Recently posted on IATN:
This is a post from IATN, I have already seen a couple of these myself.
Imagine how much this 130k mile Camry cost to fix!!! Ah, if only it had a simple
belt
Rating: Status: Closed w/FixComments: No Comments
Replies: 8 (
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From: James DeMoss
Date: Oct 11, 2005 6:06 AM
REPLY: Click here to reply to this FIX!2002 Toyota Camry Engine: 2.4 L / 144 CID / 4 cyl / Gas / DOHCFuel: Fuel InjectionIgnition: DistributorlessTrans: 4-speed Automatic Transaxle (Electronic)Mileage: 132,364 miVIN: 4T1BE32K12Misc Data: 16 ValveAffected Item: EngineCondition: engine vibration at idleMore Info: Test results included below
_____________________ ORIGINAL MESSAGE _____________________
The customer has brought this in to our shop. They havealready replaced the spark plugs. The complaint was a roughidle and that the "Check Engine" light is on.When we scanned the system we found a code P1300 - erraticcrank signal but, we do not believe that has anything to dowith the vibration at idle. A compression test has revealednothing, inspection of the harmonic balancer shows it to beOK... we even checked to see if the timing chain has jumpedtime. i would like to also add that the mounts are all goodand that this is clearly a vibration issue, mechanical innature.We have searched for TSBs, iATN database, Alldata, Mitchell,and even identifix to no reward.So if any of you Toyota Gurus have any suggestions orcomments, we'd appreciate it.Thanks
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compression tests - Good - All even at 125psi power balancetests - Good - All cylinders are equal
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UPDATE: The engine vibration MAY be due to stretched chains(timing chain & balance shaft). We have examined just howthis is put together and believe the the stretched chainscould be a significant contribution to the engine vibration atidle. If anyone could confirm these thoughts from recentexperiance, great. We will let the group know how this turnsout Thanks! ;-)
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The tining chain wear was extensive enough to change the valvetiming at idle. It had not jumped teeth, nor effected thebalance shaft system which is in no direct contact other thangear to gear mesh with the crankshft in side the oil pan. Thenew chain was 1 and 1/2' shorter that the old. Remember this adual overhead cam and vsariable cam timing. Everything shouldbe smack dead on. Most responses leaned towards mounts but not a single mountwas replaces even they are 130000 miles old. This will be a good one in the archives and thanks to all thatsent thier comments. -JamesJames DeMossTechnician/Educator/InstructorC.A.R.SHouston, Texas, USAiATN Technician Sponsor (Inactive)
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