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Even THIRD AMM no better than NO AMM? 200 1992

posted by Gregg Shadduck on Fri Jan 1 08:58 CST 2010
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last visit: Fri Mar 7 12:10 CST 2014

[RELATED]

It is so cold here that I am begging for guidance. I would tear my hair out, but there is so little left, and I need it for the cold...

Our 1992 245, with 237k miles (an impulsive eBay purchase, which in the last 5k miles has gotten NEW oxygen sensor, ECT sensor, crank posn sensor, fuel pressure regulator and main fuel pump and check valve, main relay and 951 ECU... got the picture?)...

1. Starts fine in the cold, when cold, and drives away fine. OK!

2. BUT when it has been driven (= is WARM), and turned off,
and then sits for even 5 minutes (or longer...):
a. It starts fine
b. and works well for about 3-5 seconds
c. --> THEN Loses power for 15-25 seconds :-(
d. but then drives fine!

The loss of power is profound: the car can hardly get out of its own way, when driven on the street. And if left to idle, it becomes very lumpy/rough/uneven... until the 15-25 seconds has passed, and then in 2 winks of an eye all is well!

I checked for leaks in the intake tubing, etc. Haven't yet found any.
I did some other sensible stuff, which I have already forgotten. :-(
Replaced the AMM with one I thought was good: no change.
Dinked around...

N.B.: Disconnected the AMM, and ALL WAS FINE! Progress!

I replaced the 2nd AMM with a THIRD AMM, at dark last night, and the still-warm car started and idled OK.

TODAY it is back to the ugly scenario above. :-(

I am having trouble thinking about this straight.
And easy things that involve a DVM are slow and painful in the cold.
I've got Bentley's and a warm couch...

Thank you for help and direction! (I want a heated garage in the New Year!)

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MESSAGES IN THIS THREAD

Even THIRD AMM no better than NO AMM? [200][1992]
posted by Gregg Shadduck subscriber on Fri Jan 1 08:58 CST 2010 >

Even THIRD AMM no better than NO AMM? [200][1992]
posted by pageda on Fri Jan 1 09:12 CST 2010 > V
- Freshening electrics is smart [200][1992]
  posted by Gregg Shadduck subscriber on Fri Jan 1 11:14 CST 2010 > V
  - Freshening electrics is smart [200][1992]
    posted by pageda on Fri Jan 1 11:28 CST 2010 > V
    - Freshening electrics is smart [200][1992]
      posted by Gregg Shadduck subscriber on Fri Jan 1 12:01 CST 2010 > V
      - Freshening electrics is smart [200][1992]
        posted by jon_h on Sat Jan 2 07:56 CST 2010 > V
        
        240 fuses: Apogee or perigee... or citronella, for all I know [200][1992]
        posted by Gregg Shadduck subscriber on Sat Jan 2 08:11 CST 2010 > V
        
        240 fuses: Apogee or perigee... or citronella, for all I know [200][1992]
        posted by jon_h on Sat Jan 2 09:37 CST 2010 > V

Even THIRD AMM no better than NO AMM? [200][1992]
posted by lucid subscriber on Fri Jan 1 09:31 CST 2010 > V
- Check valve and what HOT is for restart [200][1992]
  posted by Gregg Shadduck subscriber on Fri Jan 1 11:43 CST 2010 > V
  - Check valve and what HOT is for restart [200][1992]
    posted by david hunter on Fri Jan 1 16:56 CST 2010 > V
    - Check valve and what HOT is for restart [200][1992]
      posted by pageda on Fri Jan 1 23:40 CST 2010 > V
      - Check valve and what HOT is for restart [200][1992]
        posted by david hunter on Sat Jan 2 02:58 CST 2010 > V
        
        Check valve and what HOT is for restart [200][1992]
        posted by pageda on Sat Jan 2 03:05 CST 2010 > V
        
        Check valve and what HOT is for restart [200][1992]
        posted by jon_h on Sat Jan 2 04:42 CST 2010 > V
        
