Well over the last week or so I have caught the neddle in my boost gauge moving a bit quicker + bouncing a bit different than usual. Well today when I was going up a hill I noticed that the gauge would go up as per usual BUT when it got about half way 0.5 kg/cm it would stop and shoot back into vacum! I went down and up again and it did the same thing! THEN when I pulled up and stopped I noticed that the vacum would sit a just under 500 and then every 5 secs it would drop to 760 for a couple of secs then go up to just under 500. It just sits there doing that. I haven't noticed the car underboosting it just seems to be the gauge!

What could be causing this? I think it may be respondind a bit slower than it should now as well, i.e Im boosting and it will jump up to 0.9 well after I have started to boost.

Any ideas?

Cheers
KiwiMR2

 

What brand gauge is it? I had a greedy gauge that did a similar thing to yours it never held at any specific boost level. All of my connections were tight and I didn't have any leaks either. But, it was an electronic kind and maybe it was on it's dying legs. I would check for any boost leaks then, make sure all of your gauge connections are still good.

Good luck,
Mike L.

 

It's a Greddy boost gauge with peak hold and warning, It's never been a problem since I got it, always been consistent and very accurate. Mabey I have a leak somewhere?

http://board.mr2faq.com/attachment.php?postid=335237

Cheers
KiwiMR2

 

The one that I had was a peak warning hold as well. It's been dead for awhile now until I get an replacement. Mine would just go up then, drop to vacuum everytime. They're suppose to hold at whatever the boost level is. I have a feeling that the electronics were going bad. Is yours new or old? Have you tried to get a hold of the place you got it from and can they give you some tech advice. The greedy guys here in the US aren't known for their customer service skills.

Mike L.