Question about 2003 Saab 9-3

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I Need an ECU wiring diagram

Car will start then not start. Po201 code. we think that the fuel injector keeps getting flooded with fuel because the ECU is telling it to open but not close. There might be a possible electrical short in one of the ECU ground wires. If anyone has a color coded wiring diagram and some other suggestions, it would be greatly appreciated.

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  • Juan E Rodriguez Feb 13, 2014

    Hi Amanda Cox I was wondering if you got the problem with your saab fix. I also have a 2004 Saab 9 3 and i have the same proble you where having. I just wanted to know what ended been the.problem and how you fix it. thanks

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SOURCE: looking for a color coded radio harness diagram

1994 Saab 9000 Series Stereo Wiring Constant 12V+ White/Blue Switched 12V+ Yellow/Red Ground Black Illumination Brown/White Dimmer n/a Antenna Trigger Green Antenna Left Rear Front Speakers 6 1/2" Side Panels Left Front (+) Blue/Green Left Front (-) Gray/Black Right Front (+) Red/Green Right Front (-) Brown/Black Rear Speakers 6 1/2" Rear Deck Left Rear (+) Blue/Yellow Left Rear (-) Gray/White Right Rear (+) Red/Yellow Right Rear (-) Brown/White

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SOURCE: Audio Wiring Diagram 1995 Saab

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Hope this helps.

Posted on Apr 09, 2010

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3 Answers

The throttle body injector goes full on and floods the engine as soon as it starts.


This vehicle has no mass air flow sensor , it uses a MAP sensor for speed density fuel control , My self I would hook up a scan tool an see what the block learn an integrator or showing , this is same as fuel trims on OBD2 vehicles I would also look at the map sensor voltage parameter ! A bad map sensor can cause a lot of fuel to dump into the engine ! Manifold Absolute Pressure MAP Sensors

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1997 Nissan Sentra 4 cyl. Won't Start


That means bad injectors, or defective fuel pump, you probably need to replace the fuel pump.

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98 buick regal tries to crank but floods the plugs what is the problem


Yup. Fuel supply problem. Could be a number of things. Check if the injectors are clicking when you crank. no click, no power to the injectors, problem with sensors data to the Ecu. If click, that part is not the problem. More likely Fuel pressure regulator is bad, not enough pressure, or fuel pump relay which controls the fuel pump. So either may be bad or connections are bad or wires cut. Fuel filter may be clogged. To test th fuel pump, you can jump from the battery positive to pump terminal for a short time to verify the pump is good. so then connections at pump, or from the fuel pump relay or it's connections to the ECU. Most disastrous may be the Ecu itself. Other sensors to the Ecu could contribute, but usually with code problems including sensors it goes into a "limp home" mode. overriding bad sensor inputs. If somehow you can get the error codes read at auto parts store, that may give you more clues than I can guess at. Good luck, hope this helps you out. I gave this answer to another query, but most of it applies in the opposite way, you are getting too much fuel (we used to call it flooding)

Mar 28, 2015 | 1998 Buick Regal

1 Answer

Car starts and idols great but cuts out and dies when I give it gas, like it's flooded. Already changed fuel pump skreen and fuel filter. Air, fuel mixure?


  • too high fuel pressure. 30 ok 60 bad. PSI
  • leaking injectors
  • ECU injector driver shorted, turning on injectors full time
  • injector drive wire shorted to ground bad wiring.
  • ECT stuck at -40F (alaska temperature) USE a SCAN tool.
  • MAP sensor vacuum hose/pipe clogged (ECU thinks your are going up hill all the time and floods.
  • The scan tool can check each , but not fuel pressure.

that is a start,

Feb 20, 2014 | 1997 Toyota Corolla

1 Answer

1997 ford contour


hold pedal to floor and it tries to start ! Not sure if your vehicle has clear flood mode , Most vehicle have clear flood mode strategy programmed in the ECU , PCM ,ECM .when you hold the accelerator pedal to the floor the engine computer cuts down on the injector on time to clear a flooded engine .
Fuel pressure regulator problem ,maybe ! You say there was a blown fuel pump fuse an you replaced it ? Fuse's don't blow for no reason ? Fuel pump bad , short , too much current !
Disconnect the mass air flow sensor an see if it starts !

Apr 24, 2017 | Cars & Trucks

2 Answers

What will make the make it flood its self


An engine will flood if there's too much fuel going in because of a stuck choke, a bad spark not igniting the fuel, failed temperature sensors, bad fuel regulator, timing...the list goes on.

The amount of fuel delivered to a properly functioning injected car is determined by sensors mounted throughout the vehicles air intake system. These sensors work together along with the ecu to control the fuel / air mix delivered to the cylinders.

We would need to isolate the components that have impact on the duration of time the injectors stay open. In troubleshooting it is often best to work backwards.

