I have a code for a crank sensor. I replaced it a still have a miss under load. It does need a vss but I don't think that would cause a miss just force it into safe mode where it won't rev above 4k. Any thoughts?

BTW it is a ej25 dohc five speed.

I have a coil pac on order figuring at 177000 miles its due hopefully it will help the miss

which cylinders report missing? bad coil almost always affect a pair of cylinders Look for pending codes

 

how long since timng belt system was serviced? maybe the car slipped timing 1 or 2 teeth?.

 

any work done before the CPS code was initially set? wrong crank sprocket or broken tabs on sprocket could be an issue - also, the ECU might get confused if a cam pos. sensor were bad?

 

I have read one or 2 reports of debris collecting on crank sensors needing to be wiped off, the magnet inside collects bits of worn idler wheels/bearings and is intermittent......

Edited December 1, 201510 yr by 1 Lucky Texan

A few simple things that are worth checking: The last 2 times that I've had a Subaru miss under load it was because of oil leaking from the valve cover into the spark plug tube. You can check really quickly if you pull the wire off of the plug and see if the long rubber tube is covered in oil. The other thing is a plugged up fuel filter can give similar symptoms.

 

Might not be it, but these are easy to check for and easy to fix if it is the problem.

I just did the timing belt when I replaced a leaking can seal. I bought the car for $350 because it was puking oil from a cam seal. It does not seem to give any kind of read on what cylinders are missing. I will check for oil in the spark plug tubes tomorrow. Wouldn't there be a cam sensor code if it were a cam sensor problem?

As for cam timing I checked it three times before putting everything back together. It also missed before doing the cam seals and timing belt. How may tabs should be on the crank pully?

code like P0302 is misfire cylinder 2, P0304 is cyl 4 misfire, etc.

New coil did nothing.

Still trying to figure this this out. Plugs are next on the list :/

kinda wondering about loose/corroded grounds and perhaps robent-chewed wires. Certainly, an older car could use some attention to ground connections - take 'eme apart, wire brush all the surfaces, reconnect and maybe coat with dielectric grease.

 

 

do you still have a check engine light? what codes are being posted?