when i start my car it. runs good. for. about 30 mins then it will start jerking back and forth just going 5mph

What is your question?

l sparrking.loud sound when..i. push. on. the .gas pedal ! the. problems start after. the. engine. warm up. for. about. 30 mins

What makes this problem better or worse?

it gets worse once the.car warms up.

How long has your 1995 Nissan Quest had this problem?

about 2 weeks