Recent content by SgtPreston

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    Holley Sniper over-revving

    Thanks for the reply - I think the problem is solved - I got a suggestion from one of the techs at HOTRODZ (they install several Snipers on street rods) to check the idle air control valve at the back of the throttle body. Removed it and sprayed with Brake-kleen and blew it out - there was...
  2. S

    Dome/Courtesy Lights

    Yes, fuse block is on the interior firewall by the parking brake - I didn't think about the cigarette lighter so that's something else to check tomorrow - thanks for all the help.
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    Dome/Courtesy Lights

    That's pretty close so I can check it out tomorrow - thanks.
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    Dome/Courtesy Lights

    Which switches are you referring to that provide the ground - headlight, door jamb, tailgate . . .? I thought the various lights were linked with a common ground wire run to the various switches. When the door was opened, the jamb switch closed the ground and the lights came on - correct?
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    Dome/Courtesy Lights

    Thanks, I'm not sure these apply as my 94 Yukon 2 dr. doesn't have an o/h console but I'll go through the other Adobe files you provided - it seems like I need the wiring diagram for the O/H lights and a cutaway view of the wiring location in the roof, possibly from a shop manual?
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    Dome/Courtesy Lights

    Thanks, I'll try that when I get back to the shop.
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    Dome/Courtesy Lights

    Tried both and also opened tailgate . Have checked bulbs also and have 12V but no ground - aren't all the courtesy lights on common ground? I'm trying to find the wire for the dome lights without tearing the headliner out.
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    Holley Sniper over-revving

    Installed a Blueprint 365 engine with a Holly Sniper EFI approx. 10K miles ago so it should be out of the "learning" mode. About a month ago it started revving infrequently instead of returning to normal idle - normal idle being 750-850 rpm. Come to a stop sign and it could be over-revving to...
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    Water in Passenger floorboard

    I posted the earlier problem with my '94 Yukon and went through all the suggestions. What I eventually did was remove the cowling sections between the windshield and hood - cleaned the area well with alcohol - masked off the windshield, hood, fenders and any area that might end up with aerosol...
  10. S

    Dome/Courtesy Lights

    The dome lights in my '94 Yukon worked at one time but quit some time ago - I think they are linked by a common ground wire but I can't find where the wire runs to see if there is a break. The under dash courtesy lights work fine. Any help would be appreciated.
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    New life in the '94 Yukon

    Okay, it's been sufficiently long enough since we replaced the small rubber hose connecting the fuel pump to the pickup and all things are still go - swapped out the break-in oil (500 mi.) and have about 200 more with no issues. EFI computer seems to be "learning" as it is supposed to - there...
  12. S

    Dome not working but courtesy lights are!

    Madgav, I am experiencing the same problem on my 1994 Yukon 2dr 4x4 and came across your request on the TY forum - did you ever find the problem (or a solution)? If so, would you please share - thanks in advance.
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    New life in the '94 Yukon

    Apparently it was the commercial name given to the aftermarket EFI manufactured by Holley.
  14. S

    New life in the '94 Yukon

    Well, time to eat a little crow - we dropped the tank to swap the 60 psi electric fuel pump for a 12 psi pump for the 4 BBL and found the little 4" long piece of tubing from the pump over to the pickup point had ruptured. It was supplied with the Holley pump for the ****** system and should...
  15. S

    New life in the '94 Yukon

    Okay, here's an update - The Holley Sniper is being replaced by an Edelbrock 1406 4BBL! I ended up being stranded twice and the second time was made worse by no-shows from AAA. I didn't do enough research on the Sniper before buying - it seems they have the ECU on the front of the unit and...
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