1993 ty running high idle check engine light and hesitation/breaking up when beginning to build boost?

[ChrisM]

Any ideas? I'm looking to purchase this ty and want ideas on what to look for
Possibly map sensor?

 

[QWERTYphoon]

Scan tool! What code?

 

[ChrisM]

Haven't seen the truck yet going tonight

 

[Timbo]

Vacuum leak would be my first instinct.

 

[powercat6]

https://howtune.com/articles/362-access-the-trouble-codes-on-a-91-93-gmc-syclone-typhoon

 

[graham1524]

What number syclone?

 

[ChrisM]

What number syclone?

The syclone in my profile is long gone sold in 2010 it was #334
I'm looking to purchase a typhoon with these issues I posted about

 

[Sy2622]

There is a pretty big list that it could be. If you can use a scan tool that has data logger you could trim the list down on iac counts ect.
Check and see if running a different chip, throttle body, fuel pump and the last time the vac lines, plugs and cap/rotor have been changed.