Enfield 0 Posted December 28, 2006 Hello, Unfortunately I own a 205 1.8 TD... A few months back I went to a friends house and I decided to tamper with the timing screw as I had done it before but on a previous car (306 TD) with positive results. Anyway, I got lazy and got my mate to remove the nut and the little shield thing that goes over the screw. I adjusted it and got him to put it back on...after loosing about 5 nuts (seriously) he got the nut back on and tightened it up. Some time later I left for him and soon discovered that I had no boost what so ever and the car was going no where. Obviously he had managed to adjust the timing screw whilst fitting the nut. Since then I've tampered with it loads of times and it has boost but it comes in at the rev limit lol. I just don't know what to do, please help me! Share this post Link to post Share on other sites
Richie-Van-GTi 71 2 Cars Posted December 28, 2006 the screw on the fuel pump does not effect 'boost'as such, only the amount of fuel on boost, howeverif the car is running very lean the car will struggle regardless of boost pressure. Has he funked about with the screw inside the pump as well, the actual fuel adjustment or just the boost fuel screw? If its just the latter then just wind it right out. Might be worth checking the pipe from the intake to the fuel pump is secure and sealed as with this off or damaged you wont get any extra fuel on boost and you will have a boost leak. Share this post Link to post Share on other sites
Enfield 0 Posted December 28, 2006 I think it's the Lucas pump mate, in fact I'm pretty sure that it is. I only adjusted the timing screw, nothing else. When you say check the pipe from the intake do you mean the intake manifold? Share this post Link to post Share on other sites
Richie-Van-GTi 71 2 Cars Posted December 28, 2006 not overly familiar with the 1.8 layout but somewhere there should be a pipe on the fuel pump that goes to the intake system somewhere so when the turbo spools up and pressurises the intake the pressure is transfered to fuel pump and pushes a diagphram open to allow more fuel to enter the injectors. Share this post Link to post Share on other sites
welshpug 1,657 Posted December 28, 2006 there isnt a "timing" screw on these, to adjust the timing you rotate the pump unit on its mounting. what you're referring to is the max fueling screw I guess (inside the pump under a cap? adjusted by an allen key?) or the max revs screw? (on the top of the pump) does sound like an unrelated problem though, as Richie mentioned check the boost compensator hose, there will be a hose from the pump to the boost side of the intake tract. Share this post Link to post Share on other sites
Richie-Van-GTi 71 2 Cars Posted December 28, 2006 welsh, theres another fuel screw, its to the right of the black cap where the max fuel screw is and it adjusts how much fuel you get under boost. Share this post Link to post Share on other sites
welshpug 1,657 Posted December 28, 2006 the boost compensator screw. I forgot the Lucas pump doesn't have a thingy on the top like the Bosch pump. Share this post Link to post Share on other sites
sutol 0 Posted December 28, 2006 If you do blow it up eventually give us a shout as I'm just taking a 1.8 turbo diesel out of my 205 and putting it in store. It had a recon head etc last year and will keep with a 1.9 GTI from 70 to a ton on the motorway. The wife started screaming at about 105 and we had to give up the chase, not much left though Share this post Link to post Share on other sites
jim21070 2 Posted December 29, 2006 Also, check the boost sensor on the pump itself. Its diaphragm is known to puncture and seriously reduce on-boost fuelling. Trying to adjust the on-boost fuelling may well have sent it over the edge as it were. When you say, Enfield, that your mate "lost" 5 nuts, where did he loose them? Not inside the pump I hope? It could also be that the fuelling adjustments are now so far out that they need setting up from scratch, a specialist job. Or, the fuelling screws have been overadjusted and caused internal pump damage. In any case, tackle it by being logical. Check all the air trunking for leaks and do check the boost sense pipe. All this stuff is so easy to dislodge when working around the engine and so easy to miss. Silly question: Did the engine indicate that it was coming onto boost normally before you started adjusting it? The fault may have already been there I apologise if I'm stating the 'bleedin obvious here. In my experience, these little engines come onto boost quite distinctlyand indeed, Sutol, they do go very well. I'm seriously tempted to do a TD transplant in my Junior! Share this post Link to post Share on other sites
Anthony 1,003 Posted December 29, 2006 If everything else looks OK and it looks to be fuelling related, I'd guess that you're running it far too lean - excessively lean fuelling will give low boost on a diesel, and make it feel really sluggish. Increase the fuelling a little until you get a small amount of smoke off-boost - that'll be about right as a starting point. Share this post Link to post Share on other sites
Enfield 0 Posted December 31, 2006 Cheers fellas. I adjusted "the screw" (Haynes calls it the 'timing screw') anti-clockwise a little and it boosts much better now. Just need to keep adjusting it, but at the moment it's a bit too hot to be doing that as it's right next to the oil filter! Jim, the nuts are underneath the alternator lol. Hopefully they have found their way out by now. Oh yeah, my rear right wheel was trying to wobble it's way off too! I thought something felt very odd at the rear...I put it down to tyre pressures to begin with then I thought no way so drive slowly home and tightened them up! They weren't completly loose just loose enough to make me feel it! So check your nuts ladies and gents. Share this post Link to post Share on other sites
