1999 Saturn SL - Page 4 - Answered Questions & Fixed issues

well there are 2 coolant sensors,,,one is the coolant level sensor which is internal to the coolant resivor,,but i think you are talking about the infamous engine coolant temp sensor,,,,ok pop your hood you will see the cam cover that says saturn on it,,,,thats the top of the engine,,,ok,,,then on the lower right side of that you will see the upper radiator hose,,,and the EGR valve,,,,now inbetween the egr valve and upper rad hose is where the coolant temp sensor is,, its just below them,,there is a little wiring harness with a yellow and a black wire going to it,,,,it actually screws into the lower side of the cylinder head,,,,just squeze the wiring connector at the 2 thicker spots and pull it straight off then take the coolant cap off the resivor,,to relases pressure and put it back on,providing the car is not hot,,,,the sensor is actually a 13mm or 14mm socket that removes the sensor,,,,,they usually crack and leak into the harness so check the harness for corrosion,,,,be like green/blue on terminals,,if so youre gonna have to wire in a new connector,,,,no big deal ,, normal s-series issue,,,do not use aftermarket junk like autozone as these do not read correctly from the start youre gonna have to shell out the money at the saturn dealer for the good stuff ,,like $18 for the sensoe and $37 for the connector but it comes with the 2 **** connectors you need to wire it in,,,so if you remove the sensor just put the new one in snug but dont break it off,,,,top off coolant,,,,cut the 2 wires off the old connector as close to the end as possilbe. so you retain as much wire as you can,,,,,it doesnt matter which wire goes on what side but i lke to keep it the way it was the black wire on the right and the yellow on the left,,use the **** connectors,then heat shrink them and wrap them with electrical tape and youre done

1999 Saturn SL | Answered on Aug 19, 2014 | 2,727 views

Start by replacing the ignition coil. (Don't remember if that year has a coil pack or a distributor with an HEI coil... either way, replace the coil).

1999 Saturn SL | Answered on Jul 20, 2014 | 67 views

post symptoms like this.
i check head lights, they work key out , so do they?
i turn the key to Ignition on.
the dash self test lamps all glow, do they,?
look at that CEL lamp, (aka SES) lamp, check engine lamp
it it dont glow the engine brain, lost power, fuse, (head lamps work)
if the CEL glows. then now crank the engine, (start pos.)
does it crank robustly? yes /no?
yes, do you have spark>
no, does car crank over fast with jumper cables to running donor car?

that is start, no pun.

1999 Saturn SL | Answered on Jul 18, 2014 | 215 views

Rack or power steering pump or belt

1999 Saturn SL | Answered on Jul 16, 2014 | 31 views

There are two sensors, one on the exhaust manifold the other on the catalytic converter. The exhaust manifold is the easy one to replace, the other the car needs to be on a lift.

Changing the O2 sensor will improve you gas mileage,

1999 Saturn SL | Answered on Jul 03, 2014 | 106 views

It sound like map sensor when it under load it bring the revs up

1999 Saturn SL | Answered on Jul 01, 2014 | 71 views

is the odometer dead too?
key fact, save tons if work.
both use the SAME signal. so............

first what is bad, then how, follows.

1999 Saturn SL | Answered on Jun 23, 2014 | 43 views

We have 96 toyoto camery. It will start then it will die for no reason. Take the map senser out it will run. Just uses a lot of gas. Is it the senser or something else.

1999 Saturn SL | Answered on Jun 19, 2014 | 319 views

Make sure the fan temp sensor is working, that is does the coolant fan come on when it gets hot.

1999 Saturn SL | Answered on Jun 09, 2014 | 105 views

u will not fix it. it sounds like the track motor has slipped. so; take it to a mechanic, that u trust and let them fix it. lol. there hav been a few other questions about this issue on this site in the past. lol.

1999 Saturn SL | Answered on Jun 04, 2014 | 50 views

Brake booster is possibly leaking

1999 Saturn SL | Answered on May 09, 2014 | 20 views

There are several things that could be wrong. The problem with an Auto Zone scanner is that it's just a code reader. You'll need to troubleshoot the engine. Start by looking for a vacuum leak. Are the fuel and air filters clean? How about plugs and wires?

1999 Saturn SL | Answered on May 09, 2014 | 236 views

Look at the engine mount on top and make sure it isn't broken. If the engine is twisting due to torque load it may be pulling on the throttle cable assuming the year you have has one. Just a thought.

1999 Saturn SL | Answered on Apr 28, 2014 | 77 views

It could just be that your horns are bad and need replacing. You got to the horn relay and have somebody push the horn buttons while you hold your fingers on the relay, if you feel it click the your buttons are good and you have bad horns.

If you need further help, reach me via phone at https://www.6ya.com/expert/steven_a67ead41eb5fc62a

1999 Saturn SL | Answered on Apr 26, 2014 | 50 views

Check or replace the MAP sensor also if the sparkplugs, wires or coils have been change make sure the firing order is correct, at the plugs and the 2 coils.

1999 Saturn SL | Answered on Apr 22, 2014 | 118 views

this may be detonation from incorrect air/fuel /timing combination. IT is generally lean mixture and mostly can be heard on acceleration. Run fault codes to find faulty sensor that is affecting the correct air fuel mixture.

1999 Saturn SL | Answered on Apr 11, 2014 | 76 views

hi if you look on the lid of fuse box it shoud be on there or in the hand book

1999 Saturn SL | Answered on Apr 10, 2014 | 25 views

well 99 was a loose year aye

1999 Saturn SL | Answered on Apr 03, 2014 | 145 views

So many things could cause this?
Do you have the check light on? If yes please scan it.
Meanwhile, check the fuel line, could be that youdon't have enof fuel, or maybe the fuel filter is clogged or you added a sub standard fuel additive into your tank. And also you might need a tuneup.
I hope this help

1999 Saturn SL | Answered on Apr 02, 2014 | 30 views

Not finding what you are looking for?
1999 Saturn SL Logo

1,795 questions posted

Ask a Question

Usually answered in minutes!

Popular Products

1998 Saturn SL
1998 Saturn SL

931 Questions

2000 Saturn SL
2000 Saturn SL

941 Questions

1997 Saturn SL
1997 Saturn SL

851 Questions

1996 Saturn SL
1996 Saturn SL

599 Questions

1993 Saturn SL
1993 Saturn SL

85 Questions

Top Saturn Experts


Level 3 Expert

85219 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Are you a Saturn Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides