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    LOSTnNC's Avatar
    LOSTnNC Posts: 19, Reputation: 3
    New Member
    		  
    #1

    Oct 1, 2007, 01:11 PM
    OK you 1995 Chevy silverado Extended cab 5.7 liter with 4L60e automatic tranny
    OK here it This is what has been replaced Fuel pump and sending unit,idle air control valve(iav)map sensor,throttle position sensor plug wires ignition module Throttle Body was Cleaned and rebuilt Brand new computer New oxgyen sensor BEw temp gauge sensor and water temp sensor.


    This truck has idled funny ever since I bought it it had 125,000+ miles on it its got 145,000+now from my experience I know the tbi which was gms first try at fuel injection in the pickups wasn't the greatest my 1987 chevy silverado and my 89 gmc suburban never idled as bad as the 1995 does ithink 800 rpms is about the sitting still idle well if it sits and runs a few minutes it drops drastically the worst thing is the 87 was pieced together lol I'm curious as to what might be something I haven checked or I don't know about to be replaced thanks again you CHEVY FOR LIFE
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Oct 1, 2007, 01:27 PM
    . Check for codes.
    . Check for vacuum leaks.
    . Check EGR Valve.
    . Check/replace the coil--AutoZone will test for free.
    LOSTnNC's Avatar
    LOSTnNC Posts: 19, Reputation: 3
    New Member
    		  
    #3

    Oct 1, 2007, 01:35 PM
    No codes all new vacuum hoses Brand new egr valve and selonoid and coil isn't but a few months old go figure I love the truck I'm a chevy guy all the way thanks for the reply
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #4

    Oct 1, 2007, 05:31 PM
    Look into how to set the idle rpm. It may be similar to the link below. Regardless, it may give you some ideas.

    https://www.askmehelpdesk.com/cars-t...tml#post219948
    LOSTnNC's Avatar
    LOSTnNC Posts: 19, Reputation: 3
    New Member
    		  
    #5

    Oct 2, 2007, 06:23 PM
    Well I thought about that and I found out its sealed the idleSet screw on the tbi unit from the factory (The tbi units has been tampered with )so I'm thinking cuase the tbi unit has had this done I'm going to put a brand new gm tbi unit with new injectors on it but ill keep you up to date on it thanks for the info
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
    		  
    #6

    Oct 2, 2007, 08:05 PM
    You may need a thorough injector cleaning. I own a '95 Silverado and the only thing drivability I've needed to replace is the TPS due to a slight heitation/stumble, and the EGR due to a CEL: DTC 32. You can inspect the TB gasket: remove the air cleaner and hold the throttle fully open while looking down the throttle bore. If the throttlebody gasket is out of place you will see it protrude into the venturi. Replace as necessary.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #7

    Oct 3, 2007, 05:04 AM
    Take a small screwdriver and dig the seal out. Then, you can disconnect the IAC Valve and set idle speed to spec.
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