Has anyone any suggestions for me? PD130 I have removed the combined EGR and anti-run on choke, replaced it with an Allard straight through pipe and the engine now usually takes longer to start when hot. Has to be turned over for a good few seconds before firing up instead of being pretty much instant as before N75 valve pipes are plugged and the engine has run really well for the last few thousand miles but has this issue of having to be churned over when hot. Cold starting is always still instant Help?
when my egr decided to stick open on the pd130 the car was practically impossible to start, that was the main symptom i dont understand how yours would be harder to start without an egr though
Could just clean out the EGR and put it back on? That flap is a good defence in the event of a run away
Removing the egr will not cause a hot starting fault as such because there,s now no air shutter of valve because is been removed There is one test when the vehicle is warm disconnect the maf and see if it starts ok. Also check the injectors as well
It could be unrelated to the EGR removal. Have you got access to a multimeter? You could resistance check the coolant temperature sensor, this could cause a warm starting problem. Might also be worth a fault code read
With the multimeter set to ohms.. At 0 *C 5000-6500 ohms 10 *C 3350-4400 ohms 20 *C 2250-3000 ohms 30 *C 1500-2000 ohms 40 *C 900-1400 ohms 50 *C 700-950 ohms I'd just check it at a couple of different temps (one of them can be the outside temperature!)
Finally discovered my hot starting problem If you search the internet for "Hamman mod TDI warm start" all becomes apparent Some of the earlier TDIs have defective ECU mapping. At warm and hot temperatures there is no fuelling map at low revs. If the engine is above 70 degrees, then there is no fuelling map below 280rpm. The engine doesn't fuel until the ageing starter motor/battery gets the engine above 280rpm My 2002 car seems to suffer the problem. I have seen a map published for a 2003 Beetle where the map had been fixed. My car has responded to a new battery and tightening the heavy load cable from the underside of the starter solenoid into the starter, turns over slightly quicker and now starts quickly again when hot. I didn't need to resort to the "hamman mod" which is to insert a 2000k resistor in-line withe the temp sensor wired to only be effective via a relay during starter operation, so tricking the ECU into thinking the engine is cooler, then triggering an incorrect map for starting a colder engine but at least allowing it to start
