I posted this on the electronics board but didn't get a response.

Has anyone had this prob? My oil gage doesn't move smoothly over the number anymore. It kinda moves in steps, but still is accurate. I replaces the sending unit, but that didn't help. Any suggestions?

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1988 L98
Vette Heads/no EGR
SLP Headers/Y-Pipe
ARAP bin

 

Dan,

It's probably mechanical binding in the instrument movement itself. How old is the car, and was it ever in a collision?

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Later,
Vader
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"Get UP - Drop the bombshell!"
Adobe Acrobat Reader

 

Pieces of dirt within the movement will do that. Little metal shavings are the worst, being magnetic. Those are a real chore to work on because the scale is riveted to the movement, so it's tough to see into it or get a needle in to clean it out.

You might be better off to get another one at the junkyard.

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"So many Mustangs, so little time..."
ICON Motorsports

 

It's the orignal 1988 gage, it's an 88 IROC. Two things may have caused it. 1 I had to take the cluster out to replace the speedo cable. 2 I got hit in the right front fender a couple of years ago, not to hard but enough for a new fender. I don't remember when the gage started acting funny, I always thought it was casued by a wrong sending unit. Do you know if the gage is easy to access when the cluster out? Is it worth taking apart? It does work, it's just annoying. Thanks!

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1988 L98
Vette Heads/no EGR
SLP Headers/Y-Pipe
ARAP bin

 

Part 2 to my story. Last night I took out the gage cluster and tried to clean the oil gage movement, not easy! I got it back together, still the same problem. I did notice that when I start the car the oil gage jumps to 60 psi, then I turn the car off and the gage returns to the mid-point, then I turned the head lights on and the gage dropped to 0 psi. So I have a gounding prob to track down, I was going to find a cluster gage out of a junk camaro but this grounding problem changes everything. I also was thinking of spraying WD-40 in the oil gage, will this hurt it?

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1988 L98
Vette Heads/no EGR
SLP Headers/Y-Pipe
ARAP bin