I have done the EGR test and the engine does stumble. I even blanked it off for a few days and there was still no change.

Someone mentioned the AAP in the carb might be broken. I checked the diaphragm and it's still good - no gas in vac lines. I also replaced the BVSV that controls the AAP, no change. Will try blanking off the vac line to the AAP but not too optimistic.

I am completely out of ideas!!! AAAARGH.

 

Problem solved!!!!!!!

I put a 180* stat in by mistake - a 195* solved all the problems! Thanks guys.

 

and how was it solved? Do tell...

 

hmmm that's interesting. can someone explain to me how and why that worked? engine running colder so it isn't burning fuel as easily????


I just noticed why is there two identical threads posted from you about this?

 

There's three. You missed one, it's a few threads down the list atm.

 

na thats a similar issue but from someone different. I usually pick up on these things and let the mods know.

 

Sorry about the multiple threads, I'm new to this forum business.

After scouring the net following a hunch on the stats, my theory on why this worked was that with a 180* the engine was running rich, maybe because the engine was not completely coming out of 'cold mode'. I'm not sure. It was a $10 hunch that sounded plausible and was backed up by a few posts on the net.

Either way it worked. I tried almost everything else!

 

looking at the autozone websie, it's funny the 86 carb OE temp is 195 while the 87 carb is 180 hmmmm wonder why the difference.

 

I got a 180 in mine with a 1/16" hole drilled into it because of a temp overshoot problem.

 

Kragen sold me the original replacement which was 180* and at that point I didn't even think to ask. Another local independent store who I really respect, said 180* was 'regionally correct' for my car. I called Toyota and asked if I could buy a 195* from them and he didn't even hesitate when he said yes - $20 though.

PepBoys gave me the choice of 180* or 195*, so who knows.

All my hunting around the net, it seems to be a contentious topic with guys disagreeing. LCE even promotes the 180* as being the right one for 'perfomance'.

We'll see what happens this weekend, I'm heading to Tahoe and Nevada - HOT!