High idle on my 93 4.0L
#1
High idle on my 93 4.0L
Wondering if the beast is missing a temp sensor input, believes itself cold.
After a 10 minute drive I'm still idling around 1800rpm. Sometimes a "kick down" like the old carb days, will bring the idle back to around 1000.
Curious if this is another 4.0L failure mode.... most likely suspect? TB was cleaned several years ago, but has never been removed AFAIK.
Thanks folks.
After a 10 minute drive I'm still idling around 1800rpm. Sometimes a "kick down" like the old carb days, will bring the idle back to around 1000.
Curious if this is another 4.0L failure mode.... most likely suspect? TB was cleaned several years ago, but has never been removed AFAIK.
Thanks folks.
#3
#4
Believe it or not, I've never pulled codes from this Van in 24 years! Found the EEC plug, Youtubed the jumper pin position, warmed it up completely and.....
No codes. Neither KOEO nor KOER produced so much as a BLINK in my system display! My Aero has the digital dash, so the bottom line of this LH display area is the CHECK ENGINE. I can't even get it to blink a 3 count for 6 cylinders..... as the Youtube videos show. Zip, zero, zilch, nada.
Finding a vacuum leak is going to be a joy, if that's all that is left.
No codes. Neither KOEO nor KOER produced so much as a BLINK in my system display! My Aero has the digital dash, so the bottom line of this LH display area is the CHECK ENGINE. I can't even get it to blink a 3 count for 6 cylinders..... as the Youtube videos show. Zip, zero, zilch, nada.
Finding a vacuum leak is going to be a joy, if that's all that is left.
#5
#6
Yes sir, I knew the IAC was a suspect, wherever it was! I'll test it... no doubt, an IAC stuck open (or randomly open) would cause the high idle. I'll report back my findings.... thanks or the tip.
Thread
Thread Starter
Forum
Replies
Last Post
F-250Flyer
1987 - 1996 F150 & Larger F-Series Trucks
6
09-15-2017 07:46 AM
joedangelo04
1987 - 1996 F150 & Larger F-Series Trucks
6
02-12-2017 02:08 PM