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Old 03-25-2009, 09:13 PM   #1
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Default Map Sensor Problem

Here is my problem.... Week ago when I went to start my SW2 in the morning, it did not want to start. I had to give it gas, so it would start and had to give gas so it wouldn't die (puff of white smoke came out)

Ran it for codes and code P0108 came up, which is the Map Sensor. Replaced the Map Sensor and ran fine, no problems. Until a few minutes ago when I went to move it. Now it does the exact same thing, can't believe its the Map Sensor goig bad again? What can be causing it to go bad, harness/wires?
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Old 03-25-2009, 09:31 PM   #2
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Default Re: Map Sensor Problem

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Originally Posted by sees View Post
Here is my problem.... Week ago when I went to start my SW2 in the morning, it did not want to start. I had to give it gas, so it would start and had to give gas so it wouldn't die (puff of white smoke came out)

Ran it for codes and code P0108 came up, which is the Map Sensor. Replaced the Map Sensor and ran fine, no problems. Until a few minutes ago when I went to move it. Now it does the exact same thing, can't believe its the Map Sensor goig bad again? What can be causing it to go bad, harness/wires?
Have you ever changed the ECTS (engine coolant temp sensor)??
...
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Old 03-25-2009, 09:49 PM   #3
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1996 SW2
Default Re: Map Sensor Problem

I did change it a few months ago... But its running exacting like it did a week ago and trying to find out what could be causing it to go bad. Just ran it for codes again and the same code P0108 came up again
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Old 03-25-2009, 09:54 PM   #4
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Default Re: Map Sensor Problem

Clean out the port under the MAP that runs into the intake.
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Old 03-25-2009, 10:05 PM   #5
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Default Re: Map Sensor Problem

Yep. I was thinking to clean out the MAP port.

Kind of wondering if a high signal from the sensor means a high vacuum pressure.

Is there a way to get too much vacuum in the Intake Manifold?
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Old 03-25-2009, 10:20 PM   #6
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Default Re: Map Sensor Problem

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Yep. I was thinking to clean out the MAP port.

Kind of wondering if a high signal from the sensor means a high vacuum pressure.

Is there a way to get too much vacuum in the Intake Manifold?
low signal = high vacuum
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Old 03-25-2009, 10:31 PM   #7
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Default Re: Map Sensor Problem

check vacuum hoses if you have the older aluminum intake DOHC. Clean MAP sensor port if you have the later composite DOHC engine. You might also check for a sticking IAC Valve and clean that while your at it.
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Old 03-26-2009, 11:49 AM   #8
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Default Re: Map Sensor Problem

Alright I'll clean the port out and check out IAC... Its a 96 SW2, btw
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Old 03-26-2009, 11:54 AM   #9
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Default Re: Map Sensor Problem

Yes there is a short port under the MAP on that intake.
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Old 03-26-2009, 03:40 PM   #10
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Default Re: Map Sensor Problem

Thought I had cleaned the port (shot it with some tb cleaner) when I replaced the Map Sensor, but that wasn't the case at all... stuck a few cotton swabs in the port and there was alot of carbon in there. I stopped though because I didn't want the cotton coming off and getting stuck in there (Was using TB cleaner with the swabs)

Any better ideas of how to clean that port out? The wagon is running fine again
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Old 03-26-2009, 03:51 PM   #11
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Default Re: Map Sensor Problem

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Originally Posted by sees View Post
Thought I had cleaned the port (shot it with some tb cleaner) when I replaced the Map Sensor, but that wasn't the case at all... stuck a few cotton swabs in the port and there was alot of carbon in there. I stopped though because I didn't want the cotton coming off and getting stuck in there (Was using TB cleaner with the swabs)

Any better ideas of how to clean that port out? The wagon is running fine again
not sure what others use, but how about drill bit, dont mean to enlagre the hole, but one that just fits, that way the hole is same all way down. wouldnt hurt to lube the bit with TB cleaner.
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Old 03-26-2009, 04:32 PM   #12
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1998 SC2
Default Re: Map Sensor Problem

Compressed air works real well or a round bristle brush. Just run it in there dry and it will get all the stuff out of the way. Use a fiber or plastic bristle just a bit larger than the port its self. Usually can find one at the hardware store of sometimes in housewares at Walmart.
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Old 03-27-2009, 07:35 PM   #13
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Default Re: Map Sensor Problem

Wow.. a small bristle didn't come to mind, going to try that. On the drill bit idea, I felt a small curve in the there, while I using the swabs, so don't think drill bit will work. Appreciate the help guys!
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Old 03-27-2009, 09:31 PM   #14
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Default Re: Map Sensor Problem

Cleaned mine yesterday with a small, eyeglass screwdriver and shot it with some electronics cleaner spray. Didn't know what was under there so I used that just in case.
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Old 03-27-2009, 10:30 PM   #15
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1998 SC2
Default Re: Map Sensor Problem

There is a curve in it, don't drill! Actually, you can push the crud out with a tie wrap. Use the pointed end or it will get caught by the bend.
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