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 6 months ago - 6 years 6 months 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 6 months ago by jerry r.

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Cheryl
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6 years 6 months ago #33648 by Cheryl

Replied by Cheryl on topic 2002 mercury villager running rich

Does it run bad or anything?

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jerry r
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6 years 6 months 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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Cheryl
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6 years 6 months ago #33650 by Cheryl

Replied by Cheryl on topic 2002 mercury villager running rich

Check mode 6 for misfire counts??

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jerry r
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6 years 6 months ago #33651 by jerry r

Replied by jerry r on topic 2002 mercury villager running rich

no haven't yet

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Noah
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Give code definitions with numbers!

6 years 6 months 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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jerry r
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6 years 6 months ago - 6 years 6 months 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 6 months ago by jerry r.

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jerry r
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6 years 6 months 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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Chad
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I am not a parts changer.

6 years 6 months ago #33676 by Chad

Replied by Chad on topic 2002 mercury villager running rich

That current waveform looks like an open plug wire.

"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right. :-)

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Noah
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Give code definitions with numbers!

6 years 6 months 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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jerry r
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6 years 6 months 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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SalMarciano
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4 years 6 months 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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VegasJAK
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Silencing the Parts Cannon

4 years 6 months 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.

Peter Bishop: Walter what are you doing?
Walter Bishop: I'm making myself smarter.
Fringe

"an open mind let's knowledge flow in and wisdom flow out for a man who has neither never listens to those who have both".

Being wrong doesn't bother me, it's being right and not understanding why that does

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