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Old 06-09-2002, 09:32 PM   #1
adamsrs
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Exclamation Defi Gauge Question..Important! Thanks!

I have just recently installed a set of Defi Link EGT gauges. THey are 52mm and have a black face....well my Boost gauge is GREAT, but the EGT and the Fuel Pressure one are not perfect..they needles wiggle...im confused as to why though. THe ONLY thing that i did was cut the daisy chain and extend it becuase i have the Boost gauge in the a pillar and the fule pressure adn EGT in the center console...any ideas as to why the needles wiggle? Thanks a LOT!
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Old 06-09-2002, 09:44 PM   #2
JenisonWRX
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wiggle? like how much?
cause I don't see it..
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Old 06-09-2002, 10:00 PM   #3
adamsrs
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The EGT wiggles quite a bit! Like 1/8-1/4 of an inch....and the Fuel pressure about 1/16" could the Daisy chain extensions be causing this? The lack of insulation, the lack of conduit...doesnt make sense.....PLEASE HELP! I cant tell if my EGTs are 1500 or 1700 some times it moves so much!
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Old 06-09-2002, 10:30 PM   #4
silvercharged
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Defi gauges need a GOOD ground, in my experience, to work real well. Try running the black ground wire from the power harness directly to the negative terminal on the battery. This may help.....
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Old 06-09-2002, 10:40 PM   #5
adamsrs
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Ok, thanks.......but this still makes no sense because the boost gauge reads perfectly! Im pretty confused...
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Old 06-09-2002, 11:35 PM   #6
Kcz
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I had the same problem. Make sure the egt cable is secure and not bouncing around in the engine bay. I zip-tied mine in about three places and the needle isn't jumping all over the place now.
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Old 06-09-2002, 11:44 PM   #7
adamsrs
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So i need to tie down the actual EGT cable....?not the wiring harness? That sounds too easy! How would that make sense though.....please explain
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Old 06-10-2002, 06:40 PM   #8
Kcz
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It doesn't make sense, just try it, mine works perfect now. Just secure the steel braided line that goes to the probe. I just moved the cable around and it would work for a little while and start bouncing around again. Then I just zip tied it down real good.
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Old 06-10-2002, 07:05 PM   #9
adamsrs
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And you did this on a DEFI gauge? Ok, i will try it...but what about where the wire is too long...i had to loop it up....have any pics?
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Old 06-11-2002, 12:08 AM   #10
Kcz
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Yeah I have the DEFI boost and egt guages. I'll try to get some pics.
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Old 06-11-2002, 12:20 AM   #11
Kcz
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I think what is causing it is the small harness that is about 2ft. from the probe. I don't think they chose a very good connector. Make sure that harness isn't moving around too much.
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Old 06-11-2002, 05:06 PM   #12
wcbjr
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The boost gauge is mechanical, isn't it? I am assuming the EGT and fuel pressure gauges have senders. I bet it is a bad connection on one of the wires, power, ground, or signal.
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Old 06-29-2002, 12:00 AM   #13
foofoo
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Hey guys,
I know this thread is getting pretty long but I too have the same problem with my Defi gauges. I also have an important question for all of you. I also have a 60mm tach gauge that would only go up to 5k. This is what would happen. I would start the car and the tach gauge would read the rpm's exact. Then when I gave it some gas the needle would start to bounce like crazy ( when I started to go over 3k ). I would take my car to a track and rev it up over 6k but my Defi tach would only go up to 5K. Finally after I did a run I would hit the peak button and the tach would show 11k. YEAH WHATEVER!!! The highest I would take it is like 72k. Has anybody else had this problem with any of there gauges??? Also, the dealer I bought this from doesn't know exactly what to do. Should he call Defi directly and ask for a version II as a replacement. Hope you guys respond to this question.
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Old 07-01-2005, 02:19 PM   #14
Big-Sexy907
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Sorry to bring up a old post. My EGT is having the same bouncing problem... Anyone found a remedy?
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Old 08-12-2005, 11:52 AM   #15
Seranin
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Ditto with my Boost gauge... seems either grounding or securing cabling?
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