1996 Subaru Outback Subaru 1996 Outback Legacy 70.000 miles

Tiny
A_SANNINE
  • MEMBER
  • 1996 SUBARU OUTBACK
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 70,000 MILES
Problem

My Subaru 1996 outback legacy 70.000 miles has been dying at stop lights (or long idled portions of time) and it is little hard to start again,
skiping on high ways ( not always ) , most of the time this problem happen when the car is warm, I would say after driving it for more than 10 miles, no trouble codes in memory though.
problem doesn't happen all the time though, every once a while.
Any help
Thanks
ps: known car hardly been used for the past 5 years, it is like new shape, rides like a dream, problem started 10 days ago.
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Friday, June 4th, 2010 AT 8:14 PM

12 Replies

Tiny
MHPAUTOS
  • EXPERT
Hi there,

Thank you for the donation,

I would as a starting point replace the fuel filter and closely inspect all the vacuum hoses, did you actually do a scan? Not all fault codes give a check light, I would also get the coil output voltages check with the engine hot as you can get a coil breaking down when it has warmed up, start here.

Mark (mhpautos)
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Friday, June 4th, 2010 AT 9:34 PM
Tiny
A_SANNINE
  • MEMBER
How do u check the coil output voltages?
I have an ohmeter, will that work?
I took the car to autozone and they pluged it to a small hand held scaner and no code found?
Thanks
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Friday, June 4th, 2010 AT 10:19 PM
Tiny
MHPAUTOS
  • EXPERT
The coil output will have to be check with an oscilloscope, and preferably on a dyno to simulate the actual engine load, this is the best way to check a coil an ohm meter test will not show any load failure.

Mark (mhpautos)
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Saturday, June 5th, 2010 AT 12:05 AM
Tiny
A_SANNINE
  • MEMBER
Checked vacuum hoses all good
changed fule filter, problem still the same
u think I should change spark plugs?
Thanks
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Saturday, June 5th, 2010 AT 11:24 AM
Tiny
MHPAUTOS
  • EXPERT
A new set of plugs won't hurt but I doubt that that will fix the problem, I am leaning more to a coil problem, also have you ever had the injectors cleaned?

Mark
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Saturday, June 5th, 2010 AT 6:21 PM
Tiny
A_SANNINE
  • MEMBER
I am gonna do that during this coming week
i hope that will take care of that problem,
thanks
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Saturday, June 5th, 2010 AT 6:57 PM
Tiny
MHPAUTOS
  • EXPERT
Keep me up dated with the results, I will do a bit of research and let you know if I come up with anything else of interest with this problem.

Mark
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Saturday, June 5th, 2010 AT 7:01 PM
Tiny
A_SANNINE
  • MEMBER
Thank u so much
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Saturday, June 5th, 2010 AT 7:38 PM
Tiny
A_SANNINE
  • MEMBER
Injectors cleaned
pcv valve replaced
same problem
maf cleaned
iacv cleaned
when it goes down now hard to start (some times )
what do u think
thx
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Tuesday, June 8th, 2010 AT 3:08 PM
Tiny
MHPAUTOS
  • EXPERT
I am still of a mind that this is electrical, one check you can do, when it will not start easily, after a few cranks, pull a plug, if it is wet and sooty, more evidence that it is electrical.

Mark.
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Tuesday, June 8th, 2010 AT 4:37 PM
Tiny
A_SANNINE
  • MEMBER
MAF WAS ON THE WAY OUT
I CHANGED IT AND PROBLEM FIXED
THANKS
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Thursday, July 8th, 2010 AT 5:08 PM
Tiny
MHPAUTOS
  • EXPERT
Good result, thank you for using 2car pros.

Mark (mhpautos)
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Saturday, July 10th, 2010 AT 5:19 AM

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