Showing it's getting hot?

COLONAMAXWELL

MEMBER
2005 BUICK RENDEZVOUS
122,500 MILES

I have a 05 Buick Rendezvous , when the fans kick on the temperature gauge goes up to about 3/4 then when the fans kick off temperature gauge goes back down to about 1/4? Not sure what the problem is? Took it to have a diagnostic test done on it and it’s showing that the motor is not getting hot at all , it’s at 216, what it calls for, only other problem that showed up on the diagnostic test was the oil sensor,
also having problems getting the vehicle to start, doesn't want to start without giving it a little bit of fuel? Then it starts up? Parts replaced so far, A new Thermostat, A new temperature sensor, Fuel Injector, Idle Control Valve, Throttle Position Sensor. Please help !

6 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Did you have the radiator flow tested? It may be clogged.

Get the fuel pressure checked on start up.

Roy

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Friday, September 14th, 2012 AT 1:15 PM

KHLOW2008

MECHANIC
41,815 POSTS

Symptoms indicates the gauge is giving a false reading and the most likely cause is a poor ground circuit connection.

The other possibility is a bad ECT causing the wrong reading and difficult starting.

A bad oil sensor can cause difficult or non starting as the PCM is programmed to cut off engine when oil pressure drops.

Which engine do you have?