BodybyFisher

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Everything posted by BodybyFisher

  1. BodybyFisher

    Mailbag: fewest words category

    If you were on a Cadillac FB group, all of the members would immediately parrot: Head Gasket Because it's cool to press the panic button and to ignore actual diagnostics.
  2. Keep in mind that we just left the summer temperatures. High temps cause higher system pressures. Some leaks only happen when the system pressure reaches a specific pressure, say for example 14 psi, if the system doesnt reach 14 psi, there will be no coolant leak. Leak points to be examined are: Radiator end tanks, look for white residue where the tanks attach and for cracking The radiator itself, where the horrizonal tubes attach to the side tanks Crossover seals Waterpump seal and body o-ring Tank may be cracked Radiator cap releasing lower than rated pressure Hose clamps Coolant pipes at back of engine Thermostat seal and cover leaks Remember if you smell coolant that is a pressure leak. Coolant under pressure vaporizes when it hits atmospheric pressure, you won't see a leak you will smell a leak
  3. Wow I just read the complaints and I hope this works out
  4. The cooling supplement tablets do a terrific job of stopping nuisance leaks, I have found the tablet material caked around the crossover seals. Here is a photo of tablet material coagulation. You may have slowed the leak with it. Here is also a photo of damaged seals, these seals about 45K miles on them
  5. Try removing and replacing the ECM plugs to reset them. The I034 indicates an ECM problem. With the engine idling do a 'tap test', tap on the ECM/PCM if the engine stumbles it indicates a bad pcm Did you reinstall the ISC motor? See this thread, if resetting the ECM connector doesnt work you may need to replace the ECM
  6. It is probably bad shift solenoids. I am not sure if you will get a code for them on obd1. Try disconnecting the battery to reboot the system and see if you still get this
  7. If you have brake, traction and abs messages, you have codes. Check the codes and post ALL codes here. Nothing vague, post specifics and whether its history or current. Video tape the codes on your phone to make it easy
  8. If there is a speaker grill or vent look for screws in there
  9. Use the onboard diagnostic system to retrieve the trouble codes and post them here look in the signature of my post here to find out how to retrieve the codes
  10. BodybyFisher

    TPS and ICM Question

    These wires have me concerned. Let's check the IAC wires for continuity, short to ground and short to power. Pull the connector off, the plug should be marked A, B, C & D, if not use the colors from the schematic below. Using your ohm meter check the continuity back to the PCM plug C1 again, pins 8, 9, 10 & 11 respectively. Check the pins on both ends for corrosion. If we can get you into the diagnostic data we may be able to see what is going on. We can not test voltages here, this is PWM, but we can test to make sure the wires are intact from the PCM to the IAC If there is a crack in the intake where you can't get to it you won't find it. I still think you will need to remove the intake at some point.
  11. The failure you are having stalling and starting right back up is a symptom of a bad crank position sensor so that is definately your problem. If you only want to replace one sensor, I am not sure if we can tell which one it is that is acting up. Check wiring and connectors, it's odd that it happens on turns
  12. There is your answer sir!! Crankshaft position sensor.....( @Jan Olsson nailed this above) I would replace them both, but be very careful to keep the connectors where they belong, top on top and bottom on bottom. Also, you said it.happened on turns, be sure the wires are not hitting up against the exhaust manifold and hit when you turn it is close in there. Make sure the wires are.retained to stay away from the exhaust manifold
  13. BodybyFisher

    TPS and ICM Question

    What do you all think of this idea. My friend has a 98, what if I hook up my Tech 2 to his system, and navigate to the IAC command data and find the name of the identifier that way? @Logan What do you think about that? I would get the identifiers for the IAC, fuel trims Long and Short term, throttle percentage, throttle position switch data, etc.
  14. BodybyFisher

    TPS and ICM Question

    I am not sure about what happened after 1996, but the 96 diagnostics system was VERY much like my 91 OBD1. On my 96 and my 91, you were able to go into the diagnostics system and read the system data, much like the TECH 1 and TECH 2 do. You 'see' the same data. I have monitored fuel trims, O2 sensor data, etc. I am pretty sure, that we can get your IAC count from the system much like a TECH2 would. If we can do that, @Logan noted above that IF the system is commanding the IAC to be closed or ZERO, you definitely have a lean condition. (correct me if I understand this wrong Logan). The problem is this..... I do not know the identifier of the IAC command data, to find it the data we need. All you would need to do it get into the DATA subdirectory and go to the IAC data identifier. Logan, do you have any info to identify the IAC command data info in the PCM? There must be a list someplace like there was with the OBD1 system. Sometimes in the FSM, they will clearly identify the location for you to access with the TECH2 and that is the location you need to navigate to manually through the DIC. I need to go through the FSM closer to see if I can find the location identifier for the IAC. I would also like to see your short and long term fuel trim data, that would show rich and lean conditions
  15. BodybyFisher

    TPS and ICM Question

    Nah, you will be fine. We will help. I hear you about the temps, my 6'6" 38 yo son is in Boca and complained about the heat to me just yesterday.
  16. BodybyFisher

    1996 NORTHSTAR ENGINE REPLACEMENT

    Where did you find a shift kit for the 4T80E?
  17. Have you checked for codes? Post all P codes here. P codes will help direct us. I see JAN asked about them but don't see a reply from you. 2002, did have CAT problems but that wouldn't have gone away in the warm weather Have you checked FUEL PRESSURE with a gage? I would test for fuel pressure immediately, if you can get a gage with a long hose, tape the gage to the windshield and see what happens when it stalls, and when you turn left Please post all P codes.
  18. BodybyFisher

    TPS and ICM Question

    I am less concerned with that, then I am about the 4 bolts connecting the spacer to the intake, and the oring. If we assume that the smoke test was legitimate, do you have the video, can you post it? I know you are doing a lot of work, it may make sense to pull the intake altogether with the TB installed, throw it on a table and inspect and work on it there, replace the oring, intake seals, look for cracks, etc. Let me know, Ill write a procedure and pull the procedure from the FSM
  19. BodybyFisher

    TPS and ICM Question

    @jndnaps you said above you didnt torque the bolts down, I assume you mean the throttle body bolts? I am speaking about the 4 bolts attaching the spacer to the intake, where the oring is located. Does that make sense?
  20. To eliminate the battery, first have it load tested to be sure it's good. Check glove compartment and trunk lights
  21. BodybyFisher

    Cadillac Allante

    Here is a 91 Allante code list and directions as to how to retrieve them. I dont see anything regarding the cooling fans.. I have a 91 Seville 4.9 Factory Service Manual, I'll look it over maybe it will be helpful. https://www.troublecodes.net/cadillac/91-92-allante-4-5l-vin-8/
  22. BodybyFisher

    TPS and ICM Question

    @Logan I believe the 96 has the ability to display, real time parameters, does that sound right, I think I could do it on my 96
  23. BodybyFisher

    TPS and ICM Question

    This may be possible (commanded IAC) through the dash with the real time read outs I'll look into the commands