Changed spark plugs Now ENGINE KNOCK - - Infiniti G35 & G37 Forum Discussion | rupromenergo.ru
Show Your Support Become A Premier Member

    > >
  • Reload this Page >
    • Changed spark plugs Now ENGINE KNOCK


Changed spark plugs Now ENGINE KNOCK

Thread Tools Rate Thread
Old 10-09-2010, 08:56 PM
Registered User
Thread Starter
Join Date: Oct 2010
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Changed spark plugs Now ENGINE KNOCK

Guys,
I'm really desperate here. I changed the spark plugs on my 2003 G35 and now I hear a knocking noise from the engine. I'm not 100% sure if it is actually engine "knock" but it sounds like it.

The plugs the car has had are:
NGK PLFR5A

The plugs I was replacing them with are:
NGK LFR54GP

These plugs should work fine from what I read on google. I purchased them from Sparkplugs.com

I'm scared to drive the car with this problem to see if it goes away. There is a bit of a vibration when the car idles or when i let off the throttle from lightly revving it. No vibration while revving.

I was worried that my coil packs were hooked up wrong, but I can't find a diagram to ensure this. I'm pretty confident the coil packs were reinstalled correctly.

Any help. please!~
Old 10-10-2010, 02:09 PM
Registered User
Thread Starter
Join Date: Oct 2010
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Does no one know?
Old 10-10-2010, 02:43 PM
thescreensavers's Avatar
Mr.202?
iTrader: (10)
Join Date: Apr 2009
location: Miami,FL
Posts: 9,751
Thanked 202 Times in 160 Posts
"NGK LFR54GP" If you google that nothing comes up, So I dont think anyone can help you.
Old 10-10-2010, 03:06 PM
Registered User
iTrader: (5)
Join Date: Mar 2010
location: Bridgeport CT
Posts: 298
Thanked 16 Times in 7 Posts
If you hooked up the coil pack incorrectly, you would be scared to lightly rev it. Still check. If I remember correctly, the drivers side bank is easy to make that kind of mistake on. If the plugs are correct for the application (which I didnt verify), I would start by verifying plug gap even though they come pre-gapped.
Old 10-10-2010, 03:15 PM
Registered User
iTrader: (26)
Join Date: Sep 2009
location: ATL hoe
Posts: 3,082
Thanked 20 Times in 18 Posts
make sure the coil connectors are going to the correct coils for starters. and why didnt you just go with the oem plugs? if you buy anything other than oem, check and set the gaps.
Old 10-10-2010, 05:38 PM
Registered User
iTrader: (5)
Join Date: Mar 2010
location: Bridgeport CT
Posts: 298
Thanked 16 Times in 7 Posts
I verified the plugs you have are the correct app, others are having trouble finding it in google because you supplied the wrong p/n "NGK LFR54GP"--- replace the 4 with an A------ngk lfr5agp
Old 10-10-2010, 09:06 PM
Registered User
Thread Starter
Join Date: Oct 2010
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
gentlemen,
I just watched this video:

which clearly shows the coil pack plugs and where they go. So now i know that everything is connected correctly. There is still a vibration but I am going to drive the car and see what happens. Maybe something else has gone wrong...
Old 10-11-2010, 12:07 PM
Registered User
Thread Starter
Join Date: Oct 2010
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Problem solved.
I don't know what we did exactly to fix this but as a last attempt here is what he tried.

We torqued the spark plugs to 18ft.lbs - they were all pretty much there except the number 6 cylinder was a little loose. Not sure if this was the problem or not.

Then, myself and two other guys watch the video I posted to try and confirm the wiring connections for the coil packs.

The long wiring that is kind of in the middle of the looms goes to the Middle cylinder on that bank(cylinder 4).

Car fired right up with no vibration. Idle was high, around 1,000 but I think a little bit of driver will solve that
Old 10-11-2010, 11:28 PM
Registered User
Join Date: Jun 2010
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
a spark plug was a little loose? Yup, think you found the problem.
Old 10-12-2010, 12:01 PM
Registered User
Thread Starter
Join Date: Oct 2010
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Maudlin View Post
a spark plug was a little loose? Yup, think you found the problem.
I don't know if I would agree to that compeltely but it's definitely a big possibility.

Related Topics
Thread Thread Starter Forum Replies Last Post
New to the G family, I Need help Terry_G35 New Members Check In 14 08-20-2015 10:56 PM
Valve cover change - Oil on spark plug - compilation thread yassy G35 Sedan V35 2003-06 3 08-09-2015 08:31 PM
FS: 05 G35X sedan $6700 wuppiedog G35 Cars 1 08-07-2015 12:16 PM
06 6mt coupe misfiring 😓 ghost_g35 Engine, Drivetrain & Forced-Induction 2 08-07-2015 11:31 AM
2003 G coupe. Need help guys please Terry_G35 G35 Coupe V35 2003 - 07 8 08-04-2015 03:38 PM


Tags
changed, correctly, engine, forums, g35, knock, knocking, knocks, lfr5agp, plug, plugs, plungs, sound, spark, spatk
Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:09 AM.


Copyright ©2002 - 2017, rupromenergo.ru All Rights Reserved. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in:

Related pages


piggyback ecuobd code p0455how to replace serpentine belt tensionerr1conceptsosram hb2 dot 9003 lturbo plus superchargerviper alarm 5706how much does a window regulator costrockford fosgate p200-2 amplifiercrankshaft pulley removerinfiniti g35 rotorsdifference between plenum and non plenum2004 infiniti fx35 dashboard recallarmor all glass cleanerdiy thermostat replacementtransmission solenoid valver35 specscost of replacing clutchpermaplate paintguard renewerplasti dip spray paint rimsangel eye head lightsthe370z forumbad strut noisetrue dual exhaustoptimum spray waxnissan motor oil recommendationsoptimum no rinse canadahuper optiksvinyl tail light tintcar shakes at 55 mphblue flame tires raleigh nchow much does a tyre weighkensun hid 6000kwhat does tbs meanrsx wheel bolt patternmeisterschaft exhaust 370zcastrol 0w40 european formulawalker exhaust flangeg35 camshaft position sensorrotorworks garden groveauto zone car waxyellow top optima autozonebuffing out scratches on car costcar makes knocking noise when acceleratingunichip reviewinfiniti g35 picstint ticket nynorthern radiators eppingenjuku racing couponlocking lug nuts lost keyalpine mrx m110 specsg35 turboneticspbm suspensioncig lightertiming chain tensioner leakingyakima king joe 2 bike racksunline racingcamber wear tiresnos octane boosterg35 chargespeedeurotek rimste37 concaverb25 engine weightp0455 evap system large leaksupercharged g35 sedancerritos infinitinfiniti g35 cat back exhaust2011 maxima service engine soon350z stock horsepowerfederal ss 595 reviewbuild a infinitig35 stockinfiniti willowdalemount balance and alignment costresurface front rotorsfuel pressure tester autozonecostco nitrogenkyb strut plus review