1) First, relocate the the intake air temperature sensor to the air clearer duct. The heat load where it is located on a stock C4 gives the ECM (Electronic Control Module) a false reading and the ECM responds by cutting back on the fuel/air mixture to a leaner value than is actually required. Mid-America sells […] More »

A very common problem with the C4 sport seat is the failure of the pump that inflates the lumbar bladders internal to the back of the seat. The most prevalent failure is not the pump assembly, but simply the diaphragm within the pump sub-assembly. To gain access to the pump, look under the front of […] More »

This modification was performed on an 87 Vette with approx. 100K on the odometer, a gutted MAF, a K & N air filter, Jacobs 8.5mm plugs wires and Delco sparks that are 2 heat ranges hotter than stock. I tried this modification and my fuel pressure went from 30# to 40# with only this fifteen […] More »

This method worked for me on my PKE-equipped \’93 Corvette. Another guy and I shook the car so much the keys slid off the dash and onto the passenger floor! Anyway, here\’s how to save a call to the locksmith… What you\’ll need: 10-ga. wire, about 3\’ long (a coathanger might work, but generally the […] More »

… Here are the sure fail tests for the fuel system to save you time and money.. Take a fuel pressure gauge attach it to the schraeder valve.. turn the key on and off a few time to build up the pressure in the system… If you are having starting trouble the pressure will probably […] More »

Headlight Motor Repair Procedure The following instructions detail the repairing of the headlight motors for the C4, using Tools Needed: 1/4\” drive 10mm socket 1/4\” drive 13mm socket 1/4\” drive Torx #30 Nutdriver with 1/4\” socket Hammer Pliers Small punch Awl or sharp nail Truarc snap ring pliers Materials Needed: WD-40 Hand Cleaner Grease Parts […] More »

Enthusiasts that have installed long tube headers may find that their engines are running in opened loop because the O2 sensor is not heated to 600 degrees. This is especially true if the O2 bung is relocated to the collector. In the case of the Hooker 2149 header, the bung is located on the #7 […] More »