2000 ford f150. 4.2 liter, idles rough, remove coil wires , no difference in performance, checked OHMS across secondary resistance, read at 13.5k specs say it should be withing 6.5 ohms to 11.5 ohms. ,, the primary resistance should be at 0.3 to 1.0 ohms, i'm at 0.8 ohms from the pos to all three negs, on the primary, any further ideas,, compression was my next step.. ?? i did a heat test on the exhaust manifold, 3 of my pistons were at 220degressF.. other 3 were at 550degreesF at the exhaust manifold, ideas ??
Apr 18, 2011 at 9:27 PM