Logo
Click for Crusader parts and manuals!
Results 1 to 6 of 6
  1. #1
    Join Date
    Jun 2007
    Location
    THOROFARE , NJ , usa
    Posts
    4

    Default "I have a 98 Silverton 352 mot

    "I have a 98 Silverton 352 motor yacht with 454 tpi crusader's. when motors are started after a few minutes they will drop rpm's almost stall then pick up again run for a minute or so then repeat the same thing. So far I have cleaned the screws for the ign module, replaced fuel filters, replaced both IAC motors, cleaned oberg filters,disconnected the orange slave wire connecting the motors, and added new fuel and conditioner to both tanks. The condition does not happen above 1000 rpm's. The boat runs fine at cruising rpm's and even WOT. I also have a definate hesitation on the throttles when in idle and attemting to get the boat on plane. The hesitation only occurs for a second then the motors respond."

  2. #2
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    6,765

    Default "Hate to say it but sounds lik

    "Hate to say it but sounds like time to get a real scan tool hooked up to get some insight into what's really going on.....nobody's moved the distributors recently, have they?"

  3. #3
    Join Date
    Jun 2007
    Location
    THOROFARE , NJ , usa
    Posts
    4

    Default "Put scan tool on it no codes,

    "Put scan tool on it no codes, distributors not touched. Thinking now maybe a pressure regulator. When i first got the boat has problems with a dirty tank. Thinking regulator may be clogged."

  4. #4
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    6,765

    Default "scan tool - not a code reader

    "scan tool - not a code reader - so you can see what the sensor outputs are.

    Could be in the regulator as the ECM doesn't have any input from it. Fuel pressure gauges are cheap, just be careful hooking one up."

  5. #5
    Join Date
    Jun 2007
    Location
    THOROFARE , NJ , usa
    Posts
    4

    Default "Puy Rhinda scan tool on. No c

    "Puy Rhinda scan tool on. No codes from ECM. Checked fuel pressure on both motors was 35 lbs, Also changed fuel pressure regulator. No change"

  6. #6
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    6,765

    Default "So, what did the TP and MAP s

    "So, what did the TP and MAP sensor readings show?

    The MAP will work similar to a vacuum gauge and is useful in a similar manner. The TP tells the computer what it thinks you are doing with the throttle - if sticking or misaligned, it can generate idle instabilities/hesitations/etc."

Similar Threads

  1. 99 Johnson erratic idle and stalling
    By fredt in forum Johnson Evinrude Outboard Archive
    Replies: 5
    Last Post: 05-07-2009, 06:16 PM
  2. Erratic idle f150
    By reggie_keenan in forum Yamaha Outboard Archive
    Replies: 1
    Last Post: 07-19-2008, 12:54 AM
  3. Erratic idle on AQ225Ealso low vacuum
    By amxalan in forum Volvo Penta Gas Archive
    Replies: 1
    Last Post: 08-21-2006, 04:39 PM
  4. Low erratic Idle 1979 Johnson V4
    By raysirx in forum Outboard motors archive 2000-2004
    Replies: 1
    Last Post: 06-12-2001, 10:59 AM
  5. Bf45 erratic idle speed
    By JUSTINTIME in forum Honda Outboard Archive
    Replies: 0
    Last Post: 12-31-1969, 07:00 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •