The trionic code P1020 is a valid code,as David Ingram says above.It's a all-embracing diagnostic trouble code for the throttle position sensor operation.The LH problem you are having has got to be vacume hose related,to the throttle position function,not working and being in limp home mode.Could you have the Vacume check valve in the vacume line in backwards;from the intake manifold,passenger side,to the safety valve mounted on the false bulk head????

My mistake indeed the ETS code 78390 is valid,it's not listed in DTCs code list(that i looked at first),but does have it's own diagnostic trouble shooting tree procedure on page 91 in manual #360461,2:5 Traction Information Manual MY 91-95.It all relates to checking the Safety valve,the vacume check valve,the vacume lines,and the electrical connector in the systems.

Do you think that one of the new lines is/could be bad,could you check them??? It really has to be a problem in one line not suppling vacume!!! It some thing really simple,you just got to just find it.

posted by 64.136.27...

• TCS Throttle Body probs on '95 Aero, replaced vac, EricG, Tue, 17 May 2005 00:57:58
  • Fixed!!!!!! Story above! n/m, EricG, Wed, 18 May 2005 16:57:36
    • Can't find it above???? N/M, Ron J, Wed, 18 May 2005 18:13:54
  • 'Hard' vs Soft code, EricG, Tue, 17 May 2005 12:30:17
    • Permanent vs. intermittent, David Ingram, Wed, 18 May 2005 07:11:39
  • Remember, the vacuum line diagram on the fender, RayV, Tue, 17 May 2005 09:02:04
    • Thanks! I did not even realize the diagram was on the, EricG, Tue, 17 May 2005 12:18:19
  • Need more info., Ron J, Tue, 17 May 2005 08:47:25
    • 78390 is ETS code, and valid in my book., EricG, Tue, 17 May 2005 10:53:09
      • Re: 78390 is ETS code, and valid in my book., Ron J, Wed, 18 May 2005 08:15:35 <-- Viewing This Message
        • It's too simple or I am! Really think needs recal., EricG, Wed, 18 May 2005 10:29:03
          • Something Simple to check........., Ron J, Wed, 18 May 2005 15:32:32
            • Want to make EASY CASH???????, Red, Sun, 31 Jul 2005 21:10:39
  • It may be time for a TB. I was able to get a great, Winder, Tue, 17 May 2005 08:19:23
  • Re: TCS Throttle Body probs on '95 Aero, replaced vac, David Ingram, Tue, 17 May 2005 06:04:07
    • Sorry....misread your post...., David Ingram, Tue, 17 May 2005 06:05:40
      • BUT... DO Make Sure the Valve Is Oriented Correctly..., Peter Ingram, Tue, 17 May 2005 15:25:32
        • Valve's right. Wish I had a techII...N/m, EricG, Tue, 17 May 2005 18:06:50
  • Re: TCS Throttle Body probs on '95 Aero, replaced vac, tiziano, Tue, 17 May 2005 04:13:42
    • Thought about the silicone lines, but they're thick!, EricG, Tue, 17 May 2005 07:38:37
      • Different types of silicone hoses, Bill Homer , Tue, 17 May 2005 08:42:02
        • Re: Different types of silicone hoses, tiziano, Wed, 18 May 2005 00:54:33

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