P1391 - Loss of Cam or Crank
P300-306 - Multiple random misfire, Misfire on 1, 2, 3, 4 5, 6
Sometimes it idles better (such as immediately after installing new EGR, but it's worsened again now) and sometimes it runs without misfiring at speed, but the CEL comes on every time I clear it with at least the P300 and several cylinder misfire codes. So, symptoms vary, but the core problem (CEL and random misfire) remains.
Replaced the following very recently, most by me:
. New distributor, cap and rotor (twice, second time by mechanic)
. Timing belt (by mechanic)
. New plugs (gapped) and wires
. New crank sensor (spacer was in place on tip, so gap should be correct)
. EGR valve, gasket and solenoid
. Both EGR tube gaskets
. EGR solenoid-to-manifold vacuum tubing
Also have run drygas & fuel injector cleaner.
The problem started about 5000-miles ago with a "loss of cam or crank" code, two short misfire episodes on the way home and then a no-start in my driveway. At that time I replaced the distributor, cap, rotor, plugs, wires and crank sensor, and got it to run, but it still missed badly under load, and seemed to smooth when I wiggled the wires at the distributor. Then it went to a trusted mechanic for the t-belt and another new distributor assembly, as he felt the NAPA part I'd installed was faulty. After replacing the distributor, he was unable to get a miss by wiggling the distributor wires. He got it to run without a code for about a couple of days, but the code returned. He then helped me trace down a vacuum leak at the EGR tube, which I replaced.
have the same problem?
Thursday, February 4th, 2010 AT 5:36 PM