boost gauge problem!

[whiskeyjack88]

i just fitted my very first boost gauge today, went very well if i do say so myself she's all wired up now and looking sweet.

only problem is that when i start up the car is that it doesn't work till you put on the headlights, any ideas as to what i'v done wrong?

also, the reading on the gauge doesn't match what the boost controller is telling me. idles at -0.45 roughly on the boost controller and on the boost gauge its at about -0.02 bar, any ideas on what thats about?

[Alan B.]

when you say it doesnt work, do you mean it doesnt light up?

is your power wire connected to your lights/cig lighter?
could be better off connected to your head unit trigger wire instead.

[slithertooth]

i just fitted my very first boost gauge today, went very well if i do say so myself she's all wired up now and looking sweet.

only problem is that when i start up the car is that it doesn't work till you put on the headlights, any ideas as to what i'v done wrong?

also, the reading on the gauge doesn't match what the boost controller is telling me. idles at -0.45 roughly on the boost controller and on the boost gauge its at about -0.02 bar, any ideas on what thats about?

When do you want it to light up??
Where did you take the feed for it, is it on vacuum or boost side

[whiskeyjack88]

when you say it doesnt work, do you mean it doesnt light up?

is your power wire connected to your lights/cig lighter?
could be better off connected to your head unit trigger wire instead.

doesn't work what so ever, only when the headlights are on that it works.
ya, couldn't figure out which one wire was the power for the head unit so i just used the cig lighter.

how would that make a difference though?

[whiskeyjack88]

When do you want it to light up??
Where did you take the feed for it, is it on vacuum or boost side

i mean im not getting any power what so ever to it when the car is turned on till the light are switched on.
feed is coming from were the standard boost hose used to be,

[slithertooth]

i mean im not getting any power what so ever to it when the car is turned on till the light are switched on.
feed is coming from were the standard boost hose used to be,

Try give it an ignition live , it will light up then once you have ign on, your better off with some manner of a poer probe/ circuit tester so you know you have a good power supply,
have you tried driving it , does it come on boost and read, reading approx 0 bar sounds like it's plumbed onto the boost side, pic's of how the pipe is routed would help

[Cooldrft]

Sounds like you took the power feed from the wrong wire "possibly a light for cig lighter".
Does the gauge read a + value when you're driving ?

[hoopsbhoy]

Sounds like you took the power feed from the wrong wire "possibly a light for cig lighter".
Does the gauge read a + value when you're driving ?

Get a little 12v wire tester in the motor factors, will save you alot of hassle. You have put your positive battery wire into a "lights" wire.

So it didnt go that smoothly at all ha ha.

As for your readings, i'd say you have it plumbed on the boost side instead of intake side. What line did you tee into?

[whiskeyjack88]

took her for a drive to the offie just now i also took pics of the readings and were there plumed into. uploading to photobucket at the moment, so they'll be up in awhile.

will have to go and get a 12volt wire tester 2morrow i say, strip down the dash again and find a better spot for the power.

@hoopsbhoy-it went smoothly enough for a first timer i thinks

the readings act seemed fine wen on full boost, both read the same at +0.5 bar (thats when i get my missfire). only the fact that i went and played around with the boost controller did i realizer that the readings it gives on idle isn't in bar but mmHg.

[Alan B.]

as cooldrft said, it sounds like you've the wire for the light ring around the cig lighter as your power feed and not the wire that powers the cig lighter itself.

that makes a diff because that light ring is only powered when you turn on your lights.
the trigger wire on the stereo is a blue wire usually.