Verify your Bosch Motronic case has the code: 021906259N /* N being the important part */ This should be the case for all '98 VR6s. If it is not "N"... then tell us what it is. If it is "N"... then talk to Todd at Air & Water Enterprises (888)565-2257 and order the Garrett V.11N chip. It must be *N*. -Chuck Simpson...