Subject: problem on my rpm timing,was throttle body?
Question:

problem on my rpm timing,was throttle body?
mine 4g93 rpm timing , without air-cond was stated around 1k rpm, no problem and unshaking at all.
but when i switch on my air-cond, rpm timing drop to 200-300 and whole engine, steering shaking seriously.
can i ask why my timing suddenly drop seriously after i switch on my air cond? was it throttle body problems or others ?

thank you. from keng.
Answer: Keng,
Your problem might be caused by a malfunctioning throttle body. Check all air intake components. This includes all hoses and the air filter.
Good luck!