1. Injectors - Are they leaking? 2. Pressure regulator - is the pressure at the fuel rail the right pressure?? (40psi for most fuel injected cars) 3. TPS- throttle position sensor- is this reading accurately...there are several different styles of these 4. Air flow meter - these also come in several varieties varys from mass air sensor / simple vane meters. 5. during startup there is a seperate circuit called the throttle bypass valve - this also may not be functioning if the flooding is occuring rapidly during startup. If the car starts and runs for a while than floods. this is probably not the culprit. 6. ultimately the ECU could have a problem as it is the link in the chain that ties everything together....though not likely. Any of these these would have the potential to flood a vehicle if they were not functioning properly. The amount of fuel delivered to a properly functioning injected car is determined by sensors mounted throughout the vehicles air intake system. These sensors work together along with the ecu to control the fuel / air mix delivered to the cylinders. We would need to isolate the components that have impact on the duration of time the injectors stay open. In troubleshooting it is often best to work backwards. 1. Injectors - Are they leaking 2. Pressure regulator - is the pressure at the fuel rail the right pressure?? (40psi for most fuel injected cars) 3. TPS- throttle position sensor- is this reading accurately...there are several different styles of these 4. Air flow meter - these also come in several varieties varys from mass air sensor / simple vane meters. 5. during startup there is a seperate circuit called the throttle bypass valve - this also may not be functioning if the flooding is occuring rapidly during startup. If the car starts and runs for a while than floods. this is probably not the culprit. 6. ultimately the ECU could have a problem as it is the link in the chain that ties everything together, but it's not likely.
This is just a list of things that could cause your car to flood!

Feb 24, 2011 | Mazda RX-7 Cars & Trucks

1 Answer

1987 chevy r20 carb with electric fuel injection


I would check the wires that make the injector function to see how much power is going to them (using a multimeter). Now check the wires on the injector that is not working and see if you have power there. If you do then you have a bad injector. I don't think you do since you said that you switch wires and you are getting fuel at that injector. Check your wiring harness for shorted out wires. It doesn't make sense for one side to be working and the other not to be. I don't think it is a problem with your ECU, but it may be. See what colors the wires are going to your injectors and trace them back to the ECU, a wiring diagram would help. You need to check to see if you are getting power from the control module to the harness. I believe, however, you are experience a shorted out wire somewhere in the harness. That is where I would start. If you confirm you are getting power to the control module, but you are losing it somewhere in the harness it may be easier to just run a new set of wires instead of tearing apart the harness.

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1998 Isuzu Amigo is getting no gas to the injectors, fuel is present at the injectors, node lights are indicating no pulses at the injectors, ECU checks out to be good, spray fuel in the intake and it...


Just because there is fuel at the injectors doesn't mean there is any fuel pressure. You need to check your fuel pressure and if is low or non-exisitant then you either have a clogged fuel filter or a bad fuel pump.

Nov 17, 2009 | 1998 Isuzu Amigo

1 Answer

Cranks but no start, no injector signal or spark


SEE IF YOU CAN PULL CODES AND DATA READINGS, IF YES MORE THEN LIKELY ECU OK. CHECK DIST. FOR PLUG FIRE AND INJECTOR PLUSATION, IF NO FIRE OR PLUSATION POSS. BAD IGNITION COIL OR MODULE.OHM COIL.

Nov 05, 2009 | 1994 Toyota Corolla

1 Answer

Truck turns over trys to start then wont


The amount of fuel delivered to a properly functioning injected car is determined by sensors mounted throughout the vehicles air intake system. These sensors work together along with the ecu to control the fuel / air mix delivered to the cylinders.
We would need to isolate the components that have impact on the duration of time the injectors stay open. In troubleshooting it is often best to work backwards.
1. Injectors - Are they leaking
2. Pressure regulator - is the pressure at the fuel rail the right pressure?? (40psi for most fuel injected cars)
3. TPS- throttle position sensor- is this reading accurately...there are several different styles of these
4. Air flow meter - these also come in several varieties varys from mass air sensor / simple vane meters.
5. during startup there is a seperate circuit called the throttle bypass valve - this also may not be functioning if the flooding is occuring rapidly during startup. If the car starts and runs for a while than floods. this is probably not the culprit.
6. ultimately the ECU could have a problem as it is the link in the chain that ties everything together....though not likely.
Any of these these would have the potential to flood a vehicle if they were not functioning properly.
The amount of fuel delivered to a properly functioning injected car is determined by sensors mounted throughout the vehicles air intake system. These sensors work together along with the ecu to control the fuel / air mix delivered to the cylinders.
We would need to isolate the components that have impact on the duration of time the injectors stay open. In troubleshooting it is often best to work backwards.
1. Injectors - Are they leaking
2. Pressure regulator - is the pressure at the fuel rail the right pressure?? (40psi for most fuel injected cars)
3. TPS- throttle position sensor- is this reading accurately...there are several different styles of these
4. Air flow meter - these also come in several varieties varys from mass air sensor / simple vane meters.
5. during startup there is a seperate circuit called the throttle bypass valve - this also may not be functioning if the flooding is occuring rapidly during startup. If the car starts and runs for a while than floods. this is probably not the culprit.
6. ultimately the ECU could have a problem as it is the link in the chain that ties everything together....though not likely.
Any of these these would have the potential to flood a vehicle if they were not functioning properly. I would run a diagnostic check on your vechile to isolate your exact problem

Aug 14, 2009 | 1997 Toyota T100

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