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  1. #1

    Default '96 suburban "hesitation" issue

    Hope everyone had a Merry Christmas!
    I've got a 1996 suburban and have recently noticed a cough or hesitation. It will usually fire up immediately when you turn the key, but I've begun to notice that about 1 time in 20 starts, it will cough when starting, or start a little rough. Then yesterday, I was doing 70mph on the freeway and was going up a decent incline when I felt just a little hesitation. Felt like just a couple of blips, or coughs, and then it quit and was fine.

    It's got 100k miles and I've recently done a tune up (plugs, wires, cap, rotor). I'm thinking fuel filter? Any other thoughts?

    Thanks!

  2. #2
    Legend

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    Check your cap it is just plastic it's possible you over tightened the screws and are now stripped and the cap is loose. What kind of olugs did you put in? The OEM are the best for the vortecs, proven fact that they will not run as well on other brands. Considering the age and only 100k on the clock it either sits a lot or has a lot of town only miles so the fuel filter could very well be a possibility as your gas would sit a lot, possibly getting condensation in it.
    99 K1500 Suburban LT "THE BEAST"
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  3. #3
    Sr. Engineer Dana W's Avatar
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    Dec 2011
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    Dirty throttle position sensor, and/or dirty throttle body, and/or low fuel pressure, and/or operator error during the tune up.

  4. #4

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    Used delco parts in the tune up (iridium plugs #41-993). Done many a tune up so I like to think I can rule out operator error!

    It gets driven about 5 miles/day during the week, so condensation is a definite possibility. How does one go about cleaning the throttle position sensor?

  5. #5
    Sr. Engineer Dana W's Avatar
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    Quote Originally Posted by estrom View Post
    Used delco parts in the tune up (iridium plugs #41-993). Done many a tune up so I like to think I can rule out operator error!
    Nuthin' personal dude
    .

    It gets driven about 5 miles/day during the week, so condensation is a definite possibility. How does one go about cleaning the throttle position sensor?
    That is a possibility, the inside of your distributor may never get really dry in winter. The throttle position sensor is more prone to being out of position than dirty. I don't know what the specs are but there is an air gap that has to be real close. Dirt can get it all messed up too. Come to think of it, if this is the case you should be seeing a CEL. It is probably something other than the T Pos.

  6. #6

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    "Nuthin' personal dude"...No worries.

    I was just going to ask about the CEL since mine isn't coming on.

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