suddenly running like CRAP and running is an overstatement.... Cam sensor?

[Starshooter10]

2003 Marauder, 165k mi
I bought it from the original owner, with 100k on the clock, dealership maintained with papers.
Ive been great with maintenance too.
Trans rebuilt with jmod and spring removal ~150k
New plugs and MSD coils ~160k

It was running fine, been running errands the whole day. As I was coming up on my exit it tossed out a CEL and started shaking...
As I came to a stop it stalled, I was able to start it and limp it home.... running like **** it felt much like it was running on 4, but not as smooth. it coughed and shook a LOT

I got the codes a P0340 and pending P1336

Ordered a new cam sensor... No change with the new sensor installed.

Anything else to look for?

I heard there can be chaffing problems, but everything I've seen looks fine. all the connectors appear good.

[Mr. Man]

https://www.engine-codes.com/p1336_ford.html

[justbob]

Crank position sensors are more prone to fail on these than a cam sensor. I’d start there. Worst case you’ve jumped time.


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[Marauderjack]

Blown out plug??:confused:

[Zack]

Probably blew a vacuum line off.

[sailsmen]

Probably blew a vacuum line off.

This happened to mine recently. Amazing how poorly it runs.

Will it idle?

[Spectragod]

Broken cam gear? It’ll make it run on 4 cylinders for sure.


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[1Marauder]

Probably blew a vacuum line off.

Yup, or CAI is loose at a joint.

[Starshooter10]

Crank position sensors are more prone to fail on these than a cam sensor. I’d start there. Worst case you’ve jumped time.



helpful, thanks!

I know my cam chains have a bit of rattle at startup, but it seems unlikley to jump time as im cruising on the freeway (like during the moment it started)
-If it were to jumps I'd expect it to happen during startup after sitting or while doing something stupid. burnouts racing ETC

[Starshooter10]

Blown out plug??:confused:

confirmed no

[Starshooter10]

Probably blew a vacuum line off.

funny, recently it was acting like it had a bad cat... upon inspection I found the driver side valve cover to intake breather to be loose... got a new elbow and checked the other lines.
The passenger to intake breather is about time for replacement, but wouldn't do this.


Broken cam gear? It’ll make it run on 4 cylinders for sure.

I dont think broken, despite the coughing and missing it sounds like its rotating OK.... if it has anything to do with timing Id say it hopped a tooth, but it doesnt sound like that happened.


Yup, or CAI is loose at a joint.

checked the whole intake bath, everything is tight.


This happened to mine recently. Amazing how poorly it runs.

Will it idle?

it will not idle on its own, I can give it a little gas to help iot stay running, but it really doesn't want to.

[1Marauder]

sophomoric... Grounds, power cables?

[Starshooter10]

sophomoric... Grounds, power cables?


everything seems fine.

never had power issues

[Marauderjack]

confirmed no

GOOD!!:beer:

[Marauderjack]

IAC Valve maybe??:cool:

[B.C. Bake]

Hows the fuel pump & fuel filter.....Replaced mine a few months ago,,stumbling and no idle.:confused:

[1Marauder]

Did you buy gas before this started?

[Starshooter10]

IAC Valve maybe??:cool:

definitely not, Ive had that on a previous ford, this is different...

clearly Im not making it clear when I say its coughing and running like ****... I'll make a vid

[Starshooter10]

Hows the fuel pump & fuel filter.....Replaced mine a few months ago,,stumbling and no idle.:confused:

... I actually just bought one, yet to put it on.

That's pretty clearly not the problem to me... I'll make a video showing it trying to run

[Starshooter10]

QUOTE=1Marauder;1570556]Did you buy gas before this started?[/QUOTE]
well sometime in the last 300 miles.....

Nothing that day, and I drove it for hours before it happened.

[Mr. Man]

Did you look into the crank sensor yet?

[Zack]

Your crank sensor may have a metal buildup on the tip, causing this. Pull it and look.

[Starshooter10]

Did you look into the crank sensor yet?


Your crank sensor may have a metal buildup on the tip, causing this. Pull it and look.

both of you:

I did pull and replace the crank sensor

the old one looked like it was ever so lightly touching the tone ring.

new sensor installed... same thing. still not running correct

[Invective]

Stop wasting your time and money. Any trustworthy, reputable Ford techs in the area?


https://pics.onsizzle.com/the-parts-cannon-because-sometimes-you-just-dont-have-a-472442.png

[Agent2006]

My guesses:

1.Jumped timing chain - you said you were heading to the exit, could have jumped during deceleration.
2.bad coil pack/packs -I had on an MGM and it go 20-30 mins, then stall. like clockwork. But it would restart and run smoothly.

