Scooby Pete Posted August 21, 2013 Share Posted August 21, 2013 Hi All, I fitted the boost gauge a while ago and am having some issues :( I 1st connect the boost gauge vacuum hose to the pipe with the red arrow ( comes from the rear top of the manifold) This worked and was giving 1 bar boost. However I noticed that when the car was under boost the needle would read 0 bar and the needle would only indicate a value as you came off boost. So the needle flickered up and down and you go on and off Boost. Hope that makes sense. Wasn't happy with that and it was suggested connecting at the location with the Blue arrow. I fitted it between the manifold and the black plastic thingy and the gauge didn’t give a value at all??? So I moved it to the Yellow arrow and this gave me a negative value and the boost gauge was reading as a minus figure. I have now removed the boost gauge plumbing and am thinking of fitting it at the green arrow Recirc Valve, but don't have enough vacuum hose to do this at the mo. Where should I be fitting it? all 3 points I have used so far have all given me issues :( Quote Link to comment Share on other sites More sharing options...
Jay762 Posted August 21, 2013 Share Posted August 21, 2013 Is it mechanical or an electrical guage with a sensor? Quote Link to comment Share on other sites More sharing options...
Gambit Posted August 21, 2013 Share Posted August 21, 2013 Both boost gauges I've had I had on the blue arrow with no problems. 1st one was mechanical. and now I'm on the electrical evo series. Strange that all 3 have been a problem :( Pete's is electrical too Jay Quote Link to comment Share on other sites More sharing options...
Scooby Pete Posted August 21, 2013 Author Share Posted August 21, 2013 yeah it electrical. another forum are all saying plumb in to the green arrow. Quote Link to comment Share on other sites More sharing options...
Gambit Posted August 21, 2013 Share Posted August 21, 2013 I would give it ago nothing to lose. Have you checked the pipes not squashed flat or kinked anyway as it goes behind the dash only thing I can think of :( Quote Link to comment Share on other sites More sharing options...
Scooby Pete Posted August 21, 2013 Author Share Posted August 21, 2013 Deff not pinched, the Vacuum hose goes to a sender unit in the engine bay and electical wires go through bulk head. Quote Link to comment Share on other sites More sharing options...
Jay762 Posted August 21, 2013 Share Posted August 21, 2013 daft suggestion... have you got the polarity correct on the sender wires as that may send the needle the wrong way? Quote Link to comment Share on other sites More sharing options...
Gambit Posted August 21, 2013 Share Posted August 21, 2013 Oh you did it that way I was lazy and have the sender behind the dash too with the vacuum hose going through ;) mainly because of the old clock. I would maybe check the wiring again just as a last ditched attempt. It's weird that you have had different problems with all 3 pipes you would think it would just be the same problem. And Jay sneaks in there again ;) I will go with Great minds here I think :) Quote Link to comment Share on other sites More sharing options...
Scooby Pete Posted August 21, 2013 Author Share Posted August 21, 2013 Polarity is fine as it did work from the start and seemed fine if I was in i drive, when ever I went to S or S# the needle would stay at zero untill you came off boost then it would flick up to the value. hopefully the green arrow will solve all probs. Quote Link to comment Share on other sites More sharing options...
Gambit Posted August 21, 2013 Share Posted August 21, 2013 I wounder if that's how it is meant to be. Like it's showing the boost available off boost then foot down shows none Quote Link to comment Share on other sites More sharing options...
Scooby Pete Posted August 21, 2013 Author Share Posted August 21, 2013 Seems a bit weird to make a boost gauge different to everyone else's. Quote Link to comment Share on other sites More sharing options...
Gambit Posted August 21, 2013 Share Posted August 21, 2013 Just guessing maybe the company didn't like the look of you ;) But I'm sure one of my old gauges did it like that but was along time ago now I might just be visually think about how it would look :D Quote Link to comment Share on other sites More sharing options...
Jay762 Posted August 21, 2013 Share Posted August 21, 2013 ok so does it work fine in all 3 (green blue etc) positions or just one place when in i mode if so which one? my next question after is going to be where you took the supply from - did you put in a designated feed with its own fuse etc or have you taken a pick up from the loom behind dash? Quote Link to comment Share on other sites More sharing options...
Scooby Pete Posted August 21, 2013 Author Share Posted August 21, 2013 The electrics are wired into the loom at the radio using the ic connector. There's only +,- illumination and ignition. The gauge works ok in i mode connected at the red arrow, however it peaked at 1bar then only registered .5 after that. In s and s# the gauge stayed at 0 under boost then when you came off the gas it flicked up to 1 bar. Blue which has been suggested didn't give any readings at all. Yellow was showing a negative value and the needle moved down under boost. Haven't tried the green yet, not enough hose to hand. I am going to try the blue again as it seems most people say this is the correct place. Quote Link to comment Share on other sites More sharing options...
Scooby Pete Posted August 21, 2013 Author Share Posted August 21, 2013 Sorted :) it have connected it at the blue arrow coming from the manifold into the filter thingy. It's now reads negative pressure and boost. Interestingly the i drive gives .5bar, S is 1bar and S# is 1.4bar. Don't know what I did wrong the 1st time except it was on the right hand connector of the filter before the manifold, and this must have been the problem. Cheers for the advice. Quote Link to comment Share on other sites More sharing options...
Gambit Posted August 21, 2013 Share Posted August 21, 2013 Nice one glad you got it sorted I've nearly scratched down to the skull bone with this one ;) Quote Link to comment Share on other sites More sharing options...
Jay762 Posted August 21, 2013 Share Posted August 21, 2013 thats great to hear - any chance of a final photo showing exactly how you have it plumbed in?? the engineer in me now wants to know why it doesn't work at the other places and why it didn't work the first time it was connected at the blue point - will have a tinker when I get my own B) Quote Link to comment Share on other sites More sharing options...
Scooby Pete Posted August 21, 2013 Author Share Posted August 21, 2013 I'm guessing that the black filter thingy is actually a directional valve or something and I must have plumed in to the input side or something. Quote Link to comment Share on other sites More sharing options...
Gambit Posted August 21, 2013 Share Posted August 21, 2013 I must have had lucky guess. I thought it was just a filter of some sort. I will now have to check wht side mine is but it's working fine. Quote Link to comment Share on other sites More sharing options...
Scooby Pete Posted August 22, 2013 Author Share Posted August 22, 2013 Here is a pic of the instal. I turned the black thingy 90 deg as it wouldn't fit with it straight on. 1 Quote Link to comment Share on other sites More sharing options...
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