1994 Corolla has miss at idle/low RPM's only when warm

[ToyFan420]

1994 US spec 1.8L AE102. I am the second owner of the car and have put the last 80K miles on the odometer for a grand total of 178K. As the subject reads, the car seems to run fine until warm, then it lopes at idle and misses under 2K rpm or so. Seems like a vacuum or EGR problem to me. New plugs, tune-up not too long ago, new fuel filter, did timing belt/tensioner a few months back. I checked the timing and even advanced it a hair - no help there. To make a long story short, I am the proud owner of a Corvette and a Mustang, and damn, this Corolla is just flat out my favorite. I am a Toyota nut, and just need to get this car right for the fast approaching New England winter. I really don't want to take it to the dealer, but don't have a ton of time to diagnose. Where the hell is the EGR valve on a 94 1.8L? Any ideas? Can someone help me save my little car?

[94_Rolla_Guy]

unless its a california emmision vehicle it doesn't have a EGR, You didn't say anything about cleaning the throttle body i have found this tends to help things out in general, If your thinking of doing this take it right off the car and take it apart and give it a super good cleaning. Also try putting the timing back to 10 BTDC, maybe check the O2 sensor and water temp sensor. Also never hurts to run a seafoam or other fuel system cleaner through.

[ToyFan420]

Originally Posted by 94_Rolla_Guy

unless its a california emmision vehicle it doesn't have a EGR, You didn't say anything about cleaning the throttle body i have found this tends to help things out in general, If your thinking of doing this take it right off the car and take it apart and give it a super good cleaning. Also try putting the timing back to 10 BTDC, maybe check the O2 sensor and water temp sensor. Also never hurts to run a seafoam or other fuel system cleaner through.

I'll try cleaning the TB, and running some fuel system cleaner through. The O2 sensor is recent, replaced when I put headers on. Also, the coolant temp sensor was something that I thought might be causing the problem, but the car still loped at idle with the sensor unplugged, so I didn't check it's resistance. So there is no EGR? So I could swap in a JDM 4AGZE and not have to worry about passing a visual emissions check, because the car never had an EGR system in the first place. Interesting...

[94_Rolla_Guy]

with the EGR you gotta look, most likely it doesn't but some do if it does there will be 3 vac lines comming out of the top of the throttle body (rather than 1) and there will be a round black plastic thing clipped on to the intake manifold just behind the throtle body