Last post on Nov 26, 2006 at 10:18 PM
You are in the Ford F-Series
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Ford F-150, Ford F-250, Ford F-350, Ford F-100, Truck
#241 of 2180 Engine Misses after warm-up
Nov 22, 2002 (1:19 pm)
My 2000 F-150 (80k miles)has developed a problem. After it has warmed up, approx. 5 miles driving, the engine starts to miss, sometimes bad enough to make it difficult to maintain 55 mph. It does this for a few minutes then goes away. Runs great otherwise, even when starting out cold. Ford garage replaced #4 coil wire for $150 (supposedly computer said it was bad) but problem still remains. Any suggestions, I'm hesitant to take it back to Ford garage for more "problem solving experimentation". Fuel filter was changed about 3 months ago.
#242 of 2180 88 altenator update
Nov 23, 2002 (5:56 am)
Just wanted to say that I replced the altenator and everything is fine. Thanks for the info.
#243 of 2180 miss after warm up
Nov 25, 2002 (11:40 am)
Try replacing the AIC
Nov 25, 2002 (3:30 pm)
I'm about to ask a very stupid question and I know I'll slap my forehead when you tell me the answer, but what is an AIC?
Nov 26, 2002 (7:33 am)
Automatic Idle Controller
Nov 26, 2002 (1:59 pm)
Is that the same as a IAC valve?
#247 of 2180 i think it is
Nov 26, 2002 (7:46 pm)
Probably meant iac = idle air control.
When the IAC goes bad, the vehicle fails to idle and just stalls, thus making it appear that the mechanism is an automatic idle controller..
but its really an IAC..
Nov 26, 2002 (8:54 pm)
The truck is an 2000 f-350 4x4 crew cab short bed the problem im having is an vibration also A humm that seems to be coming from the rear of the truck, ford has replaced the driveshaft twice and rebuilt the rear axle twice,replaced the mating part between the transmission and transfer case, still have problem, starts at 72mph-80mph worse on decell from that speed,anybody else with ths concern??? also I have 4:30 ratio, any suggestions would be of great help, ford is confused.not me, its your typical ford P.O.S problems and ford wont admit it! have been battling this prblem since 2000 miles old, now has just over 26000 miles, Thanks in advance.
Nov 27, 2002 (8:47 am)
Maybe someone else has an answer, but 80 mph is awfully fast to be running with 4.30 gears, JMO though. There is a lot of rotating mass back there. What kind of tires do you have? I am assuming you have a SRW model. It could be that you got a dreaded lemon, but there are lots of satisfied Superduty owners out there, including myself. Have you tried another dealership? I know your truck is still under warranty, but maybe think about paying a very qualified independent mechanic a couple of hours of labor to get his opinion of the problem. I had a Linclon TC once that developed a vibration in the rearend. The dealership wanted to rebuild the rear axle. I took it to an independent and he replaced the rear U-joint for $30 and fixed the problem.
I don't have your problem and hopefully never will. You may have already considered this, but just throwing out some ideas.