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#866322 - 02/08/06 07:03 PM Any tricks to replacing the crank sensor?
fastsvo Offline
Member

Registered: 10/29/03
Posts: 288
In an effort to fight a miserable pinging problem in my '94 Vic (tried all the basic stuff), I figure replacing the CS for $14 bucks might be well worth it. Any tricks to this job? If that doesn't work, then I'll throw down the big coin on a new MAF. Thanks

Eric

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#866323 - 02/08/06 07:18 PM Re: Any tricks to replacing the crank sensor?
DazedNConfuzedV8 Offline
Climber

Registered: 01/01/05
Posts: 523
Loc: Boca Raton, FL
My exgf's grand marquis would ping with a 160 degree stat, TR6 plugs, and 93 octane. It would also ping with the timing spout removed. The crank sensor failed on it, and when i replaced it, it cured the pinging problem. I never would have belived that would have been the problem.
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2006 CVPI 4.6 4V swap in progress
1985 Mercedes 500SEL 6.0 SOHC AMG
2007 Chrysler Inferno Red 300C SRT 8 supercharged
2005 Mercedes S500 w/AMG appearance package
2006 Lexus IS350 (13.2 @ 105) stock
2000 Ford Crown Victoria 5.4 powered by Vortech (for sale)

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#866324 - 02/08/06 10:59 PM Re: Any tricks to replacing the crank sensor?
Steve83 Offline
Poobah

Registered: 10/03/04
Posts: 7445
Loc: Memphis, TN 38002, USA, Earth,...
Why are you guessing wildly??? What exactly do you consider "all the basic stuff"?
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Walk softly & carry a BIG SIX ! ! !

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#866325 - 02/08/06 11:36 PM Re: Any tricks to replacing the crank sensor?
BMFer Offline
I'm your huckleberry
Grand Poobah

Registered: 12/04/05
Posts: 13583
Loc: 30106
The crank sensor is not very hard to replace, but the idea that it can cause pinging baffles me. If your car runs & starts ok when you turn the key, the CKP sensor is A-OK.
_________________________

'13 Coyote 5.0

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#866326 - 02/09/06 01:35 AM Re: Any tricks to replacing the crank sensor?
fastsvo Offline
Member

Registered: 10/29/03
Posts: 288
Well, I have changed my plugs, plug wires, cleaned the MAF, ran codes, fuel injector cleaner, Marvel Mystery oil in the fuel tank, watter wetter in the coolant and have performed the Sea Foam stuff a couple of times. Still pings like crazy. I even took the upper intake off and cleaned out the carbon build up. So it's time to say screw it and start replacing some of the parts that can be either a hit or miss when diagnosing this type of a problem.

Of course, any suggestions are always welcomed

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#866327 - 02/09/06 10:14 AM Re: Any tricks to replacing the crank sensor?
Steve83 Offline
Poobah

Registered: 10/03/04
Posts: 7445
Loc: Memphis, TN 38002, USA, Earth,...
So how do you know it's "pinging"? Are you getting misfire codes? Or are you just hearing something you can't ID? It might just be a bad cat or loose shield.

Pull the plugs, inspect them (compare them to the inside back cover of Haynes), & do a compression test. You might have carbon buildup in the cylinders, creating high compression & hot spots.
_________________________
Walk softly & carry a BIG SIX ! ! !

. . .

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#866328 - 02/09/06 11:17 AM Re: Any tricks to replacing the crank sensor?
stevo Offline
Over the Hill

Registered: 05/14/03
Posts: 2738
Loc: Wisconsin--most of the time
Are you sure you have the correct temp range t-stat in your engine?

If you have 0 mods on the engine, then you should be running 192 degree t-stat!

I would agree with the above posters. Don't continue to throw money away by replacing everything. A CPS sensor WOULD NEVER give you pinging. The CPS sensor talks to the PCM and control fuel and spark!!!!
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#866329 - 02/09/06 01:01 PM Re: Any tricks to replacing the crank sensor?
fastsvo Offline
Member

Registered: 10/29/03
Posts: 288
Well I was running a 180 degree t-stat and it did help, but now it's back to the stock 192 deg. t-stat, because my commute has been chopped down to a 4 mile daily commute. I know it's pinging because when I tip into the throttle, the pinging/rattling begins and will stay there until I let off the throttle. Even at WOT acceleration it will ping. I must say I am pretty familiar with the sound of pinging, because my SVO loves to do it as well, but for other reasons.

Now, I do get an occasional CEL as I am driving the car, but when it comes time to pull codes, I get nothing. Not even the fancy Snap On code reader can tell me anything worthwhile.

Shouldn't all that Sea Foam and MM Oil pretty much clean out the carbon deposits in the CC area? The plugs have a normal color to them (not white = lean).

Thanks guys,

Eric

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#866330 - 02/10/06 02:06 AM Re: Any tricks to replacing the crank sensor?
stevo Offline
Over the Hill

Registered: 05/14/03
Posts: 2738
Loc: Wisconsin--most of the time
Eric:
Sound like you have carbon buildup in the CC area. I'm not a fan of Seafoam as I'm really not sure that it cleans out ALL the nooks and crannies.

That said, it may be that your fuel injectors are clogged up. Or possibly a restricted exhaust.
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Signature removed. See rules.

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#866331 - 02/10/06 02:14 AM Re: Any tricks to replacing the crank sensor?
BMFer Offline
I'm your huckleberry
Grand Poobah

Registered: 12/04/05
Posts: 13583
Loc: 30106
If you have access to a Snap-on scantool, I'm sure you can borrow a bore scope from somone to look in there with too. Pull some plugs & look around in the cc's with the borescope. If no major buildup, suspect possible excessive exhaust backpressure as stevo suggests.

BTW, what kind of plugs are they? How many miles on the car?
_________________________

'13 Coyote 5.0

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