Question about 1998 Saturn SL

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Tempature gauge drops rapidly then pops back up real fast.wht could cause that??

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Bad ground on the sensor or gauge.

Posted on Dec 05, 2011

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Apr 04, 2014 | 1996 Jeep Grand Cherokee

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Mechanic book


which engine? size?
the ECU nor any lamp can save the engine with no oil or too low
or never changed out.
you missed, week level checks.
and if levels drop fast (as it will driving real fast)
you check more often, in fact you learn what your engine needs.
my guess is loss of oil pressure,
the idiot lamp( just name) comes on with its TOO LATE..
on most cars made.
get a real gauge called oil pressure.
or the engine overheated
or just bad luck.
what seized, cam , crank or rod bearings.
the machinist will tell you for sure what failed.
the pump or low levels.
push rod engines. the rear rod bearings like to fail first (low oil)
then on overhead cams, they bite dust first. (top end oiling can fail easy)
also, on the last rebuild did (no 2 before) the PO, ran water for antifreeze this cause the internal freeze plugs to pop and
water in oil and rear rod spun(seized)
water makes really poor oil substitute.
when you take it down there are tons of clues.
blue metal.
oil looks like chocolate milk shack
bearings spun ,cam bearings gone.
cracks in block and head.
ever inch checked then pressure tested before rebuild.

Aug 08, 2013 | Jeep Grand Cherokee Cars & Trucks

1 Answer

My tempature gauge will register normal tempature after engine runs and heats up but will drop back to no tempature.


ZI suggest you have the engine thermostat replaced, it is likely sticking open and allowing the engine to cool down. The thermostat is under the cover that the upper radiator hose connects to on most GM engines.

Jul 24, 2012 | 2005 Chevrolet Silverado

1 Answer

I have a 1991 honda accord lx and one day while driving my RPM gauge started to move back and forth rapidly, it dropped down to zero and my car shut off. i changed the fuel filter and my car was driving...


a dirty or faulty MAF sensor can cause proplems like this. try cleaning it with CRC MAF cleaner you can get it at just about any autoparts store. the MAF is located on the air intake disconnect the electrical connection and remove the sensor be careful not to damage the fragile filaments inside. there is no need to wipe it just spray it clean and let air dry be sure to spray all parts plug, filaments everything

Apr 16, 2011 | 1991 Honda Accord

1 Answer

My 1998 ford expidition temp rises suddenly then drops back to normal after a few seconds. what causes this?


Could be a few things, - low coolant - bad thermostat- thermostat installed wrong - bad tempature sensor - loose connection to sensor. wiring to gauge. look for the easyest things first.

Jan 13, 2011 | 1998 Ford Expedition

1 Answer

My left & right indicator does not work & does not blink when it's on.. how do i fix it?


There could be several things that will cause your blinkers to stop working. Most will have to be diagnosed by a QUALIFIED automotive electrical shop but there is one thing you can try first. Step one is to turn your blinker stalk rapidly between right and left turn. Don't damage anything, just go back and forth several times real fast. Next, turn your emergency flashers on and off. Rapidly, like you did with the turn signal stalk. Again, don't damage anything, just do it as rapidly as you can, several times. What you are trying to do is clean the contacts inside the switches. Those two circuits work together to operate the turn signal lights and the emergency flashers are rarely, if ever, used and the contacts get a little corroded.

Nov 22, 2010 | 1991 Daihatsu Charade

4 Answers

Oil pressure drops to 0 if i turn off truck and restart it goes back up to 40


Do you have enough oil in it? If it's real low on oil the oil can't flow back into pan fast enough to keep the pump from cavitating. It might be the gauge try puting a mechanical gauge on it for test purposes. When the gauge drops to zero does the engine get louder, like it's not getting oil? Do you hear the lifters start to clatter, or rods starting to knock? If the engine sounds normal there's a good chance it's just the gauge. If it's making noise shut it off right away!!!

Dec 12, 2009 | 2005 Chevrolet Silverado

2 Answers

Tempature gauge goes to high with full coolant.


if no codes a few choices to problem could be fan not working properly/thermostat stuck closed or broke/water pump failure/radiator clogged-outside blocked/bad sensor(usually pops a code)these are the most common good luck

Oct 23, 2009 | 1999 Dodge Caravan

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Oil tempature gauge fluctuates sporadically


NO.... BUT THEY COULD HAVE COMPROMISED THE WIRING OR SWITCH AT OIL FILTER AREA

Jan 13, 2009 | 1999 Nissan Maxima

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Car stalled


these vehicles overheat real fast when u noticed the water pump leak yu should have replaced it now i think that you have over heated the head and the heads have to be removed , check for cracks and most probably you will end up doing a valve job and replacement of the head gasket, water pump and the timing belt. sorry not very cheap at all

Nov 11, 2008 | 1994 Acura Vigor

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