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#2218400 - 01/16/11 02:18 PM Thrermostat changed and now misfireing
BigMerc96 Offline

I know nothing
Posting Addict

Registered: 06/05/10
Posts: 19868
Loc: I can see Detroit from here!
Let me start off by saying, I know what I did. I changed the thermostat after draining about 1/2 gallon of coolant from the radiator with the engine stone cold, as in hadn't started in 2 days. I figured that was enough to not spill much, right? Wrong.

I unbolted the thermostat and quite a bit spilled out. Nice big mess. I'm almost 100% sure that some coolant has found a nice warm home in the plug wells and is the cause of the miss.

My question is, whats the best way to dry the plug wells? keeping in mind its like 20*F and I don't have an air compressor.

At least the car is reaching operating temperature correctly now.


Edited by BigMerc96 (01/16/11 02:21 PM)
_________________________
-Steve

2006 Audi A6 ~132k miles, stock.
1998 Mercury Grand Marquis LS HPP ~100k miles, slowly acquiring modifications.
1997 Town Car Cartier ~145k miles, Ported Plenum, Gutted Airbox, Contour E-fan Retrofit, Dual exhaust with Magnaflows, cats deleted, MSD Ignition, KYB Gas-A-Justs, P71 front bar, air ride reinstated, Projector retrofit, Caddy 4-note horn retrofit, Wood rim steering wheel retrofit, holistic weight reduction as the parts fall off..
1996 Mercury Grand Marquis GS 117,485mi. R.I.P. 7/14/12 frown

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#2218449 - 01/16/11 03:29 PM Re: Thrermostat changed and now misfireing [Re: BigMerc96]
BigMerc96 Offline

I know nothing
Posting Addict

Registered: 06/05/10
Posts: 19868
Loc: I can see Detroit from here!
Anyone? I'd like to fix it while there is still light out since I don't have a garage. Sorry if i seem impatient, I just don't want to drive it tomorrow with a misfire.
_________________________
-Steve

2006 Audi A6 ~132k miles, stock.
1998 Mercury Grand Marquis LS HPP ~100k miles, slowly acquiring modifications.
1997 Town Car Cartier ~145k miles, Ported Plenum, Gutted Airbox, Contour E-fan Retrofit, Dual exhaust with Magnaflows, cats deleted, MSD Ignition, KYB Gas-A-Justs, P71 front bar, air ride reinstated, Projector retrofit, Caddy 4-note horn retrofit, Wood rim steering wheel retrofit, holistic weight reduction as the parts fall off..
1996 Mercury Grand Marquis GS 117,485mi. R.I.P. 7/14/12 frown

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#2218520 - 01/16/11 05:39 PM Re: Thrermostat changed and now misfireing [Re: BigMerc96]
JoshH Offline
Member

Registered: 03/31/06
Posts: 183
Loc: Northern California
Try and let it idle for a while, the heat from the engine will eventually dry it out I would think.
_________________________
2000 P71

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#2218528 - 01/16/11 05:56 PM Re: Thrermostat changed and now misfireing [Re: JoshH]
BigMerc96 Offline

I know nothing
Posting Addict

Registered: 06/05/10
Posts: 19868
Loc: I can see Detroit from here!
Yeah, I did that, its better, but not fixed. I think I'll Drive it a few days and see if it goes away.
_________________________
-Steve

2006 Audi A6 ~132k miles, stock.
1998 Mercury Grand Marquis LS HPP ~100k miles, slowly acquiring modifications.
1997 Town Car Cartier ~145k miles, Ported Plenum, Gutted Airbox, Contour E-fan Retrofit, Dual exhaust with Magnaflows, cats deleted, MSD Ignition, KYB Gas-A-Justs, P71 front bar, air ride reinstated, Projector retrofit, Caddy 4-note horn retrofit, Wood rim steering wheel retrofit, holistic weight reduction as the parts fall off..
1996 Mercury Grand Marquis GS 117,485mi. R.I.P. 7/14/12 frown

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#2218803 - 01/16/11 11:51 PM Re: Thrermostat changed and now misfireing [Re: BigMerc96]
gord_bolton Offline
Over the Hill

Registered: 05/06/02
Posts: 4691
Loc: Saskatoon, Saskatchewan
Did you spill a little antifreeze in the spark plug well?

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#2218839 - 01/17/11 12:35 AM Re: Thrermostat changed and now misfireing [Re: gord_bolton]
BMFer Offline
I'm your huckleberry
Grand Poobah

Registered: 12/04/05
Posts: 13610
Loc: 30106
You probably killed the #5 coil and maybe #6. If not, you're still gonna need compressed air to get all the water out.
_________________________

'13 Coyote 5.0

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#2218844 - 01/17/11 12:43 AM Re: Thrermostat changed and now misfireing [Re: gord_bolton]
BigMerc96 Offline

I know nothing
Posting Addict

Registered: 06/05/10
Posts: 19868
Loc: I can see Detroit from here!
 Originally Posted By: me
I'm almost 100% sure that some coolant has found a nice warm home in the plug wells and is the cause of the miss.


