× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

U1027 Diagnostic Trouble Code Discussion for July 2004

Engine RPM Missing/Invalid

Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC U1027
Help Request Posted
1999 Ford F-150 Lariat 5.4L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1FTRX17L4X
U1027: Engine RPM Missing/Invalid. ... there has run into this before. This '99 F150 will sometimes rev up the RPMs on it's own. Sometimes it will die at idle and sometimes it has a hesitation when leaving a stop. We replaced the PCM about 6 months ago because of code P1636 (KAM failure). At th...
July 01, 2004