Loss of power

Tiny
DJESKE
  • MEMBER
  • 2002 SATURN SL2
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 234,000 MILES
2002 saturn sl2 loss of power, not shifting properly. Replaced o2 sensor, oss, ckp, checked the catylitic converter, replaced transmission, replaced 2 exhaust valves and machined the head. Vehile is not shifting properly, loss of power
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Saturday, April 2nd, 2011 AT 5:04 PM

47 Replies

Tiny
SATURNTECH9
  • EXPERT
Do you have any code's?What year model did you get the transmission from?How did you check the three cats your car has?
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Saturday, April 2nd, 2011 AT 6:09 PM
Tiny
DJESKE
  • MEMBER
No codes come up. Tranny was the same 2002 sl2 with 127,000 on it
What did you mean by 3 cats?
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Saturday, April 2nd, 2011 AT 6:17 PM
Tiny
SATURNTECH9
  • EXPERT
Oh sorry I thought I read that you had a L model saturn. On your exhaust manifold do have a cat?Also how did you check your cat?How is the transmission not shifting properly the more details the better since I can't test drive it or see it. Paint me picture.
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Saturday, April 2nd, 2011 AT 6:22 PM
Tiny
DJESKE
  • MEMBER
Our car is a saturn sl2 duel overhead cam. We made sure the main exaust cat coverter was not blocked. The car acts like it is in a limp-home mode. Loss of power in all gears. While driving rpm go high if you let off the accelerator they come down and the car will shift. Gets real boggy when trying to accelerate.
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Saturday, April 2nd, 2011 AT 7:26 PM
Tiny
SATURNTECH9
  • EXPERT
So had a exhaust back pressure test ran on your car when it had those issues?Because it really sounds like a plugged cat. There is no limp mode for that car.
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Saturday, April 2nd, 2011 AT 9:04 PM
Tiny
DJESKE
  • MEMBER
To save money could I unhook the exhaust at the manafold in order to test it.
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Saturday, April 2nd, 2011 AT 10:25 PM
Tiny
SATURNTECH9
  • EXPERT
Do you have a cat on your exhaust manifold it would be hard to miss it would be right below the exhaust tubes where they all come together an the bottom of the manifold?I have dropped the down pipe before and seen if the cat was clogged that way. You just don't want to run it that long like that. The back pressure gauge sets are about 40.
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Sunday, April 3rd, 2011 AT 12:25 AM
Tiny
KYLEYCOYOTE
  • MEMBER
Turns out the first cat came apart and plugged up the second one. Replaced it and its all good. Thanks so much for the help
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Monday, January 14th, 2019 AT 5:27 PM
Tiny
PUMPHED
  • MEMBER
  • 2002 SATURN SL2
  • 145,500 MILES
My saturn starts fine when cold. If I let it idle for a few minutes it starts to miss and eventually just dies. You cannot restart it until it cools down. The temp gauge shows a rapid increase in temp but it remains in normal range and does not indicate overheating. (No numbers. Just deflects to the middle mark on the gauge between cold and to hot). No check engine light. Oil preasure ok. Fluids all ok.
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Monday, January 14th, 2019 AT 5:29 PM (Merged)
Tiny
SATURNTECH9
  • EXPERT
So from being cold to the half way mark on the temp gauge of idling how long does that take?Those cars are known for bad coolant temp sensors and the connectors getting corroded from coolant leaking into them. They are also known for bad crankshaft position sensor going bad causing dieing and not starting till they cool down. So when it dies and wont start see if it has spark?Also any codes?
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Monday, January 14th, 2019 AT 5:29 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
I need you to check if there is fuel and spark getting to the engine when it doesn't start. At least one will be missing. Once I know that, we can focus on that circuit. If you need directions, go to our homepage for detailed instructions and a video.
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Monday, January 14th, 2019 AT 5:29 PM (Merged)
Tiny
THOMAS.JMCC
  • MEMBER
  • 1997 SATURN SL2
Had to disconnect the wires under the steering column of a 97 saturn sl2. The wires went two places, 4 wires (red, orange, yellow and black) connected to some wires underneath the steering wheel. The other 4-6 (white, green, red, and a plug that consisted of both a brown and blue wire) went to some other wires under where the car radio would be, and connected just right under the cup holder area. There were two small black and blue wires grounded. All of these wires were connected to a white plug that seemed to be meant to plugged into another part which I don't have. After these were disconnected, there has been no power to the car at all. Can someone provide me instructions on which wires to connect where so that the car may start again?

