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Pontiac Forum: MAP sensor
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  #1  
Old April 19th, 2018, 03:08 PM
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MAP sensor

Hy,

On my sunbird 2.0 LE is a MAP sensor. This one is not connected. It is a new one. If i connected the sensor, the motor don't start. Or , when the motor run and i connect the sensor, then the motor shut down.
Somebody knows this problem?
Thanks for hulp.
Greettings from Belgium.
Rudy
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Old April 19th, 2018, 03:56 PM
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do you know how to read obd1 codes?
when is the last time the fuel filter was changed?
can you do a fuel pressure test?
any broken or cracked vacuum lines?
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Old April 19th, 2018, 05:34 PM
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https://itstillruns.com/troubleshoot...r-4478865.html



Doug in P.R.

Last edited by 92 Sunbird LE; April 19th, 2018 at 05:40 PM.
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Old April 19th, 2018, 05:44 PM
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http://troubleshootmyvehicle.com/gm/...map-sensor-1#4

Doug in P.R.
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Old April 28th, 2018, 12:41 PM
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thanks everybody,
I try to chek the OBD code with a paperclip the next day.
tommorow i must drive about 250 miles without the MAP sensor. the car use now 30L/ 100M.
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Old April 30th, 2018, 04:57 AM
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Hello,

I tryed to check the OBD1 with a bridge between A and B (found on internet) But it doesn't work.
The Check engine light burns but doesn't flash and the motor ventilator run.
The vacuum line is ok, also the fuel filter.
i can't check the fuel pressure but the engine gets to much fuel (black smoke).
The MAP test : On B an ground 4.7v and degrease with vacuum.
The ground test give 9.4V and the other 7.4v.
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Old April 30th, 2018, 09:07 AM
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check the vacuum line going to the fuel pressure regulator. If you see gasoline in the vacuum line replace the fuel pressure regulator.
check the fuse for the cigarette lighter to see if it is burned out. On newer cars that fuse powers the OBD port.


Vérifiez la ligne de vide allant au régulateur de pression de carburant. Si vous voyez de l'essence dans la ligne de vide, remplacez le régulateur de pression de carburant.
Vérifiez le fusible de l'allume-cigare pour voir s'il est grillé. Sur les voitures plus récentes qui fusible alimente le port OBD.
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Old May 3rd, 2018, 01:52 PM
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Could also be a bad O2 sensor, bad coolant sensor or a bad EGR valve. Any of these could make it rich ( use more fuel)

Letting it run rich for a long time will eventually clog the catalytic converter.

Doug in P.R.

Last edited by 92 Sunbird LE; May 3rd, 2018 at 01:57 PM.
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Old May 4th, 2018, 05:55 PM
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http://easyautodiagnostics.com/gm/2....gen-sensor-1#1

https://www.yourmechanic.com/article...erature-switch

https://axleaddict.com/auto-repair/B...-Do-About-Them

Doug in P.R.
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