I have an 88 GT 5.0 car stock long block with explorer intake long tubes no major mods, the other day I was driving the car on the freeway and it started to surge really bad, tach was going crazy dropped to 0 with car still running, it has plenty of gas in in and has had no major or even minor changes for that matter in the last 8 months and car has been great till now, eec relay was fine cleaned the ground by the ecu but still did it after that for the first min of driving again then drove 15 miles home didnt do it again, any idea whats goin on here?
if any other factors or info is needed feel free to ask
Today
Took the TFI module to napa and they tested it for me came up bad said replace I saw it myself, so replaced the TFI module fired up the car let it idle then drove it stalled at the end of my driveway.....drove back to the garage let it sit no problems after it fired right back up, took it for a spin first corner I take car stalls.........fires right back up cruize the neighborhood for 20 min with no problems what so ever, go to get food car runs strong sounds good idles fine in the drivethrough bout 20 mins have passed and on the way hom it surges again a lil bit tach drops from 2k to bout 88 then smooths out no prob, take the car home and park it now here i am..what to look for next???