Jerky problem with an XT

[Scot]

I've owned my 1988 Subaru XT, 1.8L almost since it was new. It just turned over 350K miles. I've always done my own work and it is still in terrfic condition with original engine and transmission. The engine runs well, but intermittently fails to fire, causing the engine to jerk, especially upon acceleration. I know it is not a misfire problem and the code I am able to pull from the computer is "crankshaft angle sensor." I suspect the crankshaft angle sensor is in the distributor. The local dealer says they don't have a crankshaft angle sensor available in their parts catalog. A new distributor from them costs $674, yikes!

Has anyone experienced this problem or can offer some advice? Thanks.

[zukiru]

those use a photo-electric eye and light through a disk with slots.

 

the assembly can be cleaned.

[john in KY]

The CAS is indeed located inside the distributor. Very slim chance I may still have an 88 XT distributor. Have to look around.

[Scot]

Wow. Problem solved! I simply partially disassembled the distributor and gently blew-out the dust with compressed air. It runs like new again and it idles perfectly as well. I've struggled with this problem for years, just the last few months it had gotten worse. I've always tried to compensate for this problem with adjusting the timing, the air mixture screw, the Throttle Position Sensor, and clean the injectors. The The dealer wanted to sell me a distributor and all I had to do is send a word out over the net and somebody from Kentucky knew how to fix it, and then another good-ol-boy from Alabama was willing to help as well. Who knew that part of a tune-up includes blowing the dust out of the distributor? Thanks guys.