Engine Performance problem
1986 Ford F150 V8 Four Wheel Drive Automatic 117000 miles
my truck is backfiring thru the intake under a load I have checked the compression the lowest cyl. Is 130 psi and the highest is 145 psi, fuel pressure is 45, I replaced the plugs, wires, ign. Module and the pickup in the dist. Also the tps. Checked the timing right on at 10 deg. Had the valve covers of and it appears all rockers are moving the same distance( though maybe a flat lobe on the cam) I need help could this be a flat lobe? Dished lifter? Timing chain? It smells like it is running a little rich. I have also scanned for codes and the only code is no knock sensed but I cant find a knock sensor, it did sit for a while before I purchased it and it had some bad gas although I have added about 10 gallons of good gas
have the same problem?
Thursday, November 5th, 2009 AT 8:05 PM