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Posted on Jan 02, 2017
The M.A.P. sensor is located on the upper intake manifold plenum. It has a plug with 3 wires connected to it, and a vacuum hose connected to it. to chek the sensor you'll need a volt meter. you can insert the positive lead into the backside of the terminal of the light green wire (with the plug still plugged into the sensor). Put the negative lead from the volt meter and ground it to a solid chassis ground. Turn the key to the on position (DO NOT START THE ENGINE). Your voltage should read 4.0 to 5.0 volts. Now start the engine. at idle your voltage should read 0.5 to 2.0 volts. If your volts read in those ranges your map sensor is good.
Posted on Apr 12, 2010
SOURCE: 1998 chevy suburban map sensor
Hi, The Map sensor on a Suburban is located.
Beside of the ignition coil. on the intake.
Is a litle sensor with a connector of 3 wires.
I hope this work for you. OK
Posted on Jul 03, 2008
Are you getting the check engine light? If so the electronics may have gone out. You may not need a rebuild but you won't know till you pull the oil pan on the transmission and inspect the contents. You may also have lost the neutral safety switch. It is mounted on the drivers side of the transmission. Check those out first and let me know what codes you get.
For Ponchoboy; the clunking and hissing you hear are teminal root causes. Drop the oil pan and if it has a lot of filings and metal it is time for a rebuild.
Hope this helps; Rate me highly;
Posted on Feb 09, 2009
this problem is caused in almost all cases by a failed actuator that moves the door insiode the heating/ac duct to change the outlet temperature, it is called the Air Temperature Control Blend Door actuator.
Posted on Oct 05, 2009
Under intake manifold on top of block,you need to remove intake to access sensors there are two of them you can't miss them when intake is off. After replacing sensors you need a new intake gasket.
Posted on Apr 04, 2010
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