Electrical problem 4 cyl Two Wheel Drive Manual 300000 miles
I started my truck, drove it about 200 yards and it quit, like someone turned off the ignition switch.
No indication of trouble beforehand. It cranks, but will not fire up. The fuel pump runs for a few seconds when the key is turned and there is pressure at the fuel injector rail valve.
I even dropped the fuel tank and removed the fuel pump/sender. The fuel pump ran fine with 12 volts applied to it.
I put an inductive timing light on some of the plug wires and get an intermittent spark on most plug wires. It sometimes gives a single, muffled backfire when cranking, but won't fire.
About a year ago, it ran very poorly after warming up so I put in in the shop. The Ford dealership replaced an ignition block and it has run flawlessly up until now.
I went to the local AutoZone and rented a fuel pressure test kit, $149.95 deposit, plus tax, BUT, I get it back when I return it. NO RENTAL FEE!
Anyway, I connected it to the schrader valve on the injector rail. It went up to 40 lbs pressure when I cranked the key. It's getting, and holding fuel pressure, but still won't fire up!
Since one coil pack is only about a year old, I think it highly unlikely that both coil packs are bad, causing no spark.
Could the crankshaft position sensor be the culprit, since it was running perfectly, then just quit?
Only thing is, on my 96 Ranger, 2.3 four cylinder, I have to remove the air cleaner assy, the alternator belt, alternator, THEN drain my coolant and remove water hoses JUST TO GET TO THE THING!
Is there anything I can do before I go through all of that?
I'd sure hate to go through that process, remove and replace it, and it isn't the problem.
I guess what I'm trying to ask is what are the chances of this being the problem part?
have the same problem?
Friday, February 19th, 2010 AT 8:30 PM