investigate the CSI-3: hesitation, low power, rough idle, hard starting.....

[Denis]

  I checked the idle and full trottle switch while the engine is running,,,, they were ok

  The lights or accessories dont goes down when the engine slow down, the batterie is ok , alternator too.

  I did not clean the WOT connections...

  I have to well understand the CIS-3 to fixe it.

  I dont remember in witch link i have  a good description of the CIS-3.

  ________________________________
  Lets investigate :-)

  It needs more fuel and maybe the advance is affected.

  A) Fuel What supply less or more fuel ? 

  1) Fuel distr. : what makes the distr working ? air come into the engine.
  2) DPR : what makes the DPR work ? Computer ; what tells the computer if need more or less fuel ?  inputs . 
  Witch inputs ? Plate pot (There is no TPS  , is the pot on the plate, little black module on the fuel distr.) , intake temperature,  vacuum load and ?

  B) Advance what change the avdance ? ; vaccuum load , speed , air intake temp,,,,and ? knock sensor...


  Is it possible even the computer tell no fault code, the knock is bad  or oxy sensor ?


  Form http://www.sjmautotechnik.com/trouble_shooting/10vknock.html
  The diagnostic tells its the knock. Does it cause the poor idle too ?mmmmm

        ECU System, Technical Tips, 1986-90 5000/200TQ 
          Knock Sensor Defective? 
          Check Engine Light On? 
          Hesitation? Low Power? 

          If the "Check Engine" light comes on when the engine is warmed up and the manifold pressure is above 0.7 bar and the engine RPM is above ~3000 RPM, you may have a defective knock sensor, an intermittent connection inside the knock sensor or a connector/wiring problem. its what i have.

          I checked the vaccuum while the engine full trottle and idling.
          The max vac i read is 9lbs. My meter tells its intake leaks. 

  Ðenis
    ----- Original Message ----- 
    From: tihol tiholov 
    To: sparkplugvw at hotmail.com 
    Sent: Wednesday, December 15, 2004 5:06 PM
    Subject: Re: 4444" showed up


    >... sounds to me very lean....

    to me, too

    >I go up hill to go home and i notice when i accelerate i must release
    the acc cause the engine is slowing down instead of acc..... but
    sometime it push me in the seat and the car got power,,,,,, the big
    cow...

    Denis, seems like the big cow can't get its diet straight.  Either
    vacuum leak or TPS off - the ECU doesn't know where the throttle is and
    gives too little fuel.  Maybe cleaning the Idle/WOT switch connections,
    the throttle body ... My WOT was bent by some dumb sheppherd in and it
    was too rich.  I got a spare in Germany only to discover this - bending
    it back solved my unstable idle, same problem as yours for different
    reasons.  BTW, how's your battery?  I got power loss with wet
    Alternator, too.

    Bonne chance!  

    TT