Engine Vibration

[Andy 1958]

1998 toyota corolla 4efe (1332cc) engine, manual transmission, vibrates at idle (600rpm) 35000 miles . This vibration can be noticed inside the car, is this normal

[Hadrian1]

Check engine. mounts.

[Andy 1958]

The engine mounts are in good condition, it only vibrates a small amount at very low idle speed. 

[oldcodger]

Ours also runs a bit like that at tickover, which is around 650 rpm . From previous similar posts here, seems a normal thing for our older Corollas

Some suggest cleaning  the throttle body/ butterfly valve which we tried one time and it seemed to make a little difference, but not much.

[Andy 1958]

The engine mounts are in good condition, it only vibrates a small amount at very low idle speed. 

OK, thanks for the information,I think it's down to the very low ldle speed, if you increase the speed very slightly with the accelerator pedal it smoothes out. 

[oldcodger]

If yours is a cable operated carb then you should be able to adjust the cable stop to hold the tickover at slightly higher revs.

 

[Andy 1958]

It is a cable operated fuel injection system. 

[Corolla Mike.]

As above, clean the throttle body/butterfly and should be adjuster screw probably set it round 850-900 rpm. 

[Corolla Mike.]

May get better assistance  on a Starlet forum, guess that engine common in Starlets?

[oldcodger]

Do not know what type of cable adjustment you have, various images on the web,  but this video shows how to do it on some models,  if you can follow Peters broken English.

https://www.youtube.com/watch?v=wq7dSgWfEzY

 

[Andy 1958]

I have seen this video before, this is a slightly different engine to mine but this is not the right way to adjust the idle. I found this video which explains how the idle valve works and how you can adjust it from the original factory setting. 

https://youtu.be/Z_TmW0GCRpI?si=QlLYwGqPLxi6lWQu

 

[Roker]

I'm only guessing but if you have a ECU the tickover should be adjusted via this

[hubrad]

A common cause of idling just a bit rough is one cylinder misfiring, whether spark or fuel delivery. Worth checking the spark plugs, cables and air filters and running fuel system cleaner through for a while to see if it helps, possibly even get the injector(s) checked and cleaned.

[hubrad]

On 6/9/2024 at 10:31 AM, oldcodger said:

Do not know what type of cable adjustment you have, various images on the web,  but this video shows how to do it on some models,  if you can follow Peters broken English.

https://www.youtube.com/watch?v=wq7dSgWfEzY

 

I've found Peter Finn to be very helpful on various aspects of Corolla fixing, love his calm approach! I subscribed to his YT channel a few years back.