BIGBrandon2785 Posted November 1, 2012 Report Share Posted November 1, 2012 Now that ive given my 98' STS some time,ive noticed if I jump in my car and take off it acts like it wants to die a stop lights.But when it warms up or driving it runs great??Any ideas?? Link to comment Share on other sites More sharing options...
cdgrinci Posted November 1, 2012 Report Share Posted November 1, 2012 Sight unseen and if no Check engine lights, I would nose around a dirty throttle body or vacuum leaks (hoses/gaskets/etc.) but could be a lot of other things too. Chuck '19 CT6, '04 Bravada........but still lusting for that '69 Z-28 Link to comment Share on other sites More sharing options...
PAUL T Posted November 1, 2012 Report Share Posted November 1, 2012 Check the fuel pressure regulator by pulling the vacuum hose off and turning the key on (engine off) to pressurize the fuel system. If you see gas change the FPR. Check the plug wires too. Link to comment Share on other sites More sharing options...
KHE Posted November 2, 2012 Report Share Posted November 2, 2012 A defective fuel pressure regulator will cause rough hot starts. Are there any trouble codes stored? Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
BIGBrandon2785 Posted November 6, 2012 Author Report Share Posted November 6, 2012 With the same car I have another issue. It has gotten some what cold here,and now when I start the car when its cold outside,it makes a noise inside the car like a power window stuck but its coming from the dash area?? (No "check engine" ,but a check "stability system"...........but that sound aint a compressor) Link to comment Share on other sites More sharing options...
KHE Posted November 6, 2012 Report Share Posted November 6, 2012 The noise from the dash area could be a stuck/stripped duct actuator. Have you checked the fuel pressure? Having the fuel pressure reading while it is attempting to start will rule a lot of things out. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
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