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Old 01-15-2013, 01:32 PM   #11
swansong
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Nope, local shop in my small town.
Ford says 100k or 120k I think, but most folks on this forum say to do it every 80k or less. Probably a good idea for you to start thinking about getting it done!
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Old 01-15-2013, 03:11 PM   #12
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Quote:
Originally Posted by SVTisRight4me View Post
u didnt take it to the ford dealer did u?
when does ford say the timming belt should be changed?
currently at 78k+
Start your own thread. The problem that the OP is having in this thread is not even related to a timing belt.

Look at the threat title above where these posts are. You'll see something like Focus Fanatics> Ford Focus Tech Discussions> General Technical Chat> SVT with sudden rough idle, power loss.

Click on "General Technical Chat", and a new list of threads will appear. At the top left side of that list, you will see a yellow button that reads "Post New Thread", click on that, and describe your problem, your vehicle, and your mileage. That is the best way to get answers on this forum. Thanks for posting!
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Old 01-16-2013, 09:11 AM   #13
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Fuel filter and pump replaced. Fuel pressure was abysmal before, it's optimal now. Filter was likely original (135k miles!) and pump was full of crud. Car will start now, and may run well for 5-10 seconds, then falls on its face and stalls. Seems to do better with throttle applied. (This is what shop told me, haven't driven it myself.)

They're stumped, and I told them not to throw parts at it, I'll just take it home and try to figure it out myself. I think it's drivable at this point.

Still to check:
  • Vacuum leaks, I checked the easy ones, haven't gotten to all of them yet. Shop wanted $80 to do a smoke test. Eff that.
  • Coil pack pigtail wiring.
  • MAF sensor. Don't want to replace it if I don't have to, they're surprisingly expensive.
  • Dump some Heet in the tank, possibly due to water in gas.
  • Try to return to stock tune, reset ECU by removing negative cable. Perhaps ECU is confused with a properly operating fuel system?
  • Send a datalog out to Tom, maybe he can see something I can't.
Any other suggestions..?
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Old 01-16-2013, 09:24 AM   #14
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Maybe a failing o2?

Before changing the primary o2 sensor (for the second time), my car would run fine for a bit, and then randomly run like garbage. It too was better with some throttle applied than with it being at idle or even just above.

Should throw a CEL, but mine didn't always...
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Old 01-16-2013, 09:25 AM   #15
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Front O2 sensor replaced less than 1k miles ago. It was throwing codes for that. No more codes, and running condition improved after the change.
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Old 01-16-2013, 10:40 AM   #16
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...of course it did. Bleh. I'm running out of ideas.

On a scale of one to shit, how does it drive?

It seems like you may have just a bunch of minor-ish problems that finally added up to something substantial?

How're the plugs? Wires (do they arc when wet)? I'm leaning toward electrical.
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Old 01-16-2013, 10:43 AM   #17
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I haven't driven it since the fuel pump was replaced, but it was about 9/10s of shit when it first happened. I'll be picking it up tonight after work.

That's what I'm thinking too, a bunch of little stuff making it run a bit goofy, then the fuel filter/pump was the straw that broke the camel's back. Plugs and wires are new-ish, less than 7k miles on them.
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Old 01-16-2013, 10:52 AM   #18
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Hmm....alright. Well, I'd start with the coil pack pigtail I guess...I think I recall having to solder on a new pigtail for my ZX3's coil, way back in the day.
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Old 01-16-2013, 05:08 PM   #19
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So. Go to pick the car up at shop after work, service manager tells me its not really driveble and will drop it off at my house free of charge in the morning. I went to poke around under the hood one last time, but now it won't start again... Turns over just fine, just never fires off. Starting to get worried now.
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Old 01-16-2013, 05:18 PM   #20
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It sounds like you're getting fuel. Did they check for spark?

I recently bought a focus with a malfunctioning crank sensor and a dead O2 sensor. Drove like crap!

Maybe your crank sensor has died? Maybe a bunch of bits of nasty that wrecked your fuel pump is now in the injectors?
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