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i've experienced something very similar to the symptom you described with my s13 sr20, but i never bothered checking for codes.
it happened after i installed some rocker arm stoppers. the torque wrench i used was a piece of shit and hate myself for being dumb enough for believing it...
anyway, i ended up tightening the cam cap bolts too tight, and the cam cap/towers/whatever you calll them were way too tight and creating alot of drag on the camshafts. (i only tried to crank the engine twice and knew immediately i fucked something up so i stopped).
loosened all of them (in the proper sequence) and re-tightened them with a regular ratchet until they were tight enough. slapped my valve cover back on and reconnected everything and it started right up.
so my question to you. how did you torque down the cam towers?
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