Hello, and thank you van gurus for this incredibly helpful thread. I’ve had ongoing cold start issues since I resurrected by 85 Van last year. I’ve narrowed it down to everything but this air valve. Cold start time switch is good (was replaced along with the Bosch connector), cold start injector passed ohm test and is confirmed to be working, I cleaned my throttle body when I did the TPS, I replaced all vacuum lines and verified there are no leaks, I even tried a spare ECU since I had one from the junkyard.Originally Posted by llamavan
And still, when cold starting I got to put my foot on the throttle a little to get it to start. Otherwise, it’s exactly like Gwen describes here, I’ll hear it fire up but promptly die. I followed the on-vehicle check outlined on