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Yes you could have a sticking IAC. If refuses to idle consistently.
It could be dirty or nearing the end of its life if it has over eighty thousand miles on it. Some go more easily it all depends how much was highway driving.
Having to wait say it could be a heating related problem to the electrical relays.
On your car you have two separate relays, under the glove box. Two little silver boxes.
One is for the systems computers and the other for fuel pumps.
If the magnetic coil in either one is getting to hot it will lose magnetism and open the relay.
When your engine dies it stops telling a computer to leave the relay on. So it starts to cool and after that period it restarts.
Trick is, which one, as they both look a like and function the same way.
Process of elimination is to replace one at a time with a know good or new relay. If the problem goes away after two exchanges the last one was it.
On later cars, like the one above in the post, they are built together and sometimes only one side of the two quits. Leaves you with the same problem of "who dun it!" So bad so sad, its in the whole thing!
Within these relays its a bit more complicated as they use a circuit board for connections.
In most cases, it's the solder on the circuit board that cracks breaking the currents trace or circuit to the contacts or that magnetic coil.
Reflowing all the solder together and adding more to it thickens any weak spot and repairs them.
Several owners carry a spare. A new one, a new used one or "all of them" being freshly repaired for cheap insurance!
In both cases of this problem, I suggest one to consider the of checking the amperage draw on the fuel pumps to rule out a later failure of the pumps or another relay.
Record the amount for future reference. Call it, Preventative maintenance if you will.
Hope this helps. There might another explanation to consider but like others have posted many time on this web site these are at the top of the starting to look list!
Reliability comes with the liability of good maintenance and a sprinkle of spare parts.
Reminds me of an article I read!
Thankfully, we ALL are not flying any some new to the market "flying cars" with some "delayed recalls." Nor will we be seeing any become as old as ours! (:-).
Imagine this scene......in a few years!
Oh, I'll just put the car "down" over there somewhere and see if plugging "one" of these "two" things in will help! Just then, the carpooling buddy wakes up and says, WHAT?
He then says into his microphone, Jim Bob, the new service manager, told me to keep up with it!
After the carpooler stops blinking at his waving hand and just stares;
The owner continues telling him, that the manufacturer mailed it to the "CAR" dealer for a recall bulletin but he hasn't got an appointment open yet, to install it, that's why I have it!
He said to just keep it on board, that way the vehicle has the part on board and it should meet the vehicles "planes half" for any FAA requirement existing or not for now!
He told me ABOUT where it goes and it is suppose to fix the sputtering it does AT the traffic light!
The buddy looks around and then at the ground below. He thinks, "OH MY, he really not s*** kidding me about this!"
Some old car habits, might just die, this time!
(:-)
Have a nice day in front of your garage!
Phil
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