Looks like an interesting option over using a normal OBD code reader/scan tool, IF you've got the spare Win 7 laptop to use with it. The other less satisfactory method is an ELM clone used with a smart phone.
NO you can't use something like that for Ford direct linkup, that's a paid service NOT avail. to just anyone for free. The better/more expensive IDS tool setups often include a short term license to that service according to their advertising.
Correct, flashing PCM is a web service now and you need a subscription for that. Although it will have some of the older calibration files that probably don't apply to your model year. In any case I don't recommend flashing with this knock off device as PCMs are expensive to replace.
It will only work on Windows XP and for that you will create a virtual machine. It should come with all the instructions, poorly translated at times. If you do end up getting it and need tech help, let me know.
Thanks again for all the help. After going through this whole process, only thing I can find is the parameters for the throttle body are off, and will not stay constant. I will be replacing the throttle body later next week, and then full reset to see how she will react. Fingers crossed!
If it happens when your AC is on and you're low on refrigerant, and it's constantly cycling the clutch on and off on the compressor it can cause some idling issues.
I actually had a idling issue on my car recharged my AC system that was low haven't had a problem since.
Not saying you are low on refrigerant but a constantly cycling on and off compressor clutch can make a unpleasant idle situation.
The refrigerant pressures are correct / in range. The idle fluctuation is not in rhythm with the engagement / disengagement of the AC clutch. That is if the AC is constantly engaged, the idle is fluctuating from 500 to 1000 RPM.
A vacuum leak will make the TB chase it all around as it tries to correct for it similar to what the older IACs do. Just got finished with a Nissan with the same problem, found the leak and problem quit. In that case the TB was locked against the off stop as it was trying to go lower than the stop would let it go in an attempt to lower the idle speed.
'If it were a vacuum leak it would roam at any idle load or not.'
You'd think that, but then you would likely be wrong. There are so many ways they can present it is not funny. BTDT.
There is not a lot of idle trim fuel range on these. When the engine lowers rpm more the IAC has to open more trying to correct it and the PCM has to add more fuel to cover that, it can then hit the idle fuel trim limit and motor goes whacky because there is no more fuel. At normal idle speed the IAC has to add much less air, it may even have to take away air because of the leak and the fuel trim then covers it.
Some of that depends on where the TB aircrack is as well, that physical location is closely linked with IAC ranging, whether it has to go high or low to control idle speed.
You can have a vacuum leak, and as long as it is within fuel trim range the PCM will accept the fast speed and simply drop it back to normal using the IAC. Once you pass the fuel limit is when the leak begins to mess the idle quality up in roughness. You get closer to that the more the IAC has to open, or the bigger the vacuum leak gets.
See, I'm having an issue with mine dropping way to low and my car stalling while in park or at idle and then park and idle when my rad fan kicks on it's like my engine takes a fat hit of crack and losses its shit until the fan shuts off
I will say do not use an aftermarket throttle body. I made that mistake ( an expensive one at that) my car would get stuck at 1500 rpms when ever I'd rev the engine and ultimately never fixed my idle hunt either
Hello fellow Focus aficionados,
Been having a very slow leak show up at the junction of the transaxle and the motor. I think I pinpointed where it is coming from exactly (at least I think). See pics for oil leak. Showing both sides of motor and transaxle.
I have seen one post about a similar...
Hey folks, first post on here. I have a 2001 Focus SE with the Zetec DOHC, and it developed some issues after I took off the EGR valve and cleaned it. Here's the story:
My engine was running perfectly fine, but I was bored and decided that cleaning my EGR valve would be a good use of my time...
I! Have a late model 02 ford focus, . It idles slow sometimes stalls at a stop but while driving revs up real fast. Any suggestions? I need help bad [email protected] is my email address. Thank you in advance
I had to replace temp sensor in my 2002 zetec dohc engine. I finished drove car and noticed a battery light. I realized I forgot to plug in alternator so I plugged it in cranked up and everything was fine for a second then suddenly I got a cylinder 2 and 3 misfire. I opened hood and noticed my...