in my left hand side aftermarket headlight with crappy connectors. When i turned on the ignition all the lightning in my left hand side headlight was emitting light but very dim or low (low beam, high beam, parking light & angeleyes) so instead of turning it of i started to switch between different lighting setups (like low beam, parking lights only etc.) and on parking lights only it worked perfectly but as i switched to fullbeam my auxillary lamps wouldn't turn off, so i guess there was a short curcuit somewhere... however, as I tried to turn the engine on it just wouldn't start. The starter motor rotates, the engine rotates but it does sound like it's fairl easy to pull around and sometimes it sounds like it wants to starts so badly, like one or two cylinder/s actually ignites. VagCom returns me an error code for Idle motor/regulator so i replaced the throttlebody to a used one just now and I still have the same problem. I did however loosen the hose for the canister purge solenoid valve and then it started and idled normally but I don't think that's the problem. When you start it with the throttle pedal down and keep it at about 1000 rpm you can actually feel a vibration coming from the throttle body itself. Could actually feel it when i reved it by hand from the engine bay too. It comes from the butterfly/throttle When you turn the key to "ON" the throttlebody emitts a dim beeping noise for about 4 seconds and the butterfly makes a clicking noise both at the start and the end of the beeping sequence. The question is... Is there something else than the throttle body that controlls the engine idle? Have I completely toasted the ECU? PS. I did also have an error code on the Oxygen sensor and MAP-Sensor saying singal Intermittent but they did not return as the Idle one did after deletion.
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