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Originally Posted by Harold Broerman
hi all, harold again, we checked all systems as to the tips you all sent in, such as secondary port vacuum system, and it holds 12hg. going under the plenum and also back to the pump.fuel pumps are new as are o2 sensors.car still shows a code 61, and wont run over 3000 rpm.if engine passes the vacuum pump test ,can i assume everything is ok under the plenum,or do i need to take the plenum off and check furthur?also, is there a way to check the ecu. i really appreaciate your input. thanks again Harold
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I may be wrong but a vac test on the line going to the 2* system from outside (vac pump) will only test the check valve and the tank(?), and that the control solenoid is not leaking vacuum. The actuators maybe (I stress maybe ) tested using the vac line to the MAP under the ECM as it T-ee's off of the vac feed from the solenoid to the actuators.....I THINK????
Not having a Tech1A was why I was mad when I finally concluded that my ECM was the root of my code 61....without it and it's testing software I couldn't do all the diagnostics...I had to make assumptions and follow either a "yes" or "no" answer to the end of the diagnostic tree to find I had "guessed" wrong. Had I just swapped out the ECM before I pulled the plenum I would have seen that the ECM was at fault from the get go.
Tom
If I had a spare ECM I would lend it to ya to test...but it's now in my car!
