When I start the car, especially when it's a cold start, it revs to 2800-3k and sits there for 15 or so seconds. Is this bad? I'm thinking everything in there is dry on a cold start and high revs can't be good? It settles down to ~1k after that and I put it in drive and go. Am I overreacting?
To the original poster and both you guys that replied: Your car's really hit 2800+ rpms??? Mine doesn't go anywhere near that; I have an manual trans so maybe that is why I'm lower at about half that RPM on a cold start. But still 3000rpm seems excessive.
My car revs to 1,200-1,500 rpm's initially upon cold start up, and my '07 is supercharged, as well. 2,800 rpm's seem VERY excessive.
Cold weather for me is approximately 55 degrees. The RPMs for a cold start are initially 1500, then drop to 1000 within about 15 seconds and then gradually drop to normal idle as I drive the car.
So from what I'm reading, my car sits 1k higher for quite a few extra seconds. Sounds like it needs to go back so I don't do any harm right? Just want to make sure I'm not wearing the mechanic out when I don't need to be. Thanks for the input!
don't feel like your wearing out the mechanic.. in my experience trust me its ok to be a little paranoid, worry about something that may or may not be wrong is ok get it checked but to worry about something and say its probably nothing can be pretty costly!
You sure it's 2800+? Because it is normal for it to go into fast idle when it's cold, but that shouldn't be more than 1500 RPM at the most.
Sometimes you can kind of refresh the idle if you unhook the battery for 30 minutes and then rehook it and start the car, let it run for a minute or two then turn ac on and let it run for a few more minutes to get to operating temp. Then drive around with ac still on to give it a load. That used to be the recommended way to recalibrate after mods on some other late model fords. It used to be in the owners manual, I remember reading it either in my '01 stang or '03 ranger. My brother had a ranger that would do the opposite(start and idle low then shut off) He did the above and it went back to the stock idle and never had problems again.
i would talk to whoever loaded your tune. the same thing happened to me. i contacted the tuner and he emailed a new tune. i took about five minutes to fix. good luck
I took it back after the first week, we went through 3 corrupt tunes before getting a good one. Never a good thing when the mechanic tells you "so after I was done with it, it would have exploded if so-and-so wasn't here to tune it" but at least he shot straight with me. Throttle body is new-ish (less than 1500 miles since it was installed) and the MAF sensor was new when the throttle body was new. I notice it even more now that it's getting cold out. Not being as mechanically inclined as some of you, I appreciate the input. It's easy for someone to talk circles around me since I believe somewhere in the engine there may be little green men that are responsible for the timing (ok not really). Would it be out of line to get a second mechanic's opinion?
