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Previous Thread Next Thread Print Thread Rate Thread Knocking getting worse! #752833 09/19/06 09:27 PM Joined: Mar 2001 Posts: 598 Memphis, TN ducktrooper OP Rock Warrior My Trooper with 168K is getting noticeably louder with engine pinging/knocking. I used to be able to alternate 1 out of every 3-4 tankfuls with unleaded plus. Now, if I'm not running unleaded plus, it reverts to pinging. What's the cause of this and what can I do? I regularly change oil, PCV, clean EGR, use Seafoam, etc. Thanks. '99 Trooper, ARBs, 4.77s, ARB bullbar, Warn M8000 w/Amsteel, OME 912s w/2.5" spacers, Rancho 9000xs, K&N/Magnaflow, 33" Kumho MT's, Aisins, boulder bars, Indy 4X brake lines, diff drop, Flexalite Re: Knocking getting worse! [Re: ducktrooper] #752834 09/20/06 01:01 AM Anonymous Unregistered How about a vacuum leak? You mentioned that you use Sea Foam. Do you just put it in the fuel tank or have you run it through the intake? If your combustion chambers are really mucked-up with carbon, maybe running some through the intake would clean more of that stuff. Does your engine burn much oil? This will contribute to carbon deposits in the combustion chambers. How do your spark plugs look? Any signs of running rich? Oil dripping from them? Good luck, Phil Moderated by  4x4Wire, houlster, jezeric, Jim_Paget, strawmyers  Hop To Mitsubishi Forums ------  Mitsubishi 4x4 and SUV Tech  Mitsubishi Diesels  Mitsubishi ArchiveToyota Forums ------  Early Toyota Trucks  Toyota 4Runner, FJ Cruiser &...  T100 & Tundra Forum  Tacoma Forum  Toyota Tech ArchiveJeep Forums ------  Jeep Talk  Jeep TechIsuzu Forums ------  Isuzu 4x4 & SUV Talk  Isuzu 4x4 & SUV Tech  Isuzu DieselsKia Forums ------  Kia Talk  Kia Sportage & Sorento TechOff Topic Chat ------  4x4 Gallery  Off-Topic Chat  Recreational Access & Land ...  Politics4xForums ------  Outdoor Gear  General 4x4 Discussion  Tools and Fabrication  General Communications  Amateur Radio  GPS and MapsParts Bin ------  Private Party - Garage Sale  Private Party - Items wanted  Vendors, Hot Deals, Group Buys4x4Wire Back Yard ------  Suzuki Forum  AZ Crawler Crew  Cal-Nev Crew  General Ford 4x4 & SUV Forum  General Dodge 4x4 & SUV Forum  General Chevy 4x4 & SUV ForumFeedback & Testing ------  Problems, Questions, Suggestions4x4Wire Staff ------  Forum Moderators  Problem Threads Print Thread Switch to Threaded Mode 5 Excellent 4 Good 3 Average 2 Bad 1 Terrible View Profile Private Message Follow User Forum Posts

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