Mass Conversion Done, but rough idle.

Discussion in 'Fox 5.0 Mustang Tech' started by oo7thenova, Dec 7, 2003.

  1. I just did the mass air conversion on my 88 5.0 coupe.

    the runs well, but it does get moderate rough idle.
    any suggestions on what to check?
    How much can i tighten the ECU connector to the Comp??

    how can i check if the Mass air sensor is bad?

    also when i bought the car it came with a small battery. the volt gauge stays a little above the Low red marks. can that be a problem??

  2. Make sure u solder all conections.If it came with the blue quick connects thats your problem...I had this problem when i did my conversion....Good Luck
  3. Did you unplug the vacuum line from the BAP sensor?