Matthew Posted February 10, 2009 Share Posted February 10, 2009 Hi All.. Long story short; was out playing on salisbury plain a few months ago, when I got back on the tarmac it was very clear I had no where near full power. Infact at anything more than 1/4 throttle opening the engine seemed to be starved of fuel. Got it back, drained the tiny amount of fuel left in the tank, changed the filter and lift pump (because I had them on the shelf anyway). Didn't make any difference at all. Then I looked into this and the fuel filter was not getting filled properley so we knew there was a problem getting fuel from the tank to the filter. I used an air line to blow the fuel lines through and found the main pick up pipe from the tank had a blockage in it. Cleared by the airline pressure. Connected it all up and it ran really well...for a short time anyway! Over the weekend the problem seems to have re-appeared! When using any more than 1/4 throttle opening the vehicle becomes incredibly sluggish and chucks out clouds of firstly grey then white smoke. I left the vehicle overnight and restarted this morning and got clouds of smoke when accelerating. When you first start the vehicle and use only low revs, the engine runs well and sounds 100% normal. Obviously I'll check the fuel lines again first, but has anyone had a similar problem? Anyone got any suggestions where/what to check? Its a retro fitted 200TDi, vehicle used to be a 2.1/4 petrol. Thanks for your help! matt Quote Link to comment Share on other sites More sharing options...
T1G UP Posted February 10, 2009 Share Posted February 10, 2009 Hi All..Long story short; was out playing on salisbury plain a few months ago, when I got back on the tarmac it was very clear I had no where near full power. Infact at anything more than 1/4 throttle opening the engine seemed to be starved of fuel. Got it back, drained the tiny amount of fuel left in the tank, changed the filter and lift pump (because I had them on the shelf anyway). Didn't make any difference at all. Then I looked into this and the fuel filter was not getting filled properley so we knew there was a problem getting fuel from the tank to the filter. I used an air line to blow the fuel lines through and found the main pick up pipe from the tank had a blockage in it. Cleared by the airline pressure. Connected it all up and it ran really well...for a short time anyway! Over the weekend the problem seems to have re-appeared! When using any more than 1/4 throttle opening the vehicle becomes incredibly sluggish and chucks out clouds of firstly grey then white smoke. I left the vehicle overnight and restarted this morning and got clouds of smoke when accelerating. When you first start the vehicle and use only low revs, the engine runs well and sounds 100% normal. Obviously I'll check the fuel lines again first, but has anyone had a similar problem? Anyone got any suggestions where/what to check? Its a retro fitted 200TDi, vehicle used to be a 2.1/4 petrol. Thanks for your help! matt I'd replace the fuel line front to back. Quote Link to comment Share on other sites More sharing options...
Matthew Posted February 10, 2009 Author Share Posted February 10, 2009 I'd replace the fuel line front to back. Thanks for the input marcus, I've just replaced the rubber sections of the fuel line because I had some kicking around. I did find a small break in one part of it so must have been pulling air in. Took it round the block quickly and still no different, going to take it for a longer drive in a minute. If still no better I'll replace the metal part of the fuel line as well. Then it'll have had the following: New fuel pick up sender (about 12months ago) New rubber sections of fuel line (today) New lift pump (about 2-3months ago) New filter (about 2-3months ago) Complete tank drain and flush (about 2-3months ago) Anyone got any other ideas? Thanks again! matt. Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted February 10, 2009 Share Posted February 10, 2009 To test, run the engine off a can of fuel on the bonnet (safely, obviously), this will negate the need for a lift pump and allow you to test the filter and injection pump. Then put the can on the floor and use the lift pump, this will allow you to test that the lift pump is working. My bet's on there still being a blockage in the fuel line running from the tank, or at the pickup. Someone i knew had loads of trouble with fuel starvation. turned out he'd used ex-army jerry cans at one point which had emptied all of their internal paint into the fuel tank. he suffered from blocked pipes for months, despite cleaning the lines etc, there was just too much rubbish in the tank. Quote Link to comment Share on other sites More sharing options...
Simon Smith Posted February 10, 2009 Share Posted February 10, 2009 Is the breather clear? Mine gummed up with veg oil once and caused the same symptoms. Quote Link to comment Share on other sites More sharing options...
Matthew Posted February 10, 2009 Author Share Posted February 10, 2009 Thanks for the suggestions, fingers crossed its all sorted now! (runs off to find some wood to touch!?) Just been out in it after changing the rubber sections and it seems to be running correctly again. I'll inspect all the other fuel lines in the morning and may replace anyway if the costs not going to be much. Only problem is it would appear my oil pressure sensor has given up, no light with ignition turned on and engine off. Changed the bulb for a known good one, no different. Anyone know what signal/voltage you should get from the oil pressure sensor when there is no oil pressure? Thanks, matt. Quote Link to comment Share on other sites More sharing options...
markyboy Posted February 10, 2009 Share Posted February 10, 2009 Thanks for the suggestions, fingers crossed its all sorted now! (runs off to find some wood to touch!?)Just been out in it after changing the rubber sections and it seems to be running correctly again. I'll inspect all the other fuel lines in the morning and may replace anyway if the costs not going to be much. Only problem is it would appear my oil pressure sensor has given up, no light with ignition turned on and engine off. Changed the bulb for a known good one, no different. Anyone know what signal/voltage you should get from the oil pressure sensor when there is no oil pressure? Thanks, matt. You should have 12v to the bulb and hence to the oil pressure sender unit. The sender unit effectively grounds out the 12v when no oil pressure is present ie. with the engine off. Then, when oil pressure is present, engine running, it isolates the ground, therefore, the light goes out. If you have a voltmeter/test lamp, check to see if you have supply between the oil pressure switch wire and earth. If you do the likelihood is that the switch is faulty. If not then the fault is upstream somewhere. If you have a multimeter you can check for continuity between the the oil pressure switch and earth with the engine off, you should have continuity, and with the engine running, there should not be continuity. Hope this helps, Mark. Quote Link to comment Share on other sites More sharing options...
western Posted February 10, 2009 Share Posted February 10, 2009 stick a new sender unit on, they aren't repairable. Quote Link to comment Share on other sites More sharing options...
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