Barry Posted March 30, 2002 Share Posted March 30, 2002 The story goes.... On motorway this evening, put foot down to overtake then all of a sudden I loose all boost, everything.! After a bit of testing I've found the following: Turbo 1 spins up to approx .5 bar (and will hold it), then as soon as the second has started to pre-spool all boost goes completly, even what No.1 turbo was putting out. There are no strange noises and I didn't hear anything odd when it done it first off. I've had a look over the pipes etc round the turbo, checked the IC hosing and cannot see anything loose or blown off. I'll be having another look in the daylight tomorrow but does anyone have any ideas other than loose or split hose? Maybe wastegate control? Link to comment Share on other sites More sharing options...
eyefi Posted March 30, 2002 Share Posted March 30, 2002 loss of boost seems to usually be pipe off or split. bradb had a similar problem:- http://www.rolec.co.uk/cgi-bin/ikonboard/topic.cgi?forum=2&topic=666 http://www.rolec.co.uk/cgi-bin/ikonboard/topic.cgi?forum=2&topic=649 Link to comment Share on other sites More sharing options...
Barry Posted March 30, 2002 Author Share Posted March 30, 2002 Yeah, I was reading through all those posts. I think my symptoms point towards a split hose somewhere, but I've got an HKS front mount and the only standard pipe thats left it the bit that comes off the turbo and dissapears off into the drivers side wing, I've just checked the pipe that you can remove quite easily but can see any splits etc... How do I get to the rest, do I need to take the inner wing off? Turbo #1 does spin up but not as it should, takes almost full throttle to get any boost registering on the guage, then as #2 comes on all boost just dissapears. I would have thought that it would have shown at least some boost when #2 came on and not just loose it all.!?! Link to comment Share on other sites More sharing options...
Branners Posted March 30, 2002 Share Posted March 30, 2002 You havent been fiddling with any of the pipes? Cleaning them or anything? I do hope its just a split pipe somewhere. JB Link to comment Share on other sites More sharing options...
Guest Martin F Posted March 30, 2002 Share Posted March 30, 2002 I hope you got a good warranty with that car ...... :biggrin: Link to comment Share on other sites More sharing options...
Bradb Posted March 30, 2002 Share Posted March 30, 2002 Barry, That sounds very similar to my rectified problem. The best sign is no blue, black smoke. Fingers crossed for you. I know the feeling. Link to comment Share on other sites More sharing options...
Ian C Posted March 30, 2002 Share Posted March 30, 2002 Try the Exhaust Gas Control Valve vacuum pipe (it's smaller than it's name...) It's a bar steward to describe where this is and I haven't got a good picture, so here goes... Bolted on near turbo #1 (the front-most one) is a pair of VSVs. The least accessible one of these is the EGCV VSV. This has a thin pipe going to the EGCV, which is the coke-can sized thing under the turbos. If you look straight down between the bodywork and the turbos, you should see the pipe - it's the only one down there. Mine kept blowing off recently, I had to replace it. The symptom was a loss of all boost once the second turbo started up. You have to check all these little hoses, not just the big mofo going to the intercooler - they can all cause such problems -Ian Link to comment Share on other sites More sharing options...
Nic Posted March 31, 2002 Share Posted March 31, 2002 Barry I had a very similar problem just the other week, I thought it was something serious but it turned out to be one of the 1/4inch pipes that had blown off. The pipe I had the problem with was on top of the engine at the right/rear(standing from the front.) good luck Link to comment Share on other sites More sharing options...
Barry Posted March 31, 2002 Author Share Posted March 31, 2002 Thats everyone for your help and idea's, unfortunatly after over an hour of searching and checking of pipes and hoses I cant find anything loose, split or 'poped' off.! I dont know what else I can do!? Link to comment Share on other sites More sharing options...
Phil Wall Posted March 31, 2002 Share Posted March 31, 2002 Have you tried engine diagnostics. Link to comment Share on other sites More sharing options...
Phil Wall Posted March 31, 2002 Share Posted March 31, 2002 Check out http://mkiv.christurner.net/techarticles/engine_codes/obd1_codes.html for engine diagonsics Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 31, 2002 Share Posted March 31, 2002 Quote: from Barry on 12:30 pm on Mar. 31, 2002[br]Thats everyone for your help and idea's, unfortunatly after over an hour of searching and checking of pipes and hoses I cant find anything loose, split or 'poped' off.! I dont know what else I can do!? Where abouts are you? If you drive over I will have a look at it for you if you want. I am at postcode SY132BT. Get back to me if you want to come across, I'll need to make a proper arrangement, I am out testing a lot at the moment. Link to comment Share on other sites More sharing options...
