Search results

  1. JDGMC

    OBD1 /winaldl connection issues.

  2. JDGMC

    OBD1 /winaldl connection issues.

    Most of the time it's a system issue, but windows doesn't make it easy to find the root cause. A couple of things you should do to rule out connection issues related to the computer/conflicts if you haven’t already: 1. Confirm the device (cable) is connected (not just assigned a...
  3. JDGMC

    Where to find new 3 switch 88-94 Gauge Bezels?

    88-94
  4. JDGMC

    88-98 Service Manuals

    Updated - 1988-2000 GMT400 CK Light Truck Service, Unit Repair, Overhaul, Wiring Manuals ETC. 1987 1987 GM RV Light Truck Wiring Manual with early release 1988 CK wiring diagrams 1988 1988_GMT400_CK_Light_Duty_Truck_Service_Manual ** NEW 5/2016...
  5. JDGMC

    Constant knock sensor

    Is the break flush with the block, or is part of the stud still visible? Post a picture. If you have something to hold onto, start with vice grips and apply heat around the stud. Otherwise, if you’re using an extractor bit, make sure to keep your ratchet or wrench at a right angle when applying...
  6. JDGMC

    Constant knock sensor

    It's not just how eager everyone is to help—it’s the depth of experience-based knowledge shared here, not just books (like me). Even the most seasoned experts might occasionally slip up, but it’s impressive that they rely on their memory rather than spending hours verifying every detail with...
  7. JDGMC

    Constant knock sensor

    I know - I was joking about the color thing with parts.
  8. JDGMC

    Constant knock sensor

    Looks a little too pink for me..
  9. JDGMC

    Constant knock sensor

    Piezoelectric material is definitely one of nature's magical stones. The piezoelectric effect is essentially nature’s way of converting mechanical pressure into electricity—and vice versa. Technically the piezoelectric effect is a phenomenon where certain materials generate an electric charge in...
  10. JDGMC

    Constant knock sensor

    That would be very entertaining. Likely more advantages for those with an ear for engine noise. I believe the challenges with a torque procedure in tight spots for various engines/accessories may be the root cause for many parts that get over-torque. My guess is most diy types do not own a...
  11. JDGMC

    Constant knock sensor

    Yes they are unique - 1 year thing. They are indeed part of the P4 family and yes removable memcals with 8192 baud - not 160. I’m no expert, but I do have one in my 91 truck.
  12. JDGMC

    Constant knock sensor

    For these older trucks, the knock sensors on high-mileage stock vehicles often add little value due to the excessive noise from worn components. Moreover, modifications tend to render the original setup ineffective because many DIY enthusiasts overlook the importance of the knock sensor (kS)...
  13. JDGMC

    Constant knock sensor

    Careful with the counterfeit parts.
  14. JDGMC

    Constant knock sensor

    If you haven't already - Verify the com port assigned to the usb device matches what you have in the Tuner RT preferences then confirm that it's "in use". Just in case you haven't or don't know how to - see below. Click on the device, select "port settings" then "advanced" at the bottom. You...
  15. JDGMC

    Constant knock sensor

    Have you physically checked the com port assigned to the USB device on your computer? Device manager
  16. JDGMC

    Constant knock sensor

    So a ‘91 V8 w/4L80E didn’t run a P4?
  17. JDGMC

    Constant knock sensor

    Have you watched any videos on setting up preferences with your cable? This video might help Set up OBD1 GM ALDL USB Cable - WIN10 and TunerPro RT and Data Logging Files
  18. JDGMC

    Constant knock sensor

    The after markets will work too. Just need to make sure they give you the right one - you take along your DVM to parts store and probe it right there on the counter.
  19. JDGMC

    Constant knock sensor

    Yeah - it can quite frustrating when the parts stores are selling the wrong part and don't even know it. I put it on the manufacturers for this mess. I honestly can't blame a mechanic/shop either - he or she is just ordering the parts based on vin/model/year etc.
  20. JDGMC

    Constant knock sensor

    Not out of the woods yet. You may encounter some other wiring issues after this. Tidy up that harness the best you can before you put it back together. Progress - You're getting there.
  21. JDGMC

    Constant knock sensor

    Hmm. Can you check to make sure the red connector contains the wires colors and sequence in the connector table?
  22. JDGMC

    Constant knock sensor

    OK. You should have a black tip with your truck. I'm wondering if the previous owner(s) were haunted by the same code and never checked the knock sensor with the assumption that it was new-followed by the wiring friendzy and ultimately pulled the bulb? Did you get to the 2nd step after the 5V...
  23. JDGMC

    Constant knock sensor

  24. JDGMC

    Constant knock sensor

    I believe it ultimately depends on whether the vehicle has a PCM or an ECM, so by year and trans. In this case, the OP has a PCM because of the Trans-E. A 700R4 should have an ECM with an external knock filter (ESC). The resistance of the knock sensor (KS) should differ between a system with an...
  25. JDGMC

    Constant knock sensor

    I would be surprised if that’s the case. Although I have seen the wrong pictures and even descriptions listing the KS for both Auto and Man trans regarding GMT400s-I don’t believe that’s possible. I guess you have would have a 50/50 chance of it working.

Latest posts

Staff online

Members online

... and 7 more.
Total: 1,137 (members: 57, guests: 1,080)

Forum statistics

Threads
70,226
Messages
1,496,543
Members
64,283
Latest member
mdanley

Share this page

Top