Greetings: I'm in the middle of repairing/replacing the fuel pumps in the (86)TR, and I noticed that the belt to the air pump is missing. Upon inspection, the pulley wobbles quite a bit, and I assume that indicates that it is broken. All I know about it is that it is part of the emisssions system. Can someone enlighten me on its function? Is it needed to run properly? Also, if someone has a workshop manual, I'll be glad to pay for a copy. Thanks! -g
The TR air injection system operation is described fairly well in Chapter 3 (subsection "air injection system") of the OM -- are you familiar with this? The pulley on the air pump is actually an electromagnetic clutch mounted to the front of the air pump (i.e., a wobbling pulley is a bad sign for that clutch, but the air pump itself may or may not have problems too -- like being frozen, causing the belt to break). I think you've already demonstrated that there aren't any serious/obvious short-term running symptoms if the air injection stuff isn't working, but it won't be healthy long-term for the precats or cats (if you've still got those) -- what's your exhaust configuration? IMO, if you don't repair the system now you'll just be paying the next Owner to repair it after a PPI...
The TR air injection system operation is described fairly well in Chapter 3 (subsection "air injection system") of the OM -- are you familiar with this? > My OM is being mailed today. > but it won't be healthy long-term for the precats or cats (if you've still got those) -- what's your exhaust configuration? The exaust is stock. I may weld up a new system or just remove the cats, after I get the other issues resolved. >IMO, if you don't repair the system now you'll just be paying the next Owner to repair it after a PPI.. Thanks Steve! - that is all great information. I intend to fix anything that I find wrong right now. I may actually remove the engine if I can locate a shop manual.
