Dead spot in idle
Thread Starter
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Senior User
Joined: Feb 2003
Posts: 369
Likes: 0
From: Bronx, New York
Dead spot in idle
OK guys, here is a challenge....On my 97 5.4, I am trying to fix this "dead spot" in my RPM range. It is driving me crazy, and I have reached my wits end. At about 1200 - 1400 rpm at idle, or 900-1100 rpm in gear, I have a rough or "dead" spot in my engine. This only happens when I use light throttle pressure, if I use more than 1/4 throttle, the motor revs past with no problem.I get a bit of a rough idle at rest after coming off the highway as well. I have only been getting 9mpg around town. Since this has happened, I have changed everything listed in my profile, as well as 6 coils, spark plugs, fuel filter, TPS, IAC, PCV and the hose/elbow into the intake, 8 fuel injectors, and cleaned my MAS. The ECU shows no codes, and I have even tried to hold the motor at the "dead spot" trying to force the problem into a trouble code, but nothing happens. PLEASE HELP !!!!!!!!!
Thread Starter
|
Senior User
Joined: Feb 2003
Posts: 369
Likes: 0
From: Bronx, New York
Dead spot in idle
I fouind a questionable vac. hose today, and changed it. I also ran some of that GM Top End cleaner through the motor & changed the oil. Seems to run better, but dead spot is still there. HELP Help HELP !!!!!!!!!!!!!!!!11
