INTERMITTANT "Missing" and rough running/idle - Page 2
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HT4100 4.1, 4.5, 4.9 Discussion, INTERMITTANT "Missing" and rough running/idle in Cadillac Engine Technical Discussion; well got the injectors swapped out... I was right only about an hour to 1.25 hours to finish up.... 1.5 ...
  1. #16
    JeremyG is offline Cadillac Owners Member
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    Re: INTERMITTANT "Missing" and rough running/idle

    well got the injectors swapped out... I was right only about an hour to 1.25 hours to finish up.... 1.5 to 1.75 hours total

    HOWEVER still no action in Cyls 3 and 4

    I made a new post... any experts or anyone want to give me some next-step suggestions? Let's move it over to the new thread here:
    http://www.cadillacforums.com/forums...ad.php?t=20733

  2. #17
    barth875oh is offline Cadillac Owners Member
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    Re: INTERMITTANT "Missing" and rough running/idle

    Quote Originally Posted by JeremyG
    well got the injectors swapped out... I was right only about an hour to 1.25 hours to finish up.... 1.5 to 1.75 hours total

    HOWEVER still no action in Cyls 3 and 4

    I made a new post... any experts or anyone want to give me some next-step suggestions? Let's move it over to the new thread here:
    http://www.cadillacforums.com/forums...ad.php?t=20733
    What all had to be removed when you swapped the injectors? How do you relieve the fuel pressure on the 4.9 engine? The reason I ask is I have a dead injector and am going to do this swap later on this week. Thanks.

  3. #18
    youbetcha77's Avatar
    youbetcha77 is offline Cadillac Owners Connoisseur
    Automobile(s): 93 Fleetwood RWD, 99 Deville
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    Re: INTERMITTANT "Missing" and rough running/idle

    When your cars had the dead cylinder from the injector failing what did the plug look like. I have a couple of cylinders dead on mine, but the plug has a fine film of black on it. The engine runs uneven. I have already replaced most of the ignition system. IM just wondering what it could be on my car. Another thing mine does thats weird is the fact I can pull my pcv valve out of the whole and the vaccum leak doesnt affect the car at all. It doesnt do one thing to it and its sucking like it is supposed to. Anyone know?

    Blaze

  4. #19
    HUF's Avatar
    HUF
    HUF is offline Cadillac Owners Connoisseur
    Automobile(s): 1995 FWB 100,*** miles CURRENT. 1991 Seville 175,000 SOLD
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    Re: INTERMITTANT "Missing" and rough running/idle

    Quote Originally Posted by JeremyG View Post
    2. Moved the PS pump off to the side, that required me to take off what I think is the tensioner pully from the serpentine belt so I could get to the big long bolt that held the back end of the PS pump on. I was a bit nervous pulling up and sideways on the PS pump since there's a hard line coming down out of the bottom but it didnt' break
    One does not need to remove the tensioner pulley. When you remove the serp. belt that pulley will move down and will open access to that long bolt you have described. I removed the pulley as well, then, after removal of the serp belt I realized it was not really necessary.

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