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code 18

  1. Code 18. Need help BIGTIME

    5.0L Tech
    Hello all, its been awhile since my last post. Here goes. I have a 1988 GT Vert with a 331 and a TKO 600. It has Trick Flow Track Heat heads, MSD 6AL, BBK SSI upper and lower intake, X303, 30# injectors, Long tubes, MAF conversion, roller rockers, electric fan, 6AL, 75mm throttle body, BBK CAI...
  2. pulled some codes need help

    5.0L Tech
    today i pulled codes 18 21 and 41.....18 is loss of tach to computer and spout is grounded, 21 is the coolant temp sensor sayin out of range but i just got a brand new one and 41, hego sensor voltage to low system lean....i dont know where to start but im pretty sure my symptoms are cause of...
  3. 5.0 Mustang Code 18 causes??

    5.0L Tech
    Hey guys, so i checked codes today in my 88 5.0 LX AOD, and i got code 34 which i know for a fact is my EGR, but i also got code 18, it says it means SPOUT connector? I checked and my spout connector is there, but still comes up with code 18, what would cause this :headscratch: Thanks!
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