Dancing Temp Gauge - Alfa Romeo Bulletin Board & Forums

 
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post #1 of 8 (permalink) Old 02-14-2017, 11:27 PM Thread Starter
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Dancing Temp Gauge

My temp gauge in my Milano has started dancing and getting progressively worse over the past month. See the quick video below.

Would this be sending unit, gauge itself, or something else? The problem is intermittent. Sometimes it reads just fine and steady. Other times it does this dance.

Thoughts?


--Scott
Current: 85 GTV6, 69 Duetto, 87 Milano Gold. Past: 65 Giulia Sprint GT, 77 Alfetta, 79 Alfetta.
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post #2 of 8 (permalink) Old 02-15-2017, 07:43 AM
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Could be a "dead spot" on the sender, but more likely just a loose connection. Try having someone wiggle the wire to the sender while you watch the gauge. Of course it could also be a loose connection in the dash as well.

Sent from my TM800A612R using Tapatalk
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post #3 of 8 (permalink) Old 02-15-2017, 09:29 AM Thread Starter
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Sorry -I should have mentioned...I have checked and cleaned connections at both ends. They appear fine.

--Scott
Current: 85 GTV6, 69 Duetto, 87 Milano Gold. Past: 65 Giulia Sprint GT, 77 Alfetta, 79 Alfetta.
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post #4 of 8 (permalink) Old 02-15-2017, 10:10 AM
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Garage
Mine did that too when I first got the car. I checked and cleaned the connections (including the small nuts that hold the ribbon to the back of the gage) with no improvement. I replaced the gage mechanism and it was sorted out.

I have found that cleaning the grounds at the front of the engine compartment helps with gage stability. My tachometer would read inconsistently. I cleaned all grounds and the power distribution blocks in the engine compartment and now it is rock steady.

Good luck
Mark

84 Spider - Long gone, but started the addiction; 85 GTV6 - Current project, Supercharged, Mega Squirt; 88 Verde - "Milo" It has a name, must be a keeper
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post #5 of 8 (permalink) Old 02-15-2017, 05:09 PM Thread Starter
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That's a good point. I did that with my gtv6 and it helped a number of things.

--Scott
Current: 85 GTV6, 69 Duetto, 87 Milano Gold. Past: 65 Giulia Sprint GT, 77 Alfetta, 79 Alfetta.
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post #6 of 8 (permalink) Old 03-01-2017, 02:13 AM
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Hi There,

Had quite the same symptoms after an engine rebuilt on my 3.0 QV

Temp was dropping slowly when driving and suddenly going up back to 90°C

Cleaned the connexions, grounds etc....

No effect .

Finally I changed the sender with the right ref 60605959 for a QV ( quite difficult to source )

Problem sorted . I don't know really if it was a bad sender or the wrong type

If it can help

Bruno

1971 spider 1300 junior - 1982 GTV6 3.2 24V racer - 1990 75 V6 QV
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post #7 of 8 (permalink) Old 03-01-2017, 09:34 AM Thread Starter
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Thanks for that. I just got some stuff sorted on my GTV6, so working on this on the Milano is next.

--S

--Scott
Current: 85 GTV6, 69 Duetto, 87 Milano Gold. Past: 65 Giulia Sprint GT, 77 Alfetta, 79 Alfetta.
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post #8 of 8 (permalink) Old 04-08-2017, 05:59 PM Thread Starter
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Just closing out thread. A simple cleaning and tightening of electrical connections at the sending unit remedied this. Should've just tried that first.

--Scott
Current: 85 GTV6, 69 Duetto, 87 Milano Gold. Past: 65 Giulia Sprint GT, 77 Alfetta, 79 Alfetta.
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