Slobbo 0 Posted January 30, 2011 Hi guys. I have a VR6 2.9 in my Transporter Syncro (out of the Corrado) and have been having problems with VAG-COM reporting the following errors. 00281 vehicle speed sensor G68 00518 Throttle position sensor G69 I have cleaned up the throttle body (black with crud) and the Vehicle speed sensor error has gone but I still had the Throttle Position Sensor error coming back so I stripped out the Idle Stabilisation Valve and cleaned it with carb cleaner. It too was black with crud. When I put it all back together the error is gone (although I haven't run it enough to be sure) BUT the car is now idling up at 1300rpm. When I first started it, it was revving at 2000 rpm. I cleared the codes using VAG-COM and it dropped to the 1300 rpm. Now when I start the van (hot or cold) it instantly jumps up to about 1300 rpm. Any ideas? Could the ISV be goosed? Is there something I need to do after cleaning up the ISV with VAG-COM? Help? Quote Share this post Link to post Share on other sites
boost monkey 0 Posted January 30, 2011 isn't the TPS a little sensor on the side of the throttle body? Don't know much about the VR intake but I'm sure someone else will chime in soon enough. Quote Share this post Link to post Share on other sites
AlgarveVR6 0 Posted January 30, 2011 vr6 in a t4 thought about doing that with mine make sure the isv is moving freely. if it was full of shit then possibly something stuck in it don't worry about speed sensor, always shows when not running. possibly throttle body need cleaning too ? Luck dude Quote Share this post Link to post Share on other sites
Slobbo 0 Posted January 30, 2011 Yep sure is. I have bought a new body with the sensor (new sensor is about £60) but came across some info on the net which talks about the ISV causing problems like I have been having hence the strip down of the ISV. It was black so I held high hopes of a fix. Quote Share this post Link to post Share on other sites
Slobbo 0 Posted January 30, 2011 Yeah it is moving freely. I am wondering if the garage have tightened the throttle cable when it was in last (they were messing about up the front) so it is set too high now the valve is clean and working properly (seems remote though). The engine is in a T3 Syncro. This is my bad boy. Quote Share this post Link to post Share on other sites
boost monkey 0 Posted January 30, 2011 have you tried soaking the ISV in carb cleaner / thinners / petrol overnight or for a long time? that can work wonders if you've just been spraying it through and attacking with a brush. Yes, 1.8 16v owners know all about the pain associated with bad ISVs! Quote Share this post Link to post Share on other sites
Slobbo 0 Posted January 30, 2011 Will give the soaking idea a go. Thanks Quote Share this post Link to post Share on other sites
RW1 0 Posted January 30, 2011 don't worry about speed sensor, always shows when not running ???? That's code 00513 that shows when stationary! COM reporting the following errors. 00281 vehicle speed sensor G68 Thats the speedo drive cicuit. Sender on top of the gearbox faulty or the wiring. Speedo dancing about at in the past or been disconnected. If it cleared and stayed clear, forget it and re-check in a months time. 00518 Throttle position sensor G69 As said the unit on the side of the throttle body. Not cheap £61.52 + VAT. Either open circuit or a short internally. Also check connection at the TPS and associated wiring for internal break due to damage/kink. Also check the throttle cable isn't binding and it is fully shutting. . Quote Share this post Link to post Share on other sites
Slobbo 0 Posted January 30, 2011 don't worry about speed sensor, always shows when not running ???? That's code 00513 that shows when stationary! COM reporting the following errors. 00281 vehicle speed sensor G68 Thats the speedo drive cicuit. Sender on top of the gearbox faulty or the wiring. Speedo dancing about at in the past or been disconnected. If it cleared and stayed clear, forget it and re-check in a months time. I haven't got one of these. Don't know how it was done on my setup as it uses the Syncro gearbox rather than the Corrado. Will keep an eye on it. Will it affect fuelling/performance? 00518 Throttle position sensor G69 As said the unit on the side of the throttle body. Not cheap £61.52 + VAT. Either open circuit or a short internally. Also check connection at the TPS and associated wiring for internal break due to damage/kink. Got another one coming. Will swap it and see how it goes. Also check the throttle cable isn't binding and it is fully shutting. .[/quote:2lzzdar3] Quote Share this post Link to post Share on other sites
RW1 0 Posted January 31, 2011 Speedo fault won't affect fuelling / performance. . Quote Share this post Link to post Share on other sites
Supercharged 2 Posted January 31, 2011 Doesn't the throttle angles just need re-calibration after the work? Quote Share this post Link to post Share on other sites
RW1 0 Posted January 31, 2011 Doesn't the throttle angles just need re-calibration after the work? Yes, Basic Settings as per second half of the ECU Reset proceedure should be applied. . Quote Share this post Link to post Share on other sites
boost monkey 0 Posted January 31, 2011 The vehicle is from 1987. Surely the speedo cable is more likely to be mechanical like my one. Quote Share this post Link to post Share on other sites
RW1 0 Posted January 31, 2011 Well that is what I thought when looking at the instruments on ETKA late last night, think it would think be so. Just a thought, if the VR6 ECU can't see a speed sender, that would generate a fault, but it should have returned after being cleared. ????? . Quote Share this post Link to post Share on other sites
