I wanted to start this discussion because there is a known phenomenon out there causing tunes to drop from the QuarterHorse. Its called EMI..electromagnetic interference. Its been an ongoing issue of mine and other racers (dale mcpeters) that I have been chasing to find a fix for. The problem exists in my race car where the entire engine and electrical harness is inside the car behind the dashboard. The ignition box is also under the passenger seat. Add aluminum race seats and a 25.1c chromoly cage and chassis and all hell breaks loose for some reason...lol. What happens is the tune gets dropped, lost, corrupted or something randomly for no appearant reason. The immediate effects are the car not idleing and severly loading up with fuel and just stalling. Re-writing the tune to the QH is the instant cure but who knows for how long. This emi also effects the datalogging. When in an active and running datalogging session the logger will stop the minute any power is made with the car. Obviously this requires carrying a laptop everywhere and is quite inconvenient. I have tried adding numerous ferrite beads to the usb cable and even removing them. The grounds in the car are way more than adequate. I dont know what else to do but maybe isolate the ecm/qh somehow from the wiring and electronics from the car. If anyone is thinking its the ignition box in the car, I have the ignitiion box under the driver seat in my street car and I have no problems. So I would like to see if there is a way to overcome this emi issue and maybe figure out whats actually causing it so maybe I can isolate the problem and help others who are experiencing this issue.
Electromagnetic interference (or EMI, also called radio frequency interference or RFI when in high frequency or radio frequency) is disturbance that affects an electrical circuit due to either electromagnetic induction or electromagnetic radiation emitted from an external source. The disturbance may interrupt, obstruct, or otherwise degrade or limit the effective performance of the circuit. These effects can range from a simple degradation of data to a total loss of data. The source may be any object, artificial or natural, that carries rapidly changing electrical currents, such as an electrical circuit, the Sun or the Northern Lights.
EMI can be intentionally used for radio jamming, as in some forms of electronic warfare, or can occur unintentionally, as a result of spurious emissions for example through intermodulation products, and the like. It frequently affects the reception of AM radio in urban areas. It can also affect cell phone, FM radio and television reception, although to a lesser extent.
1989 GT - 25th Anniversary 5.0, Vortech S-Trim, TFS Trackheat Heads & Intake, TFS Stage 1 Cam, FRPP 1.6 RR, 75mm TB, Pro-M 80mm, Anderson Power Pipe, FRPP 42#s, GS-340/255 lph pump, Anderson 1-3/4 shorties, 3" Borla Exhaust, Tremec T-5, 3.73-31 spline, MSD 6AL2, complete-lowered suspension A9L, Moates QH/SL v1.6/1.4, BE, EA, Innovate LC-1/XD-16.
1992 LX - 25.1c Chassis, Vortech Blown Renegade 317, Lentech Trans, TRZ Backhalf,A3M1, Moates QH/SL v1.6/1.4 BE, EA