I'm still sure thats what it is. Either way, I drove it a bit a little while ago, and it didn't miss at all. Maybe If I'm lucky(would be a nice change), the antifreeze evaporated and the problem is gone. I'll keep an eye on it and report back in a few days.

On another note, the new thermostat works great. for the first time this winter, the car is warming up and staying warm like it did before i changed the Intake manifold and thermostat last spring. Wonder if that T-stat was bad out of the box? It seemed fine until it started getting cold outside. Maybe my gas mileage will improve too, 15MPG is really bad for a car with 2.73rar, even in winter.
_________________________
-Steve

2006 Audi A6 ~132k miles, stock.
1998 Mercury Grand Marquis LS HPP ~100k miles, slowly acquiring modifications.
1997 Town Car Cartier ~145k miles, Ported Plenum, Gutted Airbox, Contour E-fan Retrofit, Dual exhaust with Magnaflows, cats deleted, MSD Ignition, KYB Gas-A-Justs, P71 front bar, air ride reinstated, Projector retrofit, Caddy 4-note horn retrofit, Wood rim steering wheel retrofit, holistic weight reduction as the parts fall off..
1996 Mercury Grand Marquis GS 117,485mi. R.I.P. 7/14/12 frown

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#2218884 - 01/17/11 02:49 AM Re: Thrermostat changed and now misfireing [Re: BigMerc96]
CaptainMoustache Offline
Over the Hill

Registered: 12/08/05
Posts: 1139
Loc: Dumont, NJ
I had to deal with this a few days ago in the cold as well, I twirled some shop towels to a point and the repeatedly crammed them down into the plug well. It only got a little bit at a time but you could cram it in there then go inside for 10 mins and let it soak up. I think Q-tips would work better but I didn't have any.

Just a tip if you still have the miss, I ended up having to replace the plug wire to stop the misfire that seemed to come and go as I guess some coolant fouled the wire
_________________________

97CVLX
155,250 miles

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#2219107 - 01/17/11 01:04 PM Re: Thrermostat changed and now misfireing [Re: CaptainMoustache]
BigMerc96 Offline

I know nothing
Posting Addict

Registered: 06/05/10
Posts: 19868
Loc: I can see Detroit from here!
Thanks, I'm hoping it fixed itself. I hope I don't have to change a wire either, I just changed them about 8k miles ago with the top-shelf Autolite ones with the lifetime warranty. I drove it all last winter with the intake leaking coolant, The original plugs and wires were still on the car then, and they looked nasty. I'd guess it had been leaking long before I bought it in August '09, but it never misfired from it.
_________________________
-Steve

2006 Audi A6 ~132k miles, stock.
1998 Mercury Grand Marquis LS HPP ~100k miles, slowly acquiring modifications.
1997 Town Car Cartier ~145k miles, Ported Plenum, Gutted Airbox, Contour E-fan Retrofit, Dual exhaust with Magnaflows, cats deleted, MSD Ignition, KYB Gas-A-Justs, P71 front bar, air ride reinstated, Projector retrofit, Caddy 4-note horn retrofit, Wood rim steering wheel retrofit, holistic weight reduction as the parts fall off..
1996 Mercury Grand Marquis GS 117,485mi. R.I.P. 7/14/12 frown

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#2230740 - 02/02/11 05:34 PM Re: Thrermostat changed and now misfireing [Re: BigMerc96]
BigMerc96 Offline

I know nothing
Posting Addict

Registered: 06/05/10
Posts: 19868
Loc: I can see Detroit from here!
Well, I said I'd update this, so here you go:

It fixed its self! Why cant all problems fix themselves? The last time I felt a misfire was the day of my accident on 1/20/11, its been fine since. I wish I could say the same for my bumper, but all well. \:\)
_________________________
-Steve

2006 Audi A6 ~132k miles, stock.
1998 Mercury Grand Marquis LS HPP ~100k miles, slowly acquiring modifications.
1997 Town Car Cartier ~145k miles, Ported Plenum, Gutted Airbox, Contour E-fan Retrofit, Dual exhaust with Magnaflows, cats deleted, MSD Ignition, KYB Gas-A-Justs, P71 front bar, air ride reinstated, Projector retrofit, Caddy 4-note horn retrofit, Wood rim steering wheel retrofit, holistic weight reduction as the parts fall off..
1996 Mercury Grand Marquis GS 117,485mi. R.I.P. 7/14/12 frown

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