Grittywhiskey

For any unfortunate soul reading this in the future, for me my issue was solved by simply cleaning the crankshaft sensor in the distributor. I ended up replacing (in total,) the fuel filter, water coolant temp sensor, and all 6 plugs before digging into the dizzy. But after a broken rotor, bolt, and compressed air, it runs like a top.

Thanks for the leads everybody. After a couple days replacing most of the front end suspension, I'm back looking at this issue. The engine coolant temp is interesting, the needle doesn't raise much past the halfway point between cold and vertical. I'll look more into that one. I'll run the o2 sensor tests as well. Running though the flow chart for the crankshaft position sensor, I'm not seeing battery voltage (only ~55mV) at the harness plug when the key is on, but there is continuity from the plug to the ECCS relay. The fsm says to check F52-M94 plug, but I can't find that one either. The fact that it's getting some voltage, but not full voltage is strange to me.

I somehow have been roped into driving my buddies 93 vg30 manual from portland to colorado, but first it needs to instill some faith in me that it'll make it that far. From a cold start, it drives and pulls like a champ for around 15 minutes, when it then feels like it goes into limp mode. Won't rev past 2500-3k, and surges and sputters hard once it's in that range. Only code is for a knock sensor, but in the maf/crankshaft/ignition check, the ecu says that the crankshaft position sensor needs looked at. All this feels like a maf to me, but the (aftermarket) thing looks brand new inside and out. Pulled and cleaned it, as well as checking continuity from the plug harness to the ecu, without issue. The plug also has good power and ground, and the signal wire isn't giving me crazy voltage when revved. And yes, the plug and pins are tight/straight. Replaced fuel filter and ran some injector cleaner though with some small results, but nothing really fixed. Where is the ckps located on these rigs? I keep seeing differing info on between the interwebs and fsm that it's part of the dizzy. Little unsure why it the ecu doesn't give me an outright code 11, but does in the deeper menu. What else should I check? I'm not a nissan guy, but from my couple days of banging my head I'm seeing that the knock sensor isn't really worth the trouble, nor would it throw the truck into limp mode. Until then, I'll keep working away at these front cv axles. Thanks in advanced