Bringing TBI and Multi Port Fuel Injection to a New Level.     EFI Conversions and Tuning! Seattle to Portland! E-mail Tuning Consultant!
Page 2 of 2 FirstFirst 12
Results 16 to 22 of 22

Thread: Ram Jet 502 MEFI 4 Crank Position Sensor?

  1. #16
    Fuel Injected!
    Join Date
    Mar 2013
    Posts
    315
    These numbers are good for 96 also.

    The reluctor wheel used in 96-00 l29 is p/n 12561074.

    If these match and the sensor is good, only possible reason could be the space between wheel and sensor.

  2. #17
    Super Moderator dave w's Avatar
    Join Date
    Feb 2011
    Posts
    3,382
    Quote Originally Posted by kur4o View Post
    These numbers are good for 96 also.

    The reluctor wheel used in 96-00 l29 is p/n 12561074.

    If these match and the sensor is good, only possible reason could be the space between wheel and sensor.
    I measured almost 0.060" of gap between the CKP and trigger wheel. I'm thinking a gap of about 0.015" is where I need to be.

    dave w

  3. #18
    Super Moderator dave w's Avatar
    Join Date
    Feb 2011
    Posts
    3,382
    Quote Originally Posted by dave w View Post
    I measured almost 0.060" of gap between the CKP and trigger wheel. I'm thinking a gap of about 0.015" is where I need to be.

    dave w
    Correction, the gap is about 0.036".

  4. #19
    Super Moderator dave w's Avatar
    Join Date
    Feb 2011
    Posts
    3,382
    Does anyone know what the output voltage of the Vortec 454 crank position sensor is supposed to be? I have two used crank position sensors (not sure what make / model / year they are from) and the output voltage is 5.25 volts DC. I just purchased a new Standard Motor Products (PC123T) Vortec 454 crank position sensor and it has an output voltage of 12 volts DC. When the trigger wheel passes the crank position sensors I have the output voltage goes to 0 (ZERO) volts DC.

  5. #20
    Fuel Injected!
    Join Date
    Mar 2013
    Posts
    315
    I did some research and the 454 sensor output a frequency to pcm, and for diagnostics some duty cycle in hz is measured.
    It gets some B+ voltage so it is possible the output be around 12v.
    For comparison Ls crank sensor output 4-6v signal.

    Could a 96-97 lt1 crank sensor be used in the ramjet engine.

  6. #21
    Super Moderator dave w's Avatar
    Join Date
    Feb 2011
    Posts
    3,382
    Quote Originally Posted by kur4o View Post
    I did some research and the 454 sensor output a frequency to pcm, and for diagnostics some duty cycle in hz is measured.
    It gets some B+ voltage so it is possible the output be around 12v.
    For comparison Ls crank sensor output 4-6v signal.

    Could a 96-97 lt1 crank sensor be used in the ramjet engine.
    The 502 started today, after installing the Standard Motor Products PC123T crank position sensor. More work to follow.

    dave w

  7. #22
    Fuel Injected!
    Join Date
    Jan 2013
    Posts
    234
    Glad she fired, here is the actual marine part number for future reference

    $94
    8M0011986 SENSOR ASSEMBLY, Cam Position


    These CKP sensors are very sensitive to install, I have found that if I install the sensor then use the screw to draw the sensor in they don't work, but if I insert the sensor, then give it a push to ensure its in there flush, THEN tighten the screw it'll start.

    peace
    Hog

Similar Threads

  1. slot mount engine position sensor
    By trades707 in forum Other EFI systems and related topics
    Replies: 0
    Last Post: 05-31-2015, 09:19 PM
  2. crankshaft position sensor.
    By ericjon262 in forum Gear Heads
    Replies: 4
    Last Post: 02-12-2015, 09:49 AM
  3. 22re Crank and Cam Sensor Locations.
    By dfarr67 in forum Other EFI systems and related topics
    Replies: 0
    Last Post: 09-12-2014, 08:25 AM
  4. direct crank position input
    By ericjon262 in forum GM EFI Systems
    Replies: 0
    Last Post: 02-02-2014, 10:22 AM
  5. Throttle Position Sensor
    By POZE in forum GM EFI Systems
    Replies: 3
    Last Post: 04-10-2013, 04:54 AM

Bookmarks

Posting Permissions

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