06-08-2012, 02:47 PM
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#1 |
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Stock
Join Date: Jun 2012
Location: Maryland
Posts: 6
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Vibration at idle
Mark IV all-stock owner ('98), auto, have significant vibration at idle, worse at stop with foot on brake, goes away @~ 1100 RPM and otherwise engine purrs like a kitten (ok, maybe a mean one). Been to 3 different mechanics (incl Toyota dealership) and no one can fix it. FYI- I'm not a sophisticated car guy, but that's probably obvious!
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06-08-2012, 05:33 PM
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#2 | |
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Supra Owner
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
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Quote:
2) Without being there in-person to troubleshoot, I'd suggest one of the likely culprits is a misfire...possibly due to an ignition issue. How old are your sparkplugs? Do you know what they're made of (copper, platinum, iridium, etc.)? How long since your last tune-up (and plug change)? How many miles on the car (and therefore the ignition system, coil(s), ignitor, etc.)? 3) Get/borrow/use a compression tester and post (or PM) the individual results for each cylinder. http://www.mkiv.com/manual/manualtt/...eck/index.html
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+ Displacement is no replacement for boost. Life begins at 30psi. NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners. Last edited by pwpanas; 06-08-2012 at 05:36 PM. |
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06-08-2012, 11:10 PM
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#3 |
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Stock
Join Date: Jun 2012
Location: Maryland
Posts: 6
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Thansk for the comments
No, not misfire. Has been vibrating for more than 3 years now and have had it serviced regularly incl tuneups/spark plugs etc. 154K miles now.
Don't even know what TT or N/A means (I said I was no car guy). I can have compression checked. I had one mechanic this week suggest drive shaft bearings (?) which is what led me to a forum for other opinions before I blow $ on that possible fix. One mechanic replaced harmonic balancer- no resolution to problem. So bad sometimes I have to shift into neutral at stops because it will drive my ears crazy. Damn... I love my Supra but it's gonna vibrate itself to death. |
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06-09-2012, 01:52 PM
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#4 | |
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Supra Owner
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
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Quote:
N/A = Normally Aspirated (non-turbo) If it vibrates at idle (while parked), then it is NOT your driveshaft bearings. Let me know the results of the compression test.
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+ Displacement is no replacement for boost. Life begins at 30psi. NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners. |
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06-09-2012, 02:08 PM
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#5 |
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Stock
Join Date: Jun 2012
Location: Maryland
Posts: 6
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TT, N/A LMAO DUH! It's N/A. Will do on the compression test. Thanks again. -J
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06-09-2012, 02:49 PM
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#6 | |
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Supra Owner
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
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Quote:
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+ Displacement is no replacement for boost. Life begins at 30psi. NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners. |
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06-10-2012, 12:35 PM
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#7 |
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Stock
Join Date: Jun 2012
Location: Maryland
Posts: 6
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Never any racing, all original- no modifications, mostly premium but occasionally mid-grade.
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06-10-2012, 06:15 PM
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#8 | |
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Supra Owner
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
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Quote:
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+ Displacement is no replacement for boost. Life begins at 30psi. NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners. |
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06-11-2012, 10:14 AM
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#9 | |
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3" Exhaust
Join Date: Apr 2011
Location: redhill surrey uk
Posts: 142
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vibration at idle
Quote:
Last edited by interested!; 06-11-2012 at 10:33 AM. Reason: extra info / question ? |
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06-11-2012, 11:55 AM
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#10 |
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Stock
Join Date: Jun 2012
Location: Maryland
Posts: 6
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2nd owner- bought it in 2000 w/ ~ 20K miles.
Yes, vibration reduces substantially when I shift to neutral. Have never checked transmission fluid though I would have expected that mechanics have. "Tooth on starter ring gear on flywheel"... all Greek to me! I guess I can suggest that to a mechanic? It occurs to me that sometimes vibration seems to worsen when I go from low gas tank level to a fill-up. Then again maybe I'm dreaming. |
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