idle rumble

by **hari-bhari** » Wed Jul 23, 2003 2:59 pm

hey guys, ive got another question for you. when i bought the car, i remember it was so quiet and just purred beautifully. nowadays, its still a smooth ride and all, but i think the idle is rougher than it used to be, especially on startup, and when i look ak the tach (just stopped at a traffic light, with the engine all warmed up already), i notice that the tachometer wavers ever so slightly. but i can feel the vibrations mildly through the wheel and stuff, and this is all when the a/c is off, when i turn it on, thats a whole different story. but anyways, i was curious what are some of the causes and fixes for a rough idle. ive gotten the transmission oil changed, changed the coolant myself, checked power steering fluid and it looks good, engine oil just changed, im really due for a rotate and balance tho (that shouldnt matter when im stopped however), and im planning on changing out the spark plugs this week (they just came in yesterday). what else is there that i could do to get back to a smoother idle state? any ideas? thanks

by **TadS** » Wed Jul 23, 2003 7:55 pm

O2 Sensors. Mine are starting to get ugly, so I figure I'll see a CEL by winter. It could also be a vacuum, air filter, or fuel system problem. I would look into the O2, as my Celica with a 3S motor used to eat them (about every 1.5 years), and when they went bad the idle got funky.

Website · by **Turbosolara** » Wed Jul 23, 2003 9:52 pm

i thought its normal as long as your RPM dont swim up and down more then 100rpm

by **TadS** » Wed Jul 23, 2003 10:01 pm

That assessment sounds about right Ultra. I guess "rumble" is a little vague. My buddy has a Charger that rumbles when it idles too LOL. I just popped the list for "Rough Idle" from my Haynes Manual. I figured that would be a good place to start

. Personally, I would just do my basic maintenance (tune-ups and whatnot), drive properly, and then take it into the dealer when the CEL pops on

.

by **hari-bhari** » Thu Jul 24, 2003 4:06 am

so its ok to drive with the o2 sensors getting old? as long as it doesnt damage my engine or anything? hopefully ill have the car sold before i have to deal with any of this, but i gotta make sure theres nothing wrong when i sell it otherwise buyers wont pay as much

by **ICUFG** » Thu Jul 24, 2003 5:17 am

Hate to say this but it could be engine geling, sludge is a big issue Toyota can check this out for you. If it doesn't get any better I would take it to Toyota I think its like an 8 year warranty on engine geling correct me if im wrong but I think its 8 years.

by **Fletch** » Thu Jul 24, 2003 5:20 am

Isn't the after-cat O2 sensor over $100 dollars or something riduculous like that?

by **Guest** » Thu Jul 24, 2003 6:13 am

ICUFG wrote:Hate to say this but it could be engine geling, sludge is a big issue Toyota can check this out for you. If it doesn't get any better I would take it to Toyota I think its like an 8 year warranty on engine geling correct me if im wrong but I think its 8 years.

ickk....well i can get it checked out for free at least, but i think sludging would sieze up the engine, and if its less serious, just decrease performance.....i dont know if it would cause a rough idle

by **hari-bhari** » Thu Jul 24, 2003 6:14 am

by **TadS** » Thu Jul 24, 2003 6:30 am

ICUFG wrote:Hate to say this but it could be engine gelling, sludge is a big issue Toyota can check this out for you. If it doesn't get any better I would take it to Toyota I think its like an 8 year warranty on engine gelling correct me if I’m wrong but I think its 8 years.

I thought if you kept the oil clean you where ok on this one? Maybe, I should have them check mine out too?

Fletch wrote:
Isn't the after-cat O2 sensor over $100 dollars or something ridiculous like that?

Not sure on this car. They cost more that $200 on my Celica, but it was a 3S-GELC. That motor seemed to make everything more expensive

.

by **Jai_Jai_Binks** » Thu Jul 24, 2003 6:45 am

Hari: its normal for 5sfe to do what you just said...I have both a 1mz and a 5sfe, the imz's are more smoother and quiter in the long run....So if your referring to the slight vibration in the steering and slight rough idle...on a 5sfe its OK! (i know cus even my celica is 5sfe) as much as i like that engine...it was designed to be RELIABLE. Unless you have rough rough rpm jumps, then you might have problem with your ideling (sp??).

by **onefiend** » Thu Jul 24, 2003 8:16 am

ICUFG wrote:Hate to say this but it could be engine geling, sludge is a big issue Toyota can check this out for you. If it doesn't get any better I would take it to Toyota I think its like an 8 year warranty on engine geling correct me if im wrong but I think its 8 years.

There was another post on here about gelling. Basically I remember that if you get your regular oil change service at every 3,000 miles gelling would not occur.

by **Jai_Jai_Binks** » Thu Jul 24, 2003 9:06 am

I think the sludge was an issue for the 1mz engine...(i received a letter from toyota for that)...but not on my 5sfe. Keeping in mind hari's got an i4, i think engine sludge should be his last bet....

by **ICUFG** » Thu Jul 24, 2003 10:22 am

jhbhatia wrote:I think the sludge was an issue for the 1mz engine...(i received a letter from toyota for that)...but not on my 5sfe. Keeping in mind hari's got an i4, i think engine sludge should be his last bet....

Yeah it was primarly on 1MZ-FE, but I also have a 3S-FE with 130K and I can notice the build up of sludge underneath the oil cap, and it has never been over 5K on oil changes. Its just a thought on the idle problem, but it could be coil pack, plugs, wires, crank sensor, cam sensor, water in fuel, fuel filter, PCV valve, air filter, TPS, EGR, and so on. GOOD LUCK!

Website · by **DavPak** » Thu Jul 24, 2003 11:08 am

gelling was a problem on both the 5s and 1mz, but moreso on the 1mz.

for the rough idle, i would look into the air filter and fuel filter.

idle rumble

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