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Old 07-27-2006, 11:43 PM   #1
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I have notice a wierd thing with my boost gage lately. I have only noticed it at night when the dash lights are on. It will just all of a sudden get stuck on the middle of the gage at 0psi. Then if i give it slight throttle it pegs the needle to 10 psi. then after that it wiggles back an forth and iether gets stuck at the bottom -10psi or back at zero. After acouple cycles and couple minutes all is normal and the gage moves as it should with throttle. I checked all of the vaccum fittings, even removed them and checked them very closely and found no problems. just wondering if anyone has seen this before?
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Old 07-29-2006, 11:18 AM   #2
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That it strange. Sounds like either your MAP sensor or the gauge itself it going. Just curious as to whether you checked the condition of the "T" under the */C snout? That one can be a bit hard to see, and the hose that leads to the back I believe goes to the MAP sensor.
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Old 07-29-2006, 02:30 PM   #3
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Quote:
Originally Posted by Archon
Just curious as to whether you checked the condition of the "T" under the */C snout? the hose that leads to the back I believe goes to the MAP sensor.
Dick, that is correct, the vacum line leaves the "T" and terminates at the MAP sensor. Those particular vacum lines & the MAP are very obscure and diffucult to inspect closely.
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Old 08-05-2006, 03:25 PM   #4
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Sorry I haven't responded sooner. I went out of town the day after I posted this. yup I checked all of the fittings pysically and with starting fluid. I replaced the entire vacum harness a few month ago so I am pretty sure that it is all good. The map sensor was my first thought as well. If it is the gage that requires a whole new cluster right? if so I'd just hook up an after market gage to monitor boost.
thanks
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Old 08-05-2006, 03:33 PM   #5
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You may have other leaks..but try swapping the map sensors.. there should be two.. swapping the wiring and getting good readings would pinpoint if the sensor is bad.
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Old 08-05-2006, 03:45 PM   #6
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Hey that'* a good idea! next chance I get thanks again.
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Old 08-05-2006, 07:00 PM   #7
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Mine does this every once in a while. I think it is just a brain fart. It always clears up after a couple of starts.
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Old 08-05-2006, 09:35 PM   #8
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Quote:
Originally Posted by BillBoost37
try swapping the map sensors.. there should be two.
I'm not following you on this one, Bill. There is only one MAP sensor. Or did I misunderstand what you posted. I agree though, he could swap the MAP out with another MAP as a troubleshooting measure.
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Old 08-05-2006, 10:09 PM   #9
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according to my manual there is indeed two sensors but the hose only goes into one of them. from the picture i think they may both be contained in one unit. I'm gona go look now to see if I can tell.

EDIT: after looking it may say two sensors but there is only one box so either way I guess there is just one part to be replaced.
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