1/4 CEL arrgggghh | FerrariChat
Buy

1/4 CEL arrgggghh

Discussion in '348/355' started by dipstick1, Jul 26, 2013.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. dipstick1

    dipstick1 Formula Junior

    May 24, 2004
    312
    Connecticut
    Full Name:
    Peter Lombardo
    #1 dipstick1, Jul 26, 2013
    I am driving myself crazy , 90 348 u.s with cats. only at idle or very low rpm, everyonce in a while with no regularity , 1/4 CEL flashes or comes on long enough when taking off from a stop the car will sputter I can hear the ECU relay click, ( 1/4 bank is falling off) it does this for hardly a second and then is fine. Never comes on when driving , only after you come to a stop after about 15 seconds at idle. I have swapped ECU's, Cat ECU's, MAP's, O2 sensors, replaced both Crank sensors, Swapped ECU Relays, Am I forgetting something, any help or suggestion would be appreciated.
     
  2. bosshog8

    bosshog8 Formula Junior

    Mar 13, 2011
    448
    Pinelands NJ
    Full Name:
    Demetrius
    #2 bosshog8, Jul 26, 2013
    Have you checked the voltage at that RPM? Perhaps grounding also?
     
  3. johnk...

    johnk... F1 World Champ
    Owner

    Jun 11, 2004
    11,276
    CT
    Full Name:
    John Kreskovsky
    #3 johnk..., Jul 27, 2013
    Have you read the codes? You seem to be replacing parts wholesale without checking the diagnostics.
     
  4. dipstick1

    dipstick1 Formula Junior

    May 24, 2004
    312
    Connecticut
    Full Name:
    Peter Lombardo
    #4 dipstick1, Jul 28, 2013
    Had a code for Cat ecu, was also getting a 5/8 Cel but the new crank sensors (first item that was replaced or swapped) seemed to eliminate any 5/8 light. what components other then the cat ecu will cause the 1/4 bank to shut down. I have spent money only on 2 volvo crank sensors, everything else has been swapping components from side to side.
     
  5. chas-3

    chas-3 Formula 3
    Silver Subscribed

    Jan 28, 2009
    1,281
    Colorado
    Full Name:
    Chuck
    #5 chas-3, Jul 28, 2013
    Fuel pressure? I had an intermittent CEL with loss of power in one bank. Turned out a line from the pump to the fuel outlet was split (the pump and this line are inside the fuel tank). Once that line completely failed inside the tank the pump was just recirculating fuel within the fuel tank . . . no pressure to the injectors, bank goes dead, CEL on. Just my experience.
     

Share This Page