When i turn the ignition on, the gauge jumps around. It normal when the engine is on though. What is going on?

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• 89 Formula 305 WS6
  SFC's
  LCA's
  Spohn Panhard Bar
  Air Foil
  Flowmaster Cat Back
  Tranny Cooler
  A/F Ratio Meter (not a mod but it sure spurs interest)
  Trans Temp Gauge
  Most "Free" Mods
  3:73, Zexel Torsion Posi
• 90 Eagle Talon 2.0
  (Winter Beater)
  Mods? HA! Its A Rice Burner!

 

usually oil preasure is related to engine speed, more rpm = more oil preasure. if you're unsure about it first thing i'd do is put a mechanical gauge on the engine and see what you have.

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ICON Motorsports

1st & 3rd
MM Black Diamond Lodge 538 F&AM

 

The easiest thing to do is just swap the sending unit... that sounds like what's wrong. It's about $15 and takes about 3 minutes to change.

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

 

Cool, thanks. I have never seen it fluctuate before. I will end up changing the sending unit, i just was wondering if it was a normal occurance when the engine is off

 

Mine did this for a couple of months and then just stopped out of the blue. It's been fine now for a year....weird