when my car is in park or netrual it is fine but when i but it in gear it vibrates something awful i was wondering if the torque converter could be locking up at low rpms just wondering any info would help
no mods stock 305 h code

 

It would seem that if the TC was locking up then it would cut off instead of idling.

Does it shake badly all the time? Or just when it's idling? If it's just when it's idling it may be the IAC.. it's worth cleaning/checking/setting anyways, it made my car idle a lot better. There's a technical article on how to do it; it's not that hard.

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89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else

 

haveing a brain lock what is IAC

 

the iac is the idle air control

does your car only do it when idleing, or does it do it when driving too?

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My `91 Z28 Convertible
<a href="http://www.marks-mall.com">Northern Kentucky Fbodies</a>

[This message has been edited by Dan91Z (edited March 02, 2001).]

 

it only does it at idle and low rpms

 

Sounds like the IAC then. The IAC's really easy to set, it just takes a torx bit and a paperclip. If it's never been set before you may have to use a punch or a screwdriver to punch out a cap meant to discourage adjustments. You can go ahead and set the TPS while you're at it, but that requires a few more tools. Either way, there's a good technical article on how to do both.

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89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else