1998 Toyota Corolla



February, 29, 2008 AT 7:13 AM

I am very sorry it is a 98 corolla I always get it confused with my 240sx(1989).

1998 corolla the OBD-II code is P0105 Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction

what does that mean?[/Quote: d194c0b906]

It means the MAP sensor is not working. Usually when a sensor is out of range, the PCM sets a default value to keep it running (not very smooth) this default value is usually rich to prevent damage with a lean condition (rich is bad also but not as bad as lean).

So it may be that the engine is flooded because the MAP is setting the fuel at maximum.

Check the plugs for gasoline, the MAP sensor connection (electrical and vaccum) and the fuel pressure with a mechanical gauge.



March, 6, 2008 AT 7:10 PM

Fuel pressure is 50 at cranking, then it levels off at 40... how about the fuel damper?? is right on the fuel rail before the injectors... could this be the problem? look at picture.. any suggestions?? thanks




March, 7, 2008 AT 1:11 PM

If the engine can start check the pressure with and w/o the fuel pressure regulator. Also inspect the vacuum hose for vacuum and if gas is present in the vacuum hose FPR defective.



March, 8, 2008 AT 3:25 PM

It would be hard to remove the fuel pressure regulator because is with the fuel pump, and I'm getting 50lbs pressure, so is with in specs. What I decided to do is to remove the fuel pressure resonator the one on the picture and cap the hole with a cork and tie wrap. Crancked the engine and Wooam, the car started. Total cost of my troubleshooting.
$64 map sensor (I broke the holder my fault)
17 Service Manual
2.50 T adaptor to rig fuel gauge
4.50 Fuel hose
3.00 clamps
Free Fuel gauge (I used my old A/C gauge)
128.99 Regulator damper

$219.99 total
but the knowledge gained priceless, the satisfaction to have fixed it priceless, thanks to all the people on this board that helped me out with this.

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