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Anonymous Posted on Apr 30, 2017

04 saturn L300 acceleration dies

When the car reaches a speed of 70 mph the acceleration dies. Car can travel at speeds less than 60 but once is goes past 70 mph the car sputters and the check engine light comes on, the acceleration dies and the car slows down till it stops. I turn the car off for 10 minutes then restart and I can move again but the acceleration takes a while to get up to even 50. After the car rests for hours the car acceleration returns to normal the engine light goes off but will only stay normal if I stay under 60 mph.. Im sure its fuel pump issues but please help...

1 Answer

Bill Boyd

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  • Saturn Master 53,816 Answers
  • Posted on Apr 30, 2017
Bill Boyd
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Joined: Jan 04, 2013
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Run the fault codes first to check for faulty sensors
what you describe indicates a problem in the exhaust in that when the exhaust gas volume reaches a certain level the sensors are reporting it and the ECM is not able to fix it
have an accredited exhaust shop check the cat converter
for failure and partially blocking the exhaust at speed
if it was a fuel pump you would run into problems long before the speed at which it occurs
AT best it could be an EVAP problem with the vent not working properly but I think that it is exhaust related

5 Related Answers

Anonymous

  • 319 Answers
  • Posted on Mar 20, 2009

SOURCE: 1993 Saturn SL2 will not shift into highway gear

Saturn says and I quote

there transmission fluid is not to be changed after the first change at 6000 miles.

Now I say it should be changed at every 30000 miles. If changing out the fluid doesn't work then you need to go to a transmission repair shop.

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Anonymous

  • 73 Answers
  • Posted on Apr 09, 2009

SOURCE: 2003 Saturn L300 indicator lights stay on: ABS, SES...etc

first problem, went to autozone. the guy that looked at your car was making pizzas last week. they pull codes and sell you every part you will buy. take the car to the saturn dealer and replace the bcm.

Anonymous

  • 186 Answers
  • Posted on May 12, 2009

SOURCE: will not start after it stalls untill about 5-10 minutes

Your problem is most likey your intake gasket.They have a problems on the SOHC engines where the intake gasket shifts & starts leaking vacuum at the #1 intake runner causing a missfire on Cylinder #1.While the engine is Idling buy some throttle plate cleaner & spray throttle cleaner down at the #1 Intake runner where the intake meets the head.If engine stalls or runs rougher that's your problem.I have replaced dozens of those gaskets for tha reason!! They have a beter design gasket through saturn parts.It has a coating on it to prevent reoccurance.Also you should check you Coolant Temp Sensor,if it's ceramic it's most likely bad.Replacement is brass from saturn.Good Luck

Anonymous

  • 1 Answer
  • Posted on Aug 20, 2009

SOURCE: Car dies

Disconnect the vacumm line to the EGR valve and plug the hose. If this solves the problem then your valve is bad.

Fixitman909

Tommy Thomas

  • 430 Answers
  • Posted on Aug 29, 2009

SOURCE: I have a 2006 Saturn Ion and the check engine

try resetting pc disconnect neg cable for 5 mins and retry gl

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PROCEDURE 1
EVAPORATIVE EMISSION SYSTEM LEAK MONITOR
Inspection Conditions
Engine coolant temperature: 30°C (75°F) or less (The engine is stopped before the test drive is started).
Atmospheric temperature: 5 - 30°C (41 - 113°F).
Condition of A/T: Selector lever D range.
Fuel remained in fuel tank: 30 - 50% is recommended.
Time required: 16 minutes or less after started the engine.
Drive cycle pattern: One trip monitor (from start to ignition switch to "LOCK" (OFF) position. Well be completed while traveling with the following drive cycle pattern.
Test Procedure
Engine: start.
Accelerate until the vehicle speed is 89 km/h (55 mph) or more.
While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 89 km/h (55 mph) or more and travel for 16 minutes.
Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.

PROCEDURE 2
FUEL TRIM MONITOR
Drive Cycle Pattern
Inspection Conditions
Engine coolant temperature: 100°C (212°F) or less.
Atmospheric temperature: -10 - 60°C (14 - 140°F).
Condition of A/T: Selector lever D range.
Time required: 30 minutes or more.
Drive cycle pattern: One trip monitor (from start to ignition switch to "LOCK" (OFF) position). Will be completed while traveling with the following drive cycle pattern.
Test Procedure
Engine: start.
Accelerate until the vehicle speed is 89 km/h (55 mph) or more.
While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 89 km/h (55 mph) or more and travel for 30 minutes.
Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position

PROCEDURE 3
CATALYTIC CONVERTER MONITOR
Drive Cycle Pattern
Inspection Conditions
Atmospheric temperature: -10°C (14°F) or more.
Condition of A/T: Selector lever D range.
Engine coolant temperature: Not set.
Time required: 16 minutes or more.
Drive cycle pattern: One trip monitor (from start to ignition switch to "LOCK" (OFF) position). Will be completed while traveling with the following drive cycle pattern.
Test Procedure
Engine: start.
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PROCEDURE 4
HEATED OXYGEN SENSOR MONITOR
Drive Cycle Pattern
Inspection Conditions
Engine coolant temperature: 100°C (212°F) or more.
Atmospheric temperature: -10°C - 60°C (14 - 140°F) or more.
Condition of A/T: Selector lever D range.
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PROCEDURE 5
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Drive Cycle Pattern
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