Got the throttle body...
 

of course the pintle but not into the cavity (IAC?)...should I get a spray cleaner or small brush for that area...? On the 89 I think the pintle is the IAC...? (Haynes manual)

While @ the 'bone-yard'...I took the throttle body off a 3.8 L to see what's behind the 'butterfly'...just a long straight air chamber...https://lh3.googleusercontent.com/_N...0/DSC00114.JPG

Here is a shot of the backside of the 'butterfly' on the TB from the bone-yard....:eek: A lot of carbon build-up....so I cleaned the front side of mine....How do you clean the backside areas without taking the whole TB off....???
https://lh5.googleusercontent.com/_N...0/DSC00115.JPG

(This photo shows the TB taken off of the TB base...& it's upside down...laying atop of the engine area...)
Taking the TB off isn't too difficult with the main bolts/nuts but the lower two (2) 10 mm bolts/nuts are a PITA....I think they are related to the EGR gases...not sure...:rolleyes:

The MAP screws are a bit tight...I got two loose before I had to stop for the day. The 3rd didn't break loose & I was avoiding a stripped Phillips head...:cool: Sprayed some wd-40 to try to help...I'll check the MAP when the weather break w/warm air in a few days...

This photo is from the bone-yard 3.8 L engine..w/o the MAP....they are ALL removed by other DIY'er....:(
https://lh6.googleusercontent.com/_N...0/DSC00110.JPG


Of course I'll be doing the plugs-n-wires soon as well....
If the weather breaks as forecast...I might get to a 2nd bone-yard soon as well

Thanks again for your thoughts & suggestions

From what I could see from the pix , the pintle tips are different and should not be used if not identical. You can clean the butterfly with carb and choke cleaner or throttle blade/body cleaner made for that job. Hang in there .

Yes, the pintles valves had different 'tips'...
 

I noticed that when I was having troubles trying to install the two small fastening screws....:( Dropped two & couldn't find them.

Then I notice the flanges looked similar but the screw holes were located differently when placed against the cavity opening....:rolleyes: Then checking the 'tips'....what's this...:rolleyes: Then the connector location was @a slightly different angle from the original...:rolleyes: Too many issues w/such a simple parts replacement....:eek: Duhhhh....

Now the wife limps home w/o much of a brake peddle....:rolleyes: ...I'll have another task on my hands today...

I know it's a little late for a response, perhaps your problem is fixed. But I've experianced a mouse nest in the air cleaner after a car sat awhile. Car ran ok, but it drank gas like crazy.

Thanks MiBuick..That would certainly be a surprise...
 

I too found a nest in the trunk this winter....set a few traps but no 'body'...:eek: I think it was just a short visit....hopefully...

Somewhat glad it was in the trunk...haven't noticed any electrical issues...:rolleyes:

I have been changing things here and there.... no mouse nest in the air filter, just one by the blower fan! :mad: Got it taken care of, but the smell seems to linger! :eek:

The mileage has increased substantially without much work. New air filter, plugs, wires, fuel filter, and ran a couple bottles of injector cleaner through it and now consistently getting 26-27. With every fill up I had been gaining 2-3mpgs.....

Now i just need to "check the specs on the rotary gerder.... " - Tommy Boy:D