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Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

2002 mercury villager running rich

  • jerry r
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6 years 1 month ago - 6 years 4 weeks ago #33647 by jerry r
2002 mercury villager running rich was created by jerry r
total trims at idle -9 at 3000 rmp -15 total .injectors are good tested fuel pressure reg passed ,map test tested good, replaced plugs and wires a year ago. has a strange drop out on primary current test. picture below
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Last edit: 6 years 4 weeks ago by jerry r.

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6 years 1 month ago #33648 by Cheryl
Replied by Cheryl on topic 2002 mercury villager running rich
Does it run bad or anything?
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6 years 1 month ago #33649 by jerry r
Replied by jerry r on topic 2002 mercury villager running rich
yes I feel a misfire ,and its burning a lot of gas

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6 years 1 month ago #33650 by Cheryl
Replied by Cheryl on topic 2002 mercury villager running rich
Check mode 6 for misfire counts??

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6 years 1 month ago #33651 by jerry r
Replied by jerry r on topic 2002 mercury villager running rich
no haven't yet

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6 years 1 month ago #33656 by Noah
Replied by Noah on topic 2002 mercury villager running rich
Does it hold fuel pressure key on engine off?
"Ground cannot be checked with a 10mm socket"
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6 years 4 weeks ago - 6 years 4 weeks ago #33659 by jerry r
Replied by jerry r on topic 2002 mercury villager running rich
it holds at 39 psi with key on engine off, 35 psi at idle
Last edit: 6 years 4 weeks ago by jerry r.

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6 years 4 weeks ago #33675 by jerry r
Replied by jerry r on topic 2002 mercury villager running rich
fuel trims total -20 at idle intermittently, tested at the distributor with a spark tester tested good at 30kv strong blue spark, but nothing at 40kv.

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6 years 4 weeks ago #33676 by Chad
Replied by Chad on topic 2002 mercury villager running rich
That current waveform looks like an open plug wire.
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6 years 4 weeks ago #33682 by Noah
Replied by Noah on topic 2002 mercury villager running rich

Chad wrote: That current waveform looks like an open plug wire.

For days now I've been trying remember what that giant tail on the current ramp is all about!
I know there's a video I could link in but I just can't seem to find the one...
"Ground cannot be checked with a 10mm socket"

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6 years 4 weeks ago #33684 by jerry r
Replied by jerry r on topic 2002 mercury villager running rich
it showing up on all cylinders

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4 years 1 month ago #51362 by SalMarciano
Replied by SalMarciano on topic 2002 mercury villager running rich
Jerry,

We're you able to track down the issue?

I have a 2000 Quest with 128K miles with new plugs, wires, O2 sensor. MAF reading properly and it runs good.

I just can't get rid of the recurring P0306. I just changed injector #6 (it did test at 20 ohms) and still have the misfire code.

I was seeing negative -14 to -20 STFT at idle before the tuneup...and that didn't change with the new injector. Can't figure it out.

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4 years 1 month ago #51375 by VegasJAK
Replied by VegasJAK on topic 2002 mercury villager running rich
As Chad said open plug wire.
Secondary turn off oscillation. Coil buildup secondary voltage with no place to go due to open plug wire.

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