temp gauge question

40

Asked by Jan 28, 2012 at 07:21 PM about the 1991 Nissan 300ZX

Question type: General

The temp gauge on my 91 keeps jumpimg up & down. When I get on the gas & I'm running at 3000rpms the temp needle goes to cold & stays there. When I let off the gass it goes to the middle showing regular temp.... What do you think causes this? Also when I bought the car they guy that the over flow radiator hose pinched off. I took the clamp off so the radiator overflow could be used again....any reason why the guy would have it pinched off?

2 Answers

1,425

it sounds like your thermostat is stuck wide open or possibly some one took it out -- that is assuming you have plenty of coolant in the car. Sometimes you can gain power by keeping the motor cooler. I see no good reason to pinch off the overflow tank -- buy a new rad cap while you re messing with stuff -- they go bad more than you think!

40

I flushed the system & refilled the coolant with 50/50. I've been keeping my eye on the coolant level & everything seems fine. If there was air is the system would it work itself out?

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