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2 different kinds spark plugs in engine. Bad? #1464745 12/19/05 06:51 PM
Joined: Feb 2004 Posts: 230 Falls Church, Virginia S Silversvts OP CEG\'er
OP Silversvts CEG\'er S Joined: Feb 2004 Posts: 230 Falls Church, Virginia	I took my car to the dealer and they installed a motorcraft spark plug into only one of the cylinders. I have the autolite double plats in the other 5 cylinders. My car now bucks in third gear and I don't know if one different spark plug could cause this or not. Also they changed the fuel pump, fuel filter, and an o2 sensor. Do you guys think its the spark plug or did they just not connect something right. My car wasn't bucking before I took it in. Thanks "Why do we drive on parkways and park on driveways?"

Re: 2 different kinds spark plugs in engine. Bad? #1464746 12/19/05 07:19 PM
Joined: Oct 2000 Posts: 4,149 on the rolling plains of Dixie B bigMoneyRacing_dup1 Hard-core CEG'er
bigMoneyRacing_dup1 Hard-core CEG'er B Joined: Oct 2000 Posts: 4,149 on the rolling plains of Dixie	The engine runs at all rpms regardless of the gear; what makes 3rd so special to cause a miss? You've got a problem somewhere else. -- 1999 SVT #220 -- In retrospect, it was all downhill from here. RIP, CEG.

Re: 2 different kinds spark plugs in engine. Bad? #1464747 12/19/05 08:39 PM
Joined: Oct 2004 Posts: 1,456 F FavoriteMystaque Hard-core CEG\'er
FavoriteMystaque Hard-core CEG\'er F Joined: Oct 2004 Posts: 1,456	Check the wire is snapped onto the plug OK, Scan for codes. I have Motorcraft and Autolites both, because of a misfire problem (carbon tracks). They are equal if double platinums. You may have the same problem, see this: plugs Mine tended to misfire in 4th gear 40 MPH 2200 rpm, give it some gas, not floored.

Re: 2 different kinds spark plugs in engine. Bad? #1464748 12/19/05 08:46 PM
Joined: Jun 2004 Posts: 6 J jtjhack Newbie
jtjhack Newbie J Joined: Jun 2004 Posts: 6	I also have bucking in 3rd gear(only). It started right after they changed my fuel pump. 2000 SVT

Re: 2 different kinds spark plugs in engine. Bad? #1464749 12/19/05 08:59 PM
Joined: Feb 2004 Posts: 230 Falls Church, Virginia S Silversvts OP CEG\'er
OP Silversvts CEG\'er S Joined: Feb 2004 Posts: 230 Falls Church, Virginia	Originally posted by jtjhack: I also have bucking in 3rd gear(only). It started right after they changed my fuel pump. 2000 SVT Is it a slight bucking and how long ago did you change your fuel pump? "Why do we drive on parkways and park on driveways?"

Re: 2 different kinds spark plugs in engine. Bad? #1464750 12/20/05 02:59 PM
Joined: Jun 2004 Posts: 6 J jtjhack Newbie
jtjhack Newbie J Joined: Jun 2004 Posts: 6	It is a slight bucking that I can not duplicate in any other gear except 3rd. It has been doing it for about 6 months. The car runs fine except for this.

Re: 2 different kinds spark plugs in engine. Bad? #1464751 12/20/05 03:59 PM
Joined: Mar 2003 Posts: 7,117 West Palm Beach, FL - Going to... T TourDeForce Hard-core CEG'er
TourDeForce Hard-core CEG'er T Joined: Mar 2003 Posts: 7,117 West Palm Beach, FL - Going to...	Check your plug wire routing. Must be that jumbly-wumbly thing happening again.

Re: 2 different kinds spark plugs in engine. Bad? #1464752 12/21/05 11:24 AM
Joined: Jun 2005 Posts: 5,345 Virginia, USA T Tony2005 Addicted CEG\'er
Tony2005 Addicted CEG\'er T Joined: Jun 2005 Posts: 5,345 Virginia, USA	Originally posted by TourDeForce: Check your plug wire routing. and make sure plug boot is seated properly. "Always do the cheap and easy ones first." 1996 V6 ATX 96K miles

Re: 2 different kinds spark plugs in engine. Bad? #1464753 12/21/05 01:46 PM
Joined: Oct 2000 Posts: 6,760 On the short bus R RTStabler51_dup1 Hard-core CEG'er
RTStabler51_dup1 Hard-core CEG'er R Joined: Oct 2000 Posts: 6,760 On the short bus	Why did they change the fuel pump and O2s? And the spark plug thing is a moot point really. Autolites are Motorcraft, and Motorcraft are Autolites... *Ryan* Trollin!

Re: 2 different kinds spark plugs in engine. Bad? #1464754 12/21/05 08:25 PM
Joined: Feb 2004 Posts: 230 Falls Church, Virginia S Silversvts OP CEG\'er
OP Silversvts CEG\'er S Joined: Feb 2004 Posts: 230 Falls Church, Virginia	Originally posted by RTStabler51: Why did they change the fuel pump and O2s? And the spark plug thing is a moot point really. Autolites are Motorcraft, and Motorcraft are Autolites... The fuel pump was going bad and the stealership told me that one of the o2 sensors was bad. Does it matter that the spark plug that they put in was platinum and the others are double platinum? "Why do we drive on parkways and park on driveways?"

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