Car jerking when starting from complete stop

[kopial]

Hi there,

Pls help me. I owned a Toyota Corolla EE90 year '89. The problem is my car will jerking when starting from complete stop, especially in the morning. However it will run finely after 5 minutes, or after warming it for few minutes. I already replace the spark plugs and its cables, contact, & vacuum pump. I also changed to thicker oil, 20W50 (genuine Toyota oil).
Pls help me, as I dont know what to do next.

Also, what is the recommended motor oil for old car like this? Previously I use Castrol GTX 15W40 but my friend advised me that the oil is to thin for old car like mine. Is it true?

Thanks

[Pineapple]

Tranny oill need to warm up first.

[karugs]

Check that you installed the spark plugs properly (just to be sure). Sounds like low idle or poor fuel/spark at start up.

[REN69]

15W-40 is too thin??? We use 10W-30 up here in Canada, and 5W-30 in the winter.. I got 5W-30 in my 89 AE92, warms up faster in cold temperatures. (Like -20C right now)

[Ghost]

check your ignition cables, cap, spark plugs...........Oil wise i have a 2000 and they call for 5W30, probably to thin for your year.....shoudn't 10W30 be fine though?