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Old 03-29-2013, 07:41 AM   #1
TommyTooHi
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Angry P1131 - major drivability issue SVT

UPDATE- Main thread:
http://www.focusfanatics.com/forum/showthread.php?t=313007
Post in that one, please- thanks!














Original post:
Need assistance from the guru's in here~~
Dang it!
'04 SVT won't idle for squat, plugs are DRY, Tommy is disappointed.
Saw a brief P0171 the other day (cleared that, ran fine), then when the stumble started, saw a #2 cylinder misfire code (cleared that), but the full monty appears now as
P1131.

Car ran fine, I parked it for two days, but when I started it up yesterday it stumbled at idle. I have to keep revs up @ stops, but it actually sorta runs OK once rolling; lots of popping on decel, though.

At work yesterday, I found the vacuum hose elbow at the sensor on the passenger side (at the end of the fuel rail) hanging loose - plugged it back in, no change. I blame the guy that R+R'd the alternator for knocking that loose.

Last night I popped the wee vacuum tubes off, (behind the intake mani) and found no issues.
PCV hose appears OK
I replaced the dang fuel filter last night (+ changed oil while I was under there).
Stock air filter box is dry.
There is a newish (20k ago) Bosch front O2 sensor that I replaced at 100k for 'good luck'.
As well, I replaced the PCV valve at that time.

It sure FEELS like a fuel starvation or a classic vacuum leak, but I can't ID any leak(s). Fuel filter contents showed it wasn't a wasted effort.

Any verifiable info would be appreciated, thanks!

-T_T


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Last edited by TommyTooHi; 04-02-2013 at 07:40 AM.
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Old 03-29-2013, 08:10 AM   #2
barker1964
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Cars

I think we need to CHECK the misfire, erase the PCM and test drive to see if the CEL comes back on. To fix the misfire, start looking at stuff like spark plugs, coil, plug wires
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Old 03-29-2013, 08:15 AM   #3
TommyTooHi
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CEL is secondary; cleared it last night.
I won't drive it much farther in this condition.
Again, all 4 plugs are dry, wires are beefy and 20k old... I'll look up a test for coil pack, but I'm guessing that's off/on.
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Old 03-29-2013, 02:55 PM   #4
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Moved to "General Technical Chat".
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Old 04-01-2013, 07:53 PM   #5
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Oops

Quote:
Originally Posted by zetecDon View Post
Moved to "General Technical Chat".
main thread:
http://www.focusfanatics.com/forum/showthread.php?t=313007

So did I - created a new one, actually. Apologies.

STILL looking for good diag steps!

Drop in here if you can help, thanks!



-T_T
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