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Bad ECU? the infamous pink label 561 200

posted by someone claiming to be macs70GLT on Tue May 29 08:17 CST 2018 [RELATED]

Ok - I'm working on my (new to me 89' Volvo 240, LH 2.4)

I have done a lot of general maintenance items, see list below.

In the last week or so it has developed an extremely rough idle, to the point it is very difficult to drive. Currently throwing code 2-2-4 (ECT sensor), however it’s a new sensor, and the ECU appears to be showing correct resistance per temp graph in Bentley.

The things I have not yet done: test the cold start injector, check brake booster for vacuum leak

Is there a way to check the ECU itself??

I'm interested in looking for a 951 ECU, from what I've read it does not require the cold start injector - one of the prime suspects...

Recent work:
Replaced in-tank fuel pump
Replaced fuel filter & check valve, also checked operation of pump
Removed & cleaned injectors – new o-rings, pintle caps & filter baskets
Spark plugs, cap & rotor, plug wires
Air filter
Cleaned out the flame trap, removed separator & installed with new o-ring
New Oxygen sensor
New engine coolant temp sensor
Swapped in different IAC valve
Swapped in different AMM
Swapped in different fuel pressure regulator
Cleaned throttle body

Thanks for your inputs, definitely appreciated.

Mike
88' 240, sold @ 250K miles
98' 70GLT, sold at 225K miles
95' 940T, limping along in NM (son's car)
98' V70GLT - my mistake, sold at a loss...
89' 240 - just getting acquainted

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Bad ECU? the infamous pink label 561 [200]
posted by someone claiming to be macs70GLT on Tue May 29 08:17 CST 2018 >

ECU is a suspect? [200][1989]
posted by Art Benstein subscriber on Tue May 29 08:59 CST 2018 > V
- ECU is a suspect? [200][1989]
  posted by someone claiming to be macs70GLT on Tue May 29 13:20 CST 2018 > V
  - ECU is a suspect? [200][1989]
    posted by pageda on Tue May 29 14:11 CST 2018 > V
    - ECU is a suspect? [200][1989]
      posted by someone claiming to be macs70GLT on Wed May 30 13:15 CST 2018 > V
  - ECU is a suspect? [200][1989]
    posted by Art Benstein subscriber on Tue May 29 14:22 CST 2018 > V
    - ECU is a suspect? [200][1989]
      posted by someone claiming to be macs70GLT on Tue May 29 23:23 CST 2018 > V
      - ECU is a suspect? [200][1989]
        posted by Art Benstein subscriber on Wed May 30 05:22 CST 2018 > V
        
        ECU is a suspect? [200][1989]
        posted by someone claiming to be macs70GLT on Wed May 30 08:28 CST 2018 > V
        
        ECU is a suspect? [200][1989]
        posted by someone claiming to be macs70GLT on Wed May 30 23:07 CST 2018 > V
        
        ECU is a suspect? [200][1989]
        posted by Art Benstein subscriber on Thu May 31 12:04 CST 2018 > V
        
        ECU is a suspect? [200][1989]
        posted by someone claiming to be macs70GLT on Thu May 31 12:42 CST 2018 > V
        
        ECU is a suspect? [200][1989]
        posted by pageda on Thu May 31 13:48 CST 2018 > V
        
        ECU is a suspect? [200][1989]
        posted by Art Benstein subscriber on Thu May 31 14:14 CST 2018 > V
        
        ECU is a suspect? [200][1989]
        posted by someone claiming to be macs70GLT on Thu May 31 22:14 CST 2018 > V
        
        ECU is a suspect? [200][1989]
        posted by someone claiming to be macs70GLT on Tue Jun 5 09:01 CST 2018 > V
        
