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Old 07-02-2005, 03:34 PM   #1
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Default Misfire problems only under heavy throttle

I'm having some issues with misfiring, so I replaced the spark plugs cause it was well past the time for a tune up (AC Delco Iridium plugs) and it is still misfiring, I noticed that the MAP sensor seems to be loose the seal into the manifold may be loose, could that be causing the misfire under acceleration?

It is likely my fault from when I changed the PCV valve I pulled the MAP sensor off the housing but when I did the clips broke although at the time seal was quite tight it is looser now.

Anyone know what the part number for the AC Delco brand sensor is I tried searching on GM parts direct with the number on top of the sensor but nothing came up. Also anyone know the part number for the PCV valve retainer thingy that holds the MAP sensor I need to replace that due to the broken clips

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Old 07-02-2005, 09:44 PM   #2
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Good luck...someone will be along soon with teh part number. I can't search GMPD to save my life.
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Old 07-06-2005, 04:47 PM   #3
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Here'* what I found at AC Delco

MAP Sensor:
213-1520

Connector, 3-WAY FEMALE GRAY
PT1799

Connector, 3-WAY MALE BLACK
PT1035
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Old 07-06-2005, 09:27 PM   #4
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thanks, anyone have any ideas about the plastic part the MAP sensor goes into? it would be the piece that holds the PCV valve in as well.

Oh and the misfire problem was definately the MAP, I sprayed mine with a bit gasket sealer to help it stay in tight and now the misfire has gone away.
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Old 07-06-2005, 11:17 PM   #5
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That is great...good job
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