My '85 EA82T runs and idles fine, but if I rake off the oil cap, or even pull out the dipstick while it is running, it bogs down really bad and sounds like it is going to die. It doesn't die, but it runs like crap. PCV system??? The PCV valve is new (non-OEM) and I just put all new PCV hoses on too.

 

Also, the cold idle works great, but when I start her up partially warm the idle is low and she idles rough until she gets up to operating temp. Ideas???

 

cheers

I have heard that non oem pcv valves are a bad idea...

Not sure about the idle, maybe a bad Auxiliary air valve?

I am having a similar problem, bearly idles with oil cap off. And poor idle on warm start up, this weekend (with my trusty FSM in hand) I will tear into mine, checking: all resistances for injectors, egr silinoid, coil, install new intake gaskets, check the pcv system and maybe install new hoses if needed, check the thermo valve for the Evap canister and post my results when finished. Hopefully I will be able to find something amiss.

i figured EA82's were supposed to do that! i resealed an EA82 last summer. complete valve job, ported and polished heads, delta cams, all new seals everywhere (except rear main), disassembled and cleaned all the HLA's, new OEM subaru PCV valve, timing belts, pulleys. when i was done the car was running like crap. while i was leaning in the engine bay i noticed that if i pressed on the oil cap the car smoothed right out and idled great. when i pulled the cap off it ran like crap, sputtered and i think it even cut off but maybe not. pulled the cap and realized one of the seals/gaskets in the head set was for underneath the oil cap. replaced that seal and the car ran great. still would idle bad when i removed the cap though, i figured it was supposed to do that since everything else was new and the car ran awesome with the cap on.

i figured EA82's were supposed to do that! i resealed an EA82 last summer. complete valve job, ported and polished heads, delta cams, all new seals everywhere (except rear main), disassembled and cleaned all the HLA's, new OEM subaru PCV valve, timing belts, pulleys. when i was done the car was running like crap. while i was leaning in the engine bay i noticed that if i pressed on the oil cap the car smoothed right out and idled great. when i pulled the cap off it ran like crap, sputtered and i think it even cut off but maybe not. pulled the cap and realized one of the seals/gaskets in the head set was for underneath the oil cap. replaced that seal and the car ran great. still would idle bad when i removed the cap though, i figured it was supposed to do that since everything else was new and the car ran awesome with the cap on.

 

Huh... interesting... it only does this on my EA82T. Doesn't make a bit of difference on my N/A if the oil cap is on or off.