QuestionI took your advice and called a brake shop about my 1990 Cadillac Fleetwood 60 Special FWD. He said it didn't sound like the brake booster to him. Though he is willing to replace it. If it helps any, I checked the codes.
First I reset the codes. I started the car let it run for a few minutes, then killed it with the key. I checked the codes and got E41 and E55. I then started the car, let it run for a few minutes, then killed it by stepping on the brake. I checked the codes again, but this time the same codes came up along with F32.
Sorry to bother you again, a response would be appreciated.
AnswerE41 = No cam sensor signal.
E55 = Throttle Position sensor misadjusted.
F32 = BCM (computer) to PCM (computer) Data problem.
Clear all the codes and then re-enter diagnostics and see if any codes return.
Try running the vehicle without driving it and see if any codes appear. If NOT, drive the car and recheck for codes.
QUESTION: Does your instant fuel economy vay while driving ?. Do you get a reading of "0" all the time ?
