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Old 10-25-2010, 01:08 PM   #1
Zackbo
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So I've got a hybrid that is idling like crap. Spark plugs 2 and 4 look rich, but 1 and 3 look lean. I would think a blown head gasket on the 2/4 side, but compression is really good. No codes, but misfire codes are remmed out in open source. Already replaced plugs, MAF, O2, turbo inlet, FPR, Crank and cam position sensors, blah, blah. On-boost power is great. Have WBO2 and it looks good. Stock O2 jumps from 12 to 16 afr at idle. Looks good at cruise. Timing jumps from 9 to 15 at idle. Good at cruise. Any ideas, crew?
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Old 10-25-2010, 01:18 PM   #2
DSM_Outback
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T belt right?
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Old 10-25-2010, 01:19 PM   #3
Zackbo
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Checked timing; marks looked dead on.
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Old 10-26-2010, 08:48 AM   #4
Zackbo
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keepin' it fresh
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Old 10-26-2010, 02:03 PM   #5
Turn in Concepts
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leakdown. Perhaps some valve problems.
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Old 10-27-2010, 01:51 PM   #6
Zackbo
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I've heard that valve problems will show up on a vacuum gauge. I've got a good vacuum gauge, and I'm not seeing any needle fluctuation, but I guess a leakdown test is next anyway.
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Old 10-28-2010, 08:34 PM   #7
Zackbo
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RANT: So I'm really big on updating your thread when the solution is found. Too many threads on here don't get concluded....... : end RANT

Afer dozens of hours of troubleshooting and $500 worth of sensors, my car is purring again.

Solution:

A $10 can of Seafoam in the tank.

Guess it was a clogged injector.

I've been working on cars for 20 years, and I would swear that you can't fix a car by pouring a quick-fix into the gas tank; I guess we're always learning
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