Barry Posted March 31, 2002 Author Share Posted March 31, 2002 Chris, Many thanks for the offer, I'm just outside north london and I understand that you are up near Chester?! I would have gladly let you loose on my car if it wasn't for the distance. I dont really want to go too far if a hose or something is loose, it will probably throw out the fueling and do more harm! Phil, Good site that, only now I need the little gizmo to read the fault code! Thanks again everyone, keep the idea's coming, I dont give up easily when I have car problems. Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 31, 2002 Share Posted March 31, 2002 Quote: from Barry on 8:38 pm on Mar. 31, 2002[br]Chris, Many thanks for the offer, I'm just outside north london and I understand that you are up near Chester?! I would have gladly let you loose on my car if it wasn't for the distance. I dont really want to go too far if a hose or something is loose, it will probably throw out the fueling and do more harm! Phil, Good site that, only now I need the little gizmo to read the fault code! Thanks again everyone, keep the idea's coming, I dont give up easily when I have car problems. It's VERY unlikely to cause harm, as the map sensor system it uses it VERY tolerant of blown hoses. Have a REALLY REALLY close look at the solenoids on the top drivers side of the engine, above the turbos, make sure one of the very small hoses isn't off. Best done in sunlight or with a GOOD light. Link to comment Share on other sites More sharing options...
Guest Martin F Posted March 31, 2002 Share Posted March 31, 2002 Quote: from Barry on 8:38 pm on Mar. 31, 2002[br] Phil, Good site that, only now I need the little gizmo to read the fault code! Errr it's called your eyes !!!!! All you have to do is short out pins TE1 and E1 of the diagnostic connector together, switch on the ignition and count the number of flashes from the MIL light in the centre of the tacho. Then look up the codes on the chart. Link to comment Share on other sites More sharing options...
Barry Posted April 1, 2002 Author Share Posted April 1, 2002 Martin, Magic, I'll try that. Chris, I've checked these hoses on the solenoids and on the one closest the wing, the two pipes can be pulled off quite easily even with the clips still on them, but are not and were not blown off, could it be possible they are leaking? Even though they do come off with minimal effort I think they still give a good seal.!? Link to comment Share on other sites More sharing options...
Barry Posted April 1, 2002 Author Share Posted April 1, 2002 Well, I tried the diagnostics and the only thing that flashed on the dash was on the small display above the air vent to the right of the dash. It was the engine shaped warning light, it just flashed continuasly! ? Link to comment Share on other sites More sharing options...
Phil Wall Posted April 1, 2002 Share Posted April 1, 2002 That is the one you count. Pulses for the first digit of the code are 0.5 seconds apart, then a 2.5 second gap, then more pulses of 0.5 seconds apart, for the second digit, then 4.5 seconds, that is the end of one sequence. If you have just one code the system will cycle until you stop it, if you have more than one code, it will start with the smallest number code first, then cycle until stopped. An unbroken sequence of 0.5 seconds flashes is good news you have no code. (Edited by Phil Wall at 6:56 pm on April 1, 2002) Link to comment Share on other sites More sharing options...
Barry Posted April 1, 2002 Author Share Posted April 1, 2002 Phil, Ok, I think I got that! I left it flashing for about 2 mins and it just flashed continuasly for that time without slowing up. So thats good then!?! Still, doesn't change the fact that I still have no boost.! Back to square 1 I think.! Link to comment Share on other sites More sharing options...
Barry Posted April 1, 2002 Author Share Posted April 1, 2002 Phil, Ok, I think I got that! I left it flashing for about 2 mins and it just flashed continuasly for that time without slowing up. So thats good then!?! Still, doesn't change the fact that I still have no boost.! Back to square 1 I think.! Link to comment Share on other sites More sharing options...
Guest Martin F Posted April 1, 2002 Share Posted April 1, 2002 Yep if it flashes continuously and regularly (about every 0.5sec i think) then that is the all clear. Link to comment Share on other sites More sharing options...
Lee Burley Posted April 2, 2002 Share Posted April 2, 2002 So, you have no trouble codes stored, and No1 will produce some boost... That means I suspect one of the following... 1) One of the myriad of small pipes has cracked or has come off. I doubt that any of the large intercooler hoses are off or split because it would most likely not build boost at all. Concentrate on the circuits which switch in and out the No2 turbo because it looks like as soon as it comes on line you are venting off all the pressure. If you are in North London, I suggest you have a chat with Leon Green in Watford. When I had a problem with mine I took it over to him and he tested the VSVs, then wired it up as a true twin with an external guage, which allowed him to fault find. Unfortunately, he found out that I had the problem (2) below! 2) You no longer have anything attached to No2 turbo spindle. Where there used to be a turbine blade, there is only fresh air. Prepare to cry like a baby, and get to a cashpoint. Good news is... you can go for hybrids, and if you want to know whether that would be money well spent.... ask BradB Link to comment Share on other sites More sharing options...
Bradb Posted April 2, 2002 Share Posted April 2, 2002 I'd also budget for a race harnesses and an ejector seat if you go the hybrid route. Tidy. Link to comment Share on other sites More sharing options...
Alex Posted April 2, 2002 Share Posted April 2, 2002 So Branners....you sold this car knowing full well you were running it at high boost.... Barry, I'd take it back to the dealer and give him a bollocking!! :biggrin: Link to comment Share on other sites More sharing options...
Graham Rudd Posted April 2, 2002 Share Posted April 2, 2002 Just thought I'd chip in with my experience. Very similar problem and unfortunately, as in Lee's case, no. 2 turbine blade had gone AWOL. Eventually found as lots of tiny pieces bits hiding out inside the first cat. As a frame of reference, mine disintegrated running 1.25bar boost. Graham Link to comment Share on other sites More sharing options...
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