In addition, this was all initiated because of my car not starting in the first place. I believe it's due to the security system of the car, considering the car's headlights and dome lights would work, but the radio wouldn't turn on and the car never attempted to start (wouldn't turn over, when the key was turned to run, it would just go quiet). Should the system be removed, or is there a way to bypass this fault so that I can start the car again?
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Monday, January 14th, 2019 AT 5:29 PM (Merged)
Tiny
SATURNTECH9
  • EXPERT
Are you the same person who asked about your alarm went off after unlocking the drivers door with the key. Then it wouldnt start from that point on?Also why were all these wires cut?What was installed?
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Monday, January 14th, 2019 AT 5:29 PM (Merged)
Tiny
THOMAS.JMCC
  • MEMBER
No sir, the wires weren't cut, a new radio was installed but removal of those wires were not related to the new radio installation. The security system has never gone off prior to this.
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Monday, January 14th, 2019 AT 5:29 PM (Merged)
Tiny
SATURNTECH9
  • EXPERT
Alright iam confused so are the wires to the ignition switch cut?Also the connector under the cup holder cant think of one that would keep the car from starting. Were you talking about the wires to the inside fuse box?Any pics you could post?Have you checked all the fuses inside and outside?
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Monday, January 14th, 2019 AT 5:29 PM (Merged)
Tiny
THOMAS.JMCC
  • MEMBER
Here are some Pics

Pic 1: Where the first 4 plugs connect, under the steering wheel, this is directly under the steering wheel. I have connected some of the plugs as you can see, but I'm not sure if they're correct. The wires with blue connectors on the end are on the same long wire as pic 3.

Pic 2: These are the 4 connectors I found that can be accessed by removing the cupholder. These wires are right next to the fuse box on the passenger side of the vehicle.

Pic 3: This is what needs to be connected to those 4 connectors that are in pic 2. I don't know which color connects to which. The 2 wires off to the side were grounded to a metal bar located near those wires in pic 2.

Pic 4: This is where all the wires seem to run from, the one connector that was unplugged when I bought the car. The green and red wires were cut when I bought the car.

I just have to find out which colors connect to which colors so I can get power to the car again! The power locks don't work, there's no chime, no lights, nada
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Monday, January 14th, 2019 AT 5:29 PM (Merged)
Tiny
SATURNTECH9
  • EXPERT
You just want to get rid of that after market alarm correct?It looks like the only wires they really cut into are the ones going to the ignition switch correct?What color wires going to the ignition switch did they actually cut into?I dont care about the ones they just added those T taps too. All the wires that have the blue connector ends on them that are plugged into the red T taps just unplug them. From behind the inside fuse box and on thr steering column.
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Monday, January 14th, 2019 AT 5:29 PM (Merged)
Tiny
JOHN GRIMES
  • MEMBER
  • 2000 SATURN SL2
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 134,000 MILES
When I'm driving the car will lose power and stall. I just had it tuned up all filters were changed the wired were changed and the fuel pump was changed. It happens off and on but not all the time
Thanks

I had the computer check the car and the folling codes were listed ; PO 171, PO 507, PO 1599
Thanks
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Monday, January 14th, 2019 AT 5:29 PM (Merged)
Tiny
SATURNTECH9
  • EXPERT
When the car stalls will it restart right away the more details the better. Also go to a auto parts store like auto zone and have them scan your car for code's. If you have any codes let me know what numbers they are.
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Monday, January 14th, 2019 AT 5:29 PM (Merged)
Tiny
SATURNTECH9
  • EXPERT
The pics really helped by the way now I know what your talking about. The yellow wire they cut into going to the ignition switch you can cut out the two wires they spliced into the two ends of the yellow wire. Then reconnect the yellow wire like it was from the factory. That will restore your starter wire coming from your ignition switch.
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Monday, January 14th, 2019 AT 5:29 PM (Merged)

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