Engine vibrate at low RPM with AC

20

Asked by Mar 23, 2015 at 06:04 AM about the 1993 Toyota Corolla LE

Question type: Maintenance & Repair

My Corolla AE100 has a vibration problem at low RPM. Now its increasing little bit.
Without AC & Neutral its smoothly run but when i turn on the AC engine start to vibrate
a lot. Vibrations occur only the RPM is 900 with AC, but mostly when i am at the
traffic jam in the Drive mode .Once I got up to speed rpm=1000, this problem seemed
to go away.


My car examined by two mechanics that have found nothing wrong, engine mount is
good. One mechanic said it was the timing belt, so I had the timing belt replaced in the
last year, Aug 2014. Original Toyata timing belt. Front & Back Engine mounts replaced
in Dec 2013, but one is Thailnad & other original one. Also AC cooler was replaced in
last year April 2014.

Now the meter is 190,000km.

Last week i show this to my frinds mechanic & he said my car needs to EFI tune-up.
Any idea about this vibration @ the drive mode with AC????

1 Answer

A vibration that occurs only when A/C is on leads me to pulley bearing, and/or an imbalance in the compressor it's self. When you turn A/C on, the idle is supposed to kick up automatically to about 1100, as to run the alternator and water pump a bit faster and maintain cooling, and support additional draw of radiator fan that is also supposed to kick on. And the compressor should cycle, not run continuously...even in hot ambient temperatures. Ok, now even if one of the mounts is Thai manufactured, it may or may not be quality, but probably not but should be fine, just not last as long. I don't know what an "EFI Tune-Up" is, other than running some solvent cleaner through, which personally I don't recommend. I don't know where you are, and the quality of gasoline available, but hopefully it has detergents. Your engine needs them.

5 of 5 people found this helpful.

Your Answer

Add photo

Related Questions

Corolla

Looking for a Used Corolla in your area?

CarGurus has 70,725 nationwide Corolla listings starting at $1,874.

ZIP:

Search Toyota Corolla Questions

Toyota Corolla Experts

#1 Tom Demyan
Tom Demyan
Reputation 2,410
#2 tenspeed
tenspeed
Reputation 1,840
#3 tennisshoes
tennisshoes
Reputation 1,690
View All

Related Models For Sale

Used Toyota Camry
1,104 Great Deals out of 90,761 listings starting at $1,599
Used Honda Civic
814 Great Deals out of 88,107 listings starting at $1,299
Used Honda Accord
948 Great Deals out of 77,739 listings starting at $899
Used Nissan Altima
1,154 Great Deals out of 79,676 listings starting at $500
Used Nissan Sentra
501 Great Deals out of 52,632 listings starting at $2,000
Used Hyundai Elantra
651 Great Deals out of 43,510 listings starting at $1,500
Used Hyundai Sonata
826 Great Deals out of 46,092 listings starting at $1,000

Used Cars For Sale

2017 Toyota Corolla LE For Sale
17,430 listings starting at $14,257
2016 Toyota Corolla LE For Sale
63 Great Deals out of 2,925 listings starting at $9,995
2015 Toyota Corolla LE For Sale
51 Great Deals out of 1,885 listings starting at $8,742
2014 Toyota Corolla LE For Sale
62 Great Deals out of 1,831 listings starting at $8,400
2013 Toyota Corolla LE For Sale
16 Great Deals out of 710 listings starting at $4,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.