18GVR4
Well-known member
I bought a non running GGSX. Swapped the ECU and CAS and it fired up. Drove it around and it runs pretty good. On start up the idle is 2,500. after warm up, it drops down to 1,500. Biss screw all the way in and it will not drop any lower. I blocked off the EGR, checked all the vacuum lines. still 1,500. could the timing be off, or a leak somewhere? Thanks in advance.