1990 Ford F150 5.8L v8?
(2010-05-30 19:53:38) 1. Says: Dose anyone know what compression should be in a 1990 Ford F150 5.8L 351 v8 its all EFI motorwith a autotrans!2. Says: 120 to 140 psi or so. Compression levels vary some depending on how you do the test and what tester you're using. The more important thing is comparing the cylinders. Keep a charger/booster on the battery, so the engine doesn't get slower as you crank it and compare readings. No more than 10% difference between cylinders is good. Tag: 1990 Ford F150 5.8L v8?
