Answer me this please!!

[Snake]

I am tired of keep geting the god forsaken!!!! P1400 MDP fault
My car idles great and runs good except after 4500RPM it stalls a bit but in a few days my S-AFC will arrive and after tunnig it Iam sure that there will be no more hesitation at high RPM.

But back to the issue in hand is there a way to FOOL the PCM so that the god@#$%& MDP(manifold difereantial preasure sensor) wont triger the P1400 fault(check engine ligth).

And please dont tell me to youst ignore it beacuse the CEL can always warn you of other problems in the engine I youst wan to know if there is a way to make it go away for good!!

Youst so that you know my EGR system is working ok and EVAP system is also ok.My car is some what moded also.
Once again is there a way to FOOL the PCM into not trigering the P1400 fault???

Or if there is something else besides the EGR or EVAP systems that is trigering it??

Thanks in advance.

 

[Snake]

Ok I did a bit more reaserch around here and found one post that recomended blocking of the EGR valve.(al do mine works ok)
I ask you if I do this will it prevent the darn P1400 from poping up again.
By the way I dont care about emission I youst want to get rid of the darn CEL once and for all!!!

 

[Snake]

Please!!
Someone give a straigth answer!!
Will blocking the EGR valve stop the PCM from trigering the P1400 code?????

 

[Defiant]

Have you replaced the sensor that's throwing the code?

 

[onyx1]

I blocked off my EGR and the code hasn't popped up since

 

[Snake]

I will try blockoing off the EGR tomorow and see what hapens.


By the way a new MDP sensor is a about 125$.
Also I did try checking the sensor like the repair manual said.
Measuring with my voltmeter I had a reading of 2.7vdc at idle and after opening the throtle plate and closing it fast it jumped to 4.7vdc.
Now the correct values given by the manual are 0.8vdc at idle and after opeming and closing the throtle 4.8vdc.

Has someone ever done this test before.
I most defenetly need to be sure that the MDP has gone bad before I go spend the 125$.

 

[Mitsuturbo]

MDP issues are almost ALWAYS because of an EGR malfunction... usually in the solenoid. At the Dealership here in Utah i had to replace many of them on the 3g, 2g and many Hyundai.