[Starshooter10]

Stop wasting your time and money. Any trustworthy, reputable Ford techs in the area?

https://pics.onsizzle.com/the-parts-cannon-because-sometimes-you-just-dont-have-a-472442.png

I live in the SF bay area, tons of shops and dealers.... also crazy expensive. worked in a shop for years myself, but injuries have me working at 10% the speed I used to (and I now have a business that keeps me busy)


My guesses:

1.Jumped timing chain - you said you were heading to the exit, could have jumped during deceleration.
2.bad coil pack/packs -I had on an MGM and it go 20-30 mins, then stall. like clockwork. But it would restart and run smoothly.

I'm really hoping it didnt jump the timing chain.... I know I had the infamous startup rattle,but it always went away within a second.

downshifting and blipping the gas is something I may have done... been too long to remember if I did that.

best way to check the timing chain short of removing all the accessories front cover and both valve covers?

I put a full set of new MSDs on ~1000miles before this happened.
their cheap line of coils, but still a full set.

[1Marauder]

Probably blew a vacuum line off.

My first thought too... And check all clamps connections on CAI.

[Bruce Wayne]

+1 on the coils, buy motorcraft

[Starshooter10]

+1 on the coils, buy motorcraft

I'm starting to wonder if anyone read the first post.....

I'm not going to throw parts at it.
I already have a full set of new coils, the problem is not coils. I'm experienced enough to be 100% its something else. Sure the coils/plugs might have a fault,but with low miles on new cops/plugs but enough miles to be sure they are installed properly and working well.

[Zack]

I'd look at the wiring harness next.

[Starshooter10]

I'd look at the wiring harness next.

Any trouble spots to look at?

Ive heard this before buy all my wiring looks fine, not obvious chafing or loose plugs.

[Starshooter10]

Here is a video, it really isnt anything Ive seen before.


https://youtu.be/0knr9hHTOZk

0knr9hHTOZk

[boom boom]

I'd look at the wiring harness next.


Any trouble spots to look at?

Ive heard this before buy all my wiring looks fine, not obvious chafing or loose plugs.


It may not be obvious until you start wiggling and jiggling.... I had to take the wiper cowl off to find my issue. Seems it's much more common on the driver side wiper cowl bracket.


https://www.mercurymarauder.net/forums/showthread.php?t=107048

[Starshooter10]

It may not be obvious until you start wiggling and jiggling.... I had to take the wiper cowl off to find my issue. Seems it's much more common on the driver side wiper cowl bracket.


https://www.mercurymarauder.net/forums/showthread.php?t=107048

I'll look into that when it stops raining, totally doesnt match the symptoms or codes in my first post.... but I also have the speedo issue you mentioned in those post.

while its so rare that I dont think about it, it has occasionally stalled (electronics spaz, speedo drops and comes back up, and engine dies.... cycle the key and its fine) maybe a handful of timevsince I bought it 60k miles ago.

[boom boom]

I had the cowl bracket cause a no start on my 03CV because it got the range sensor wire. That is the main harness for the pcm, just depends on which wires chafe as to which symptoms you see.

[Zack]

That video is very telling.
Have you pulled the plugs yet?
You may have dropped a valve seat, which is a known issue

Or, it's out of time, which would set off the codes you have

[Starshooter10]

That video is very telling.
Have you pulled the plugs yet?
You may have dropped a valve seat, which is a known issue

Or, it's out of time, which would set off the codes you haveI'm yet to pull the plugs. Sounds like an electric issue, or cam timing.

Best way to check timing?

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[MyBlackBeasts]

I'm yet to pull the plugs. Sounds like an electric issue, or cam timing.

Best way to check timing?

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Pull the plugs before doing anything else. Your video audio is very clear that 1 or more cylinders are misfiring. May be as simple as fouled/shorted plug(s), or bad COP(s) or as bad as a dropped seat like Zach said.

[Agent2006]

Wouldn't a burnt valve or dropped valve seat show up as a low compression reading on the offending cylinder? I wonder if you'd hear anything weird on that side of the exhaust out the tailpipe.....

[Rserrata1992]

Wouldn't a burnt valve or dropped valve seat show up as a low compression reading on the offending cylinder? I wonder if you'd hear anything weird on that side of the exhaust out the tailpipe.....



I heard a nose today outside my tail pipe while it started bogging when I stepped on it


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[decipha]

the codes you posted originally are cylinder 4 misfire and crank sensor failure

have you investigated cylinder 4 ?

[Starshooter10]

the codes you posted originally are cylinder 4 misfire and crank sensor failure

have you investigated cylinder 4 ?.... Definitely more than a single cyl missing....

And I did not post codes for a misfire... Both codes are crank or cam sensors

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[decipha]

ah i see you are correct you posted p0340. I read it as p0304 since im more used to it I suppose. In 10+ years of custom tuning fords I've never once came across a p0340 code. Another reason why I always recommend posting the code meanings with codes #s.