        Maybe time to look at spark plugs [200][1992]
        posted by Gregg Shadduck subscriber on Sat Jan 2 08:01 CST 2010 > V
        
        Maybe time to look at spark plugs [200][1992]
        posted by pageda on Sat Jan 2 08:16 CST 2010 > V
    - Check valve and what HOT is for restart [200][1992]
      posted by Gregg Shadduck subscriber on Sat Jan 2 07:57 CST 2010 > V

Even THIRD AMM no better than NO AMM? [200][1992]
posted by kourt99 subscriber on Fri Jan 1 12:25 CST 2010 > V

Even THIRD AMM no better than NO AMM? [200][1992]
posted by jon_h on Fri Jan 1 13:58 CST 2010 > V
- Even THIRD AMM no better than NO AMM? [200][1992]
  posted by ronald subscriber on Fri Jan 1 14:55 CST 2010 > V
  - Confident in work and parts? [200][1992]
    posted by Gregg Shadduck subscriber on Sat Jan 2 07:51 CST 2010 > V
- Is AMM or NO AMM operation repeatable? Yes. [200][1992]
  posted by Gregg Shadduck subscriber on Sat Jan 2 08:20 CST 2010 > V

Easy way to make fuel pressure gauge adaper [200][1992]
posted by ibs740 on Fri Jan 1 14:44 CST 2010 > V
- Easy way to make fuel pressure gauge adaper [200][1992]
  posted by Gregg Shadduck subscriber on Sat Jan 2 07:45 CST 2010 > V

Even THIRD AMM no better than NO AMM? [200][1992]
posted by J.R. on Fri Jan 1 14:49 CST 2010 > V
- Even THIRD AMM no better than NO AMM? [200][1992]
  posted by Gregg Shadduck subscriber on Sat Jan 2 07:40 CST 2010 > V

latecomer advises waiting for Spring? [200][1992]
posted by Art Benstein subscriber on Sat Jan 2 01:35 CST 2010 > V
- Wait for Spring? Amen. But long wait. The Doors: Waiting for the Sun. [200][1992]
  posted by Gregg Shadduck subscriber on Sat Jan 2 12:00 CST 2010 > V
  - Wait for Spring? Amen. But long wait. The Doors: Waiting for the Sun. [200][1992]
    posted by Art Benstein subscriber on Mon Jan 4 04:37 CST 2010 > V
    - Harbor Freight fuel pressure tester aground at harbor mouth [200][1992]
      posted by Gregg Shadduck subscriber on Thu Jan 7 02:05 CST 2010 > V
      - Harbor Freight fuel pressure tester aground at harbor mouth [200][1992]
        posted by Art Benstein subscriber on Thu Jan 7 08:27 CST 2010 > V
        
        Harbor Freight fuel pressure tester aground at harbor mouth [200][1992]
        posted by Gregg Shadduck subscriber on Sun Feb 7 04:50 CST 2010 > V
- latecomer advises waiting for Spring? [200][1992]
  posted by Oleseahorse subscriber on Sat Jan 2 14:40 CST 2010 > V

AMM as starting point, then use senses [200][1992]
posted by Gregg Shadduck subscriber on Sat Jan 2 12:20 CST 2010 > V

Timing belt off a tooth -- ran better without AMM, it seems? [200][1992]
posted by Gregg Shadduck subscriber on Fri Feb 26 03:55 CST 2010 > V
- Timing belt off a tooth -- ran better without AMM, it seems? [200][1992]
  posted by Art Benstein subscriber on Fri Feb 26 04:40 CST 2010 > V
  - Timing belt off a tooth -- ran better without AMM, it seems? [200][1992]
    posted by Gregg Shadduck subscriber on Mon Mar 15 09:59 CST 2010 > V
    - presbyopia and piles of used v-belts [200][1992]
      posted by Art Benstein subscriber on Mon Mar 15 10:36 CST 2010 > V

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Even THIRD AMM no better than NO AMM? 200 1992