Question about 2001 Saab 9-3

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What does a temperature sensor do

Car will not start from cold. fuel pump checked and is fine, starter motor is fine, plugs were changed because space was too wide and were sooting up. car starts when warm.

Posted by Anonymous on

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  • 274 Answers

I am assuming this car has fuel injection. The temperature sensor tells the computer what the engine temperature is so it can alter the fuel mix. If it is dead the computer will not know whether the engine is hot or cold. When the engine is cold and the sensor is working fine the computer will send more fuel to the injectors sort of like the choke does on a carburettor. If the sensor is dead it won't, so it will be like trying to start the engine with no choke, ie: nearly impossible so it is a very important part of the engine and will do exactly what you are describing your problem to be. Get it checked!

Posted on May 30, 2014

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: car wont start, it turns

Check direct ignition cassette. If you smell like burning electrical needs to be replaced

Posted on Jul 30, 2008

  • 1 Answer

SOURCE: saab 900 s

what kind of car do you have?
Is your car with distributor or electrical egnition?
the fuel pump is not the at fualt.
in your son car are only two common problems or electricity does not come. Or fuel does not come good like is supose to come.

Posted on Aug 03, 2008

Saaboheme
  • 76 Answers

SOURCE: 96 Saab 900S SE Turbo won't start in the cold weather

You need to do four things:
Replace the plugs and make sure they are the correct ones gapped dead on to spec (1 mm). Use lots of silicone dielectric grease in the plug boots when reinstalling the DIC over the plugs.
Check the DIC
Check the CPS (crankshaft position sensor).
My money is on the CPS. The car may or may not start and run with a failing CPS (which is maintenance part, meaning it will fail over time). This, and the DIC, are known failure parts. The CPS is located on the right front lower corner of the engine block and secured with a single Torx screw (T27 or 30 IIRC).
Finally, the fuel pump may be on its way out, but I hope not as it is expensive to correct. They are good for 100,00 to 120,000 miles.

Posted on Nov 25, 2008

  • 35 Answers

SOURCE: We purchased a 1998 Saab 900 SE Turbo for my son.

Hi!

I'm sad to hear that you're having so much trouble with the car :(

Your problem is (almost certainly) not related to the alternator or the starter.
Your engine seems to lack fuel, air or spark, either due to a clogged hose/valve somewhere or a quirky electrical connection/relay.

Have you made sure that the fuel pump is supplying sufficient pressure when the problem is present?
Can you hear the pump when turning on the ignition?
If the pump (and its relay) seems ok you should make sure you have spark when the problem is present. If there's no spark the problem should be easily traced, probably to a intermittently faulty sensor or a faulty coil.
If both fuel and spark check out ok there is probably something wrong with the air supply when attempting a warm-start.

The things mentioned above are things you can check out yourself without high costs or special tools (you'll need a multimeter if you want to check voltages, but that's a cheap tool that might come in handy).

Oh and the car also has a check valve to keep pressure in the fuel lines. These valves can cause problems similar to yours, so you might want to check it out.

Good luck mate!

Posted on Jul 05, 2009

  • 3 Answers

SOURCE: Cold Starting

You have a cold start injector that is controled by coolant temp and more than likely the sensor, which is located center of intake, between #2 and 3 injector...it looks a bit like a reg. temp. sensor and will have either blue or black electrical harness connected to it. This sensor 'tells' the cold start sensor, a fifth injector for cold starting, when coolant is below a certain temp and gives extra gas. Try to find one at a junkyard, otherwise, www.getcoolparts.com about $80 new. Better yet, buy a Bentley manual and there's diagnostics using a multimeter on diagnosing specifically. I have an 88 but it is an N/A, not a turbo and is an 8v...if your's is a 16 valve, look for sensor in same spot but under fuel rail/injector area.

Posted on Feb 12, 2010

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99 isuzu trooper 3.0D difficult to start any morning when the engine is cold, when it does start it has a rough idle and sometimes cut out difficult to start again. both throttle sensors have been changed...


Engine is difficult to start when cold
  1. Check the battery condition, battery state of charge and starter motor current draw. Replace the battery if marginal and the starter motor if the current draw is beyond specification.
  2. Check the battery cable condition. Clean the battery terminals and replace corroded or damaged cables.
  3. Check the fuel system for proper operation. A fuel pump with insufficient fuel pressure or clogged injectors should be replaced.
  4. Check the engine's tune-up status. Note the tune-up specifications and check for items such as severely worn spark plugs; adjust or replace as needed. On vehicles with manually adjusted valve clearances, check for tight valves and adjust to specification.
  5. Check for a failed coolant temperature sensor, and replace if out of specification.
  6. heck the operation of the engine management systems for fuel and ignition; repair or replace failed components as necessary.
Engine is difficult to start when hot
  1. Check the air filter and air intake system. Replace the air filter if it is dirty or contaminated. Check the fresh air intake system for restrictions or blockage.
  2. Check for loose or deteriorated engine grounds and clean, tighten or replace as needed.
  3. Check for needed maintenance. Inspect tune-up and service related items such as spark plugs and engine oil condition, and check the operation of the engine fuel and ignition management system.

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The colt won,t start when cold if it is plugged in for a half hour or more it starts fine.We have changed the two temperature sensors and checked the fuel pressure


ON A 92 MODEL CAR IT DOESN'T HAVE A CHOKE SO YOU ARE GOING THE RIGHT WAY BY LOOKING AT THE TEMP SENSOR. THE CHOKE ON A FUEL INJECTION MOTOR WORK THROUGH FUEL TRIMS. IN OTHER WORDS MORE FUEL THEN AIR THAT WOULD BE A RICH CONDITION THATS CHOKING THE CAR. SO IF YOU HAVE CHANGED THE TEMP SENSOR TO THE COMPUTER YOU MUST CHECK TO SEE IF IT IS WORKING RIGHT, TO DO THAT PLUG A COMPUTER IN AND READ DATA,IT SHOULD READ AT COLD START UP OUTSIDE TEMP.ONE MORE THING MAKE SURE THE VOLTAGE IS GOOD ON VEH BECAUSE IT TAKES LESS VOLTAGE WARM THEN COLD.AND IT WILL TURN OVER FASTER WARM. IF SO REPLACE THE BATTERY TO A HIGHER COLD CRANKING AMP BATTERY. HOPE THIS HELPS YOU TIM

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My 04 bmw ignition doest start


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If it cranks no start look for spark plugs, wires, distributor cap, coolant temperature sensor, O2 sensor, fueling system (fuel pump cutoof switch, fule pump relay, fuel filter).
Please kindly let me know if you need more information, or kindly provide me with more details to assist you better
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Feb 01, 2009 | 2004 BMW 5 Series

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My 2000 s-10 will not start when it's cold outside.


It might be coolant temperature sensor or O2 sensor.
Also check the grounding cables. Is it dead completely or crank no start. If it is not cranking it can be starter.
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Please kindly let me know if you need more info
I am always here to help
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