1991 Toyota MR2 Need answers

1991 TOYOTA MR2
4 CYL • RWD • MANUAL
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PACO3190
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My friend has a 91 Toyota mr2 that has a idle problem and jerks a lil while shifting. At idle it sounds normal then bogs down for just a second or 2. While shifting it seems as if it's slightly loosing power then regaining.what could this be?
May 19, 2015 at 3:48 PM
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JACOBANDNICKOLAS
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Check for vacuum leaks on the engine and check the idle air control valve (IAC). The IAC is responsible for maintaining the engine idle speed.
May 20, 2015 at 10:55 AM