Map Sensor Testing

thanks

Hey, Rich; love your Saturn videos. I have a '95 SL1 that surges and stalls, won't give any power when given gas. Starts about 5 minutes into my morning drive, and then stops 1-2 minutes later. Runs fine otherwise. The error I got this morning were the MAP and MAF errors- normally I don't get error codes. Any tips? Clean the MAP? Replace the MAF?

where did you fix the ground black wire of multi meter

Thank you Rich, your videos are excellent. Appreciate you taking the time to make them.

great

Thank you very much for showing this procedure. It is so great that you took the time to show what you know and be straightforward about it.
-Foxx
=^.^=

richpin06a: I have just purchased Delco Map sensor for my 1998 SL1.  It did not come with that red silicone seal.  What is that called so I can order a new one on the net?

Good work.

I remember from school, when we messed with IC's, that all the computer stuff ran on 5 volts.

is it just me or does this guy sound like peter griffin from family guy

what if I'm reading 4.76 without pressure?

So why does the engine surgi?
You said that what usually cause'es it, and you claim it shows working .
Please help me out here...
I have a 08 saturn outlook xe, that the service traction control, and stabilitrak light comes off and on, vehicle surges at idle bad 

@richpin06a, I have tested MAP sensor for a Corolla 99 , when I test and apply pressure the voltage increases instead of decrease.. and also when just tested ground and sensor wire it has a voltage of 4 volts instead of 5 v..

I don't know if all MAP sensor should decrease voltages or if some does the other way around.

Good job like

hi can you please help. i have my mates sons van it is showing fault po100 /po110 / po235
But it will not start from key.
Can you please advise
regards
stan

Hi not sure if you are still responding to comments on this video but i have a query. I tested my 3 bar MAP sensor on my 1991 sierra cosworth but when i connected my vacuum tester & tried putting a pressure in my MAP so i could check the voltage values it wouldnt hold a pressure at all, i take it that this means my sensor is shot. Thankyou in advance jason

Great video.  Did you put the paperclip in the left or center pin on the plug.  I got zero volts on the left and the correct readings on the center pin.

Thank you for the Info. I've got a ? My map sensor reads 4.72v and the engine doesn't run but the first thing is that the fuel pump went bad again, that has been replaced. I tried too start the engine, it run for a few seconds and shuts off, and the engine did surge and ate a lot of gas, can that low voltage being so low that it won't let the engine start?

Rich, if a MAP sensor is working properly, wouldn't a scanner live data reading of this sensor be able to tell you if you have a vacuum leak in your car?  This seems like the most direct and obvious method of testing if you have a vacuum leak, but I don't see anyone using this as a trouble-shooting technique.  Am I misunderstanding something and that there is a reason why the MAP sensor cannot be used for vacuum leak troubleshooting?

Thank-you for a beautiful demonstration. I was working on a 09 Cobalt and when tested got a reference voltage of 3.8V to start with and also with ever 5 In vac applied it would drop .6V....Hence i replaced the Map sensor and it solved the surging issue. Thanks a lot RicH!