Kevin Bacon 5 Posted January 31, 2011 All the ECU needs to know is the throttle angle at rest is or As soon as the ECU sees 16 degrees, it comes out the idle maps and loads the driving ones. Many people tamper with the throttle stops in an attempt to fix idling problems, which is the wrong thing to do. It's why VW 'seal' the screw with yellow resin paint so that they know it's in the right position. If the paint is cracked / missing, they know someone's been 'having a go' and not a vehicle fault. Stalling at the lights is a common thing on VR6s and very rarely is it idle valve related. The Bosch 0280 140 512 is an extremely reliable valve, used on my cars, Cavaliers, Vectras, Saabs, Volvos, Audis etc etc. It's a petrol engine at the end of the day and if the fuel mixture isn't right coming out of over-run and into idle, it will stall just the same as any other petrol engine in that scenario. It's usually always the MAF (assuming nothing else has been tampered with / broken), but unfortunately OBD1 does not measure it's output, so it's very difficult to diagnose. What can help is winding the dashpot out further to catch the throttle quadrant earlier, thereby giving the ECU more time to adapt the fuelling to prevent a stall. Quote Share this post Link to post Share on other sites
Slobbo 0 Posted January 31, 2011 This engine has been in for a good while and has been running well until recently. I have ordered a new ISV and a supposed good throttle body with TPS. I will change the ISV first and see if it makes a difference then the TPS to see if it clears the TPS error. I also have a second hand MAF I can swap if neither of these things work. I will also check to see if the garage have over tightened the mechanical cable as they had to disconnect it to swap my bushes on the front suspension. When I picked up the van the first time they had not put the cable back in correctly and I didn't have any throttle at the top end so I am wondering if they over tightened it with the ISV faulty and now it is clean (and working correctly) the car is over revving at idle. Just a thought does this logic seem correct? Quote Share this post Link to post Share on other sites
Supercharged 2 Posted January 31, 2011 I'm still not sure anything is actually faulty here... I assume you are using the original syncro gearbox with speedo cable - if so that explains the speed sensor fault. The TPS needs settimngs up - have basic settings been done?? Quote Share this post Link to post Share on other sites
Slobbo 0 Posted January 31, 2011 I got the how to for doing the basic settings from the VAG-COM site but it doesn't have instructions for a mechanical cable with an ISV. Only mechanical without an ISV. If it needs resetting how do I do this? Quote Share this post Link to post Share on other sites
RW1 0 Posted January 31, 2011 If it needs resetting how do I do this? Which ECU VW part number have you got fitted? . Quote Share this post Link to post Share on other sites
Slobbo 0 Posted January 31, 2011 Can't check till the weekend. It is the ODB1 ECU but couldn't give you the code until I check at the weekend. Quote Share this post Link to post Share on other sites
Supercharged 2 Posted February 1, 2011 If you've got a txt output from VAGCOM on file then this will show the ECU part number... Quote Share this post Link to post Share on other sites
Slobbo 0 Posted February 18, 2011 Right. Have sort the ISV problem. Ended up with a new ISV and a new Throttle Position Sensor. Made sure all the pipework was leak free and it was running lovely briefly. Took it for a run to St Andrews and ended up with different problem. This time the engine dies when you dip the clutch or pull up at lights. Difficult to start as well without putting your foot on the accelerator. VagCom is giving me this. riday,18,February,2011,11:21:48:63310 VCDS Version: Release 10.6.3 Address 01: Engine Labels: 021-906-258.lbl Control Module Part Number: 021 906 258 AG Component and/or Version: MOTOR PMC 3 Software Coding: 0261203109 Work Shop Code: 1267357531 VCID: 59B744A2E99F 4 Faults Found: 01265 - Exhaust Gas Recirculation Valve (N18) 31-00 - Open or Short to Ground 00281 - Vehicle Speed Sensor (G68) 27-00 - Implausible Signal 00537 - Lambda (Oxygen Sensor) Regulation 08-10 - Control Limit Surpassed - Intermittent 00758 - Secondary Air Injection System (AIR) 31-00 - Open or Short to Ground Readiness: N/A Not concerned about the EGR fault as I don't have an EGR. Any ideas? Quote Share this post Link to post Share on other sites
Slobbo 0 Posted February 18, 2011 Right the high revving problem is sorted. New ISV and Throttle position sensor along with a good clean and check for leaks and all good.....for a while. Now I am getting problems with stalling when the clutch is dipped or when you pull up at lights etc. It is difficult to start as well. VagCom output is riday,18,February,2011,11:21:48:63310 VCDS Version: Release 10.6.3 Address 01: Engine Labels: 021-906-258.lbl Control Module Part Number: 021 906 258 AG Component and/or Version: MOTOR PMC 3 Software Coding: 0261203109 Work Shop Code: 1267357531 VCID: 59B744A2E99F 4 Faults Found: 01265 - Exhaust Gas Recirculation Valve (N18) 31-00 - Open or Short to Ground 00281 - Vehicle Speed Sensor (G68) 27-00 - Implausible Signal 00537 - Lambda (Oxygen Sensor) Regulation 08-10 - Control Limit Surpassed - Intermittent 00758 - Secondary Air Injection System (AIR) 31-00 - Open or Short to Ground Readiness: N/A Not worried about the EGR error as I don't have an EGR hence the error. Any ideas Quote Share this post Link to post Share on other sites
