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Mthomas    0

Out of the blue engine is surging and dying and check engine is either blinking or staying on.  Sometimes will run with no issues.  Scanner will not read codes and jumper between E1 and TE1 will not show codes.  ECU? Any assistance would be great.

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sha4000    38

It may be the ECU but could be something else. When the check engine is blinking it usually means that the engine is misfiring and in danger of damaging the cats.

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Lexus_DK    6

Did you recently do any type of service to the vehicle prior to the engine idling erratically/surging?

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Mthomas    0

No.  Everything was normal until this started to happen. 

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Lexus_DK    6

hard to say. Check the throttle body for carbon build up on the plate, clean it. Check the fuel pump dampers. Check for vacuum leak. Check mass airflow sensor.

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Mthomas    0

Can't understand why analyzer can't connect or be able to jump terminals to obtain check engine code.  

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Mthomas    0

Pulled ecm. Anyone have luck with a supplier for rebuilt unit. Many out there, not sure who to trust. 

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LSPaul    6

Also, check the connectors under the dash, where the wiring harness from the engine compartment goes into the distribution block (fuse panel).  Disconnect, wiggle around and re-install first.  If you have Deoxit on hand, use that on the connector contacts. The lack of a signal at the diagnostic connector makes me think you're not getting proper connections at this junction block (I went through this when I bought my '94 and over several months, dug through everything). 

As for the ECU itself, I don't have a suggestion for a vendor to replace electrolytic capacitors inside the ECU.  There's probably more suggestions out there as to who NOT to use for recapping (I borrowed a 'rebuilt' box from an acquaintance when I had to replace caps in my ECU, and it was worse than the original box!).   If you have any electronic soldering skills, consider re-capping the ECU yourself; *much* cheaper than sending it out.

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Spartan0536    13

I am having surging issues myself, my mechanic said it has to be the ECU after testing and cleaning the IACV, throttle body, checking all electronics.

I contacted LScowboyLS on Facebook, I am currently attempting to make sure that he is legitimate, his posts on ClubLexus are extremely detailed.

Interestingly enough in my conversations with him he has self proclaimed to have worked for NASA with his father at the Marshall Space Flight Center in buildings 4227 and 4708 @ redstone arsenal near Huntsville Alabama. If this is true this guy is an extremely rare find, which is why I am trying to verify his credentials. On his facebook page he has tagged himself with the ASE Master Mechanic certification, unknown if this is legitimate.

Any insight into him from anyone?

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M.Yasir    12

Check engine light blinking, why jumping directly to the poor ECU, check your spark plugs or ignition coils, i had the same issue my CEL was blinking suddenly and car started jerking at 60 MPH while at idle it will not jerk

I replaced all the 8 spark plugs and kept the same ignition coil... butter smooth it is

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