        ECU is a suspect? [200][1989]
        posted by pageda on Tue Jun 5 12:19 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by Art Benstein subscriber on Tue Jun 5 13:06 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by someone claiming to be macs70GLT on Tue Jun 5 15:09 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by Art Benstein subscriber on Tue Jun 5 18:44 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by someone claiming to be macs70GLT on Sat Jun 9 16:05 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by pageda on Sat Jun 9 17:14 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by someone claiming to be CB on Sat Jun 9 17:38 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by machine man subscriber on Sat Jun 9 18:15 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by Art Benstein subscriber on Sun Jun 10 10:51 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by someone claiming to be CB on Sun Jun 10 11:13 CST 2018 > V
        
        Zebra Hoof Beats [200][1989]
        posted by Art Benstein subscriber on Sun Jun 10 15:14 CST 2018 > V
        
        Zebra Hoof Beats [200][1989]
        posted by someone claiming to be CB on Sun Jun 10 20:39 CST 2018 > V
        
        Zebra Hoof Beats [200][1989]
        posted by Art Benstein subscriber on Mon Jun 11 04:55 CST 2018 > V
        
        Zebra Hoof Beats [200][1989]
        posted by Oleseahorse subscriber on Mon Jun 11 06:26 CST 2018 > V
        
        Zebra Hoof Beats [200][1989]
        posted by someone claiming to be CB on Tue Jun 12 22:15 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by machine man subscriber on Mon Jun 11 11:09 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by someone claiming to be macs70GLT on Sun Jun 10 22:24 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by machine man subscriber on Mon Jun 11 10:49 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by someone claiming to be macs70GLT on Mon Jun 11 13:47 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by someone claiming to be macs70GLT on Thu Jun 14 08:16 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by machine man subscriber on Thu Jun 14 09:08 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by someone claiming to be macs70GLT on Thu Jun 14 14:48 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by Art Benstein subscriber on Thu Jun 14 09:12 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by someone claiming to be macs70GLT on Thu Jun 14 15:12 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by Art Benstein subscriber on Thu Jun 14 18:23 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by someone claiming to be macs70GLT on Sat Jun 16 13:35 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by pageda on Sat Jun 16 13:39 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by someone claiming to be macs70GLT on Sat Jun 16 14:32 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by machine man subscriber on Sat Jun 16 15:00 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by pageda on Sat Jun 16 15:32 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by jwalker on Sun Jun 17 08:07 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by someone claiming to be macs70GLT on Fri Jun 22 13:09 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by pageda on Fri Jun 22 13:36 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by someone claiming to be macs70GLT on Fri Jun 22 13:29 CST 2018 > V
        
        ECU and Intake Manifold Gasket didn't quite fix it [200][1989]
        posted by pageda on Sat Jun 23 04:09 CST 2018 > V
        
        Any vacuum leak from brake booster? [200][1989]
        posted by Amarin on Sat Jun 23 04:51 CST 2018 > V
        
        ECU is a suspect? [200][1989]
        posted by someone claiming to be macs70GLT on Sun Jun 3 00:38 CST 2018 > V
  - ECU is a suspect? [200][1989]
    posted by someone claiming to be CB on Tue May 29 16:14 CST 2018 > V

Bad ECU? the infamous pink label 561 [200]
posted by 1pocket on Tue May 29 13:10 CST 2018 > V

Bad ECU? the infamous pink label 561 [200]
posted by someone claiming to be macs70GLT on Mon Jun 25 09:01 CST 2018 > V
- Bad ECU? the infamous pink label 561 [200]
  posted by pageda on Mon Jun 25 12:00 CST 2018 > V
  - Bad ECU? the infamous pink label 561 [200]
    posted by someone claiming to be macs70GLT on Mon Jun 25 22:28 CST 2018 > V
    - Education and Tools [200]
      posted by Art Benstein subscriber on Tue Jun 26 05:48 CST 2018 > V
      - Education and Tools [200]
        posted by someone claiming to be macs70GLT on Sat Jun 30 20:59 CST 2018 > V

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Bad ECU? the infamous pink label 561 200