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  1. 90topdown

    Replaced TPS Sensor - still get .15 volts ???

    UPDATE C1 -Check vehicle battery power circuit- measure voltage between pin 37 and SIGRTN on self-test connector- Is voltage greater than 10.5 volts?? - NO 6.53 volts C2- Check VREF voltage between pin 26 and pin 46 - 4.89 volts Just for the heck of it, I pulled codes and got the...
  2. 90topdown

    Replaced TPS Sensor - still get .15 volts ???

    Ok, I will try those tests. I appreciate the help! What is a "breakout box"? I am using one of those standard digital volt/ohm meters.
  3. 90topdown

    Replaced TPS Sensor - still get .15 volts ???

    UPDATE DH5 CHECK VOLTAGE BETWEEN VREF AND SIG RTN CIRCUITS TO TP SENSOR Disconnect TP sensor. Key on, engine off. Measure voltage between VREF and SIG RTN circuits at the TP sensor harness connector. Is voltage between 4.0 and 6.0 volts? Yes, 4.9 volts DH6 CHECK TP CIRCUIT FOR...
  4. 90topdown

    tps problems

    With key on - engine off, what is the voltage between the green and black wires?? With key on - engine off, what is the voltage between the orange wire and ground? Have you checked for codes from the EEC?? What codes did you get??
  5. 90topdown

    Replaced TPS Sensor - still get .15 volts ???

    With KOEO and TPS sensor disconnected, voltage at connector between VREF-orange and SIGRTN- black is 4.9 volts. What is next step??
  6. 90topdown

    90 harness help?

    You have to get an 5.0 engine harness out of a 90 for it to be plug and play. As stated above, 90's are a unique year unto themselves.
  7. 90topdown

    Replaced TPS Sensor - still get .15 volts ???

    Update- Got a new TPS. Checked voltage on the green wire and got .14v :mad: So I guess it is not the TPS sensor. Just for giggles, I swapped in a known good C3W EEC. Got .14 volts again on the green wire of the TPS. So I guess that rules out the EEC. The only thing left is the...
  8. 90topdown

    Replaced TPS Sensor - still get .15 volts ???

    Ok , I pulled the TPS connector and ran a jumper wire between the orange and green posts. Then I pulled codes and got the following KOEO- 21,23,24 and 67 Using a dedicated ground wire from the DVM back to the neg batt post I got the following at the ECU, KOEO 4.93 volts on the dark...
  9. 90topdown

    Replaced TPS Sensor - still get .15 volts ???

    So if I do this ^ and get .7+ at idle and 4.5v+ at WOT------- The problem is in the EEC????? If I get lower voltage readings, the problem is in the wiring???
  10. 90topdown

    pulled codes need info

    Code 34- PFE or EVP circuit above the closed limit of 0.67 volts. Code 96- Fuel pump secondary circuit failure. The EEC did not sense battery voltage on the Fuel Pump Monitor circuit. What sort of problems are you having??
  11. 90topdown

    Replaced TPS Sensor - still get .15 volts ???

    Well, it looks like I have a problem here: 1. The TPS in question is a brand new FORD one. Not a cheap POS Vatozone special. 2. With Key On - Engine Off .15 volts between green and black on TPS 4.93 volts at orange wire With DVM between green and black and moving...
  12. 90topdown

    Replaced TPS Sensor - still get .15 volts ???

    Trying to adjust my TPS sensor as I read that it should be around .7 to .9 volts. Mine read .15 volts and I had a code 63 (low TPS voltage) so I replaced it with a brand new Ford TPS sensor and the new one reads .15 volts. :( Here is what I am getting: .15v between green and...
  13. 90topdown

    bye bye to the 347

    That sux!! What happened/ what were you doing when it went bye-bye??
  14. 90topdown

    base idle reset- low TPS voltage

    I was trying to do a base idle reset but my TPS voltage is way out of wack. Here is what I have: Engine warmed and up to operating temp and then shut off- TPS- .14 volts between green and black wire. TPS connector orange 4.74 volts black - .02 volts...
  15. 90topdown

    Please tell me this is not my heater core....

    Well, if you have done it over 6 times, know exactly what tools you need and have them right at hand, it is possible I guess. I know that it would be an all day project for me. TO the OP, BTW- If you are replacing the heater core-- spend the extra money and get a Ford one. You do not...
  16. 90topdown

    Please tell me this is not my heater core....

    :bs: I have a '90. How the heck are you doing it correctly in less than 2 hours on a car w/ A/C ??
  17. 90topdown

    A silent blanket of snow.

    Isn't there a good book by that name - "The Cobra in the Barn"???? BTW- I'd fix her up. You have all winter. It is in the barn after all. You will regret selling it. Trust me.
  18. 90topdown

    Need advice/tips

    As long as you have a place to do it and a basic set of tools, my advice is to tear it down your self. It really isn't that hard. If you don't need the car for a DD, I would make it a 2 weekend deal. Weekend 1- Tear down motor and remove heads. Since they are AL heads, I would take them to a...
  19. 90topdown

    90 mustang GT voltage/wiring troubles?

    I just went through a little wiring/voltage drop nightmare on my 90. It may not be your problm but mine turned out to be a ground problem. Make sure that all 4 ground wires are there and the connections are clean - engine block to firewall - motor mount to frame - battery to engine block...
  20. 90topdown

    few quick chassis to engine ground ?'s

    I would run a 4 ga wire from the engine block to the dash harness ground point near the starter solenoid. I also ran an 8 ga wire from that ground point direct to neg batt post as well as an 8 ga wire from the neg batt post to the front radiator support. The 2-8 ga wires might be...
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