Cruise Surging

[1990 LSC]

RECENTLY PURCHASED 1990LSC LE, WHEN CRUISE IS SET VEHICLE IS SURGING, REVS UP/THEN DOWN. ANY ONE HEARD OF THIS??

 

[torquemonkey]

Is the cruise control Vacuum related on VIIs?

 

[OldSchool1]

RECENTLY PURCHASED 1990LSC LE, WHEN CRUISE IS SET VEHICLE IS SURGING, REVS UP/THEN DOWN. ANY ONE HEARD OF THIS??

Yes, I have.
Your vacuum and fuel systems have to be optimum to enjoy the benefits of a steady cruise control system.

What have you done to the car so far?

 

[OldSchool1]

Is the cruise control Vacuum related on VIIs?

Yup.

 

[1990 LSC]

i had a ses light on, scan and replaced tps, light is out ,cold start problem is fixed, (rough idle/stall) havent tried cruise yet, dont know yet if this may correct cruise?

 

[NYC LS8]

A bad TPS does funky things. It quite possibly could fix that problem of yours.

 

[1990 LSC]

yes, tps corrected cruise control