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Technical question . . . Need help !

Discussion in 'General Chevy & GM Tech Questions' started by JTWard, Aug 19, 2013.

  1. JTWard

    JTWard Member

    I'm getting ready to change some of the sensors on my 1990 1500 305 V8 and of the tasks is 1. A new "Idle Air Control Module, 2. a new "Manifold Absolute Pressure Sensor" and finally, 3. a new "PVC Valve". After doing these jobs, should I leave the battery hooked up and remove the ECPM fuse in or take it out for a minute, or disconnect the negative battery cable for a minute ? I realize I'll need to take the truck out for about 50 miles for the EPCM to "relearn" the settings ? Thank you ! :neutral:
  2. zippstripp

    zippstripp New Member

    Disconnect battery for 30 seconds to a minute
  3. JTWard

    JTWard Member

    I bought a Delphi Idle air control unit, and it came with a tough red cap over the threaded part of the sensor and over guarding the pintle, Am I correct that the Pintel come pre-set? I measured it and it's 31/32 of an inch from the flange of the unit to the top or point of the pintle itself. I don't want to screw this up by tinkering with it if it's pre-adjusted? Thank you !
  4. JTWard

    JTWard Member

    I went and got another idle control module and I'll install it over the weekend, but this sure is a PITA problem !
  5. MAD JAX

    MAD JAX New Member

    Sounds to Me like You're throwing parts at it for some specific problem ~ lemmie guess: It ain't idling right : ?

    If You've got a manifold vacuume problem so overwhelming that the IAC can't compensate AND the MAP is out-of-range You should find 'n fix THAT before anything else ~ and It could-well be a PCV problem too~! BE SURE You've got the correct PCV valve for Your specific 8th digit V.I.N. Engine application ~ I can't tell you how many engine performance AND driveability problems I've diagnosed where someone simply installed the WRONG PCV valve during a "Tune-Up", etc. ~ AFTER having confirmed there is NO External OR Internal vacuume leak affecting iduction otherwise!

    Lastly ~ Gosh Yur purdy! (well, at least Your avitar is... ; ) That said: Be careful, Be SAFE ~ good-luck : ?
  6. JTWard

    JTWard Member

    Thank you, I'm pretty sure it's a vacuum leak somewhere too. I'll try using a unlit propane torch and see if I can find it. Yeah she is something else. I'd kiss the ground she walks on!
  7. RayVoy

    RayVoy Active Member 1000 Posts

    Long distance lust will get you in trouble, haha.

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