I thought it would be nice to have an owner's manual and a fellow has a 96 version. Is it essentially the same as a 98? Or are there differences.

Also, is there a difference between an AEL gas cap and one from a non AEL Disco? if so, how can I identify which one? (I suspect the gas cap he has come from the same Disco as the owner's manual and I think 96 was non-AEL)

 

Gas cap is different ael only I would guess manuals probly same

 

Is there any way to tell from photos which cap is which? Is there any down side to using a non AEL cap? The cap that came with my 98 is a Stant locking gas cap - don't know if it is AEL or not.

 

Wrong cap trips engine light don't know how to tell

 

Yep, wrong cap would poop the CEL cuz in a 98 there's a tank pressure sensor that is a part of the AEL and it would purge to the intake or charcoal can (storage) when high.

I'm using a vented cap. I'm not sure having the gas tank sucked in to the size of a beer can, quickly loosing throttle because my newly induced vacuum overtakes the pump, is the proper way I should be driving my Disco-bomb-hoopty.....

 

Mine has a Stant locking cap on it now with no numbers on the cap to determine if it is vented or not. My engine codes are down to P1314 and sometimes P1313 - nothing I would attribute to the cap. Does running a vented cap trigger a code?