aerocorey Posted December 22, 2008 Share Posted December 22, 2008 My boost diaphragm is bad. It's smoking and revving up on its own. It's getting worse. I can't afford to park it and leave it until I can get a new boost diaphragm. Can I unplug the hose going to the turbo, plug it, and drive it? Quote Link to comment Share on other sites More sharing options...
Lars L Posted December 22, 2008 Share Posted December 22, 2008 I suppose you can, but there will be no signal to the pump that you want more fuel with rising boost. But it's knackered anyway, so why not. I would plug both ends, to avoid fuel escaping from the pump. Well, I don't exactly know how it works... Quote Link to comment Share on other sites More sharing options...
Snagger Posted December 22, 2008 Share Posted December 22, 2008 You can remove the boost line to the pump. You can't plug the end connected to the turbo because a bung would be forced out, but plugging the port on the pump will prevent dirt ingress. fuel doesn't go near the diaphragm, so don't worry about fuel leaks. Quote Link to comment Share on other sites More sharing options...
aerocorey Posted December 23, 2008 Author Share Posted December 23, 2008 You can remove the boost line to the pump. You can't plug the end connected to the turbo because a bung would be forced out, but plugging the port on the pump will prevent dirt ingress. fuel doesn't go near the diaphragm, so don't worry about fuel leaks. I unplugged it. Fuel comes out of the boost line when it's unplugged. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted December 23, 2008 Share Posted December 23, 2008 Shouldn't be fuel coming out of it I'm afraid. Les. Quote Link to comment Share on other sites More sharing options...
aerocorey Posted December 23, 2008 Author Share Posted December 23, 2008 Shouldn't be fuel coming out of it I'm afraid.Les. I figured that out. What do I do to fix it? I read your boost diaphragm how-to. That's what I'm planning to go with since I've also got pressure in the fuel tank. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted December 23, 2008 Share Posted December 23, 2008 For some odd reason I thought you had a 200TDi - sorry There will be fuel coming out of the boost pipe if the diaphragm is split - it will be pushed up the wastegate actuator pipe and then into the turbo, where it will enter the engine - causing wierd things to happen. I think there will be only spill rail pressure in the pipe, so unplug it from the turbo end and plug it (a 5mm bolt will fit I think - the pipe internal I/D is 4mm I think). You'll have no turbo, but then you wouldn't have had since the diaphragm split anyway. Fuel consuption will go up - mainly because it's in effect now an N/A engine and you'll be gearchanging more than normal. Les. Quote Link to comment Share on other sites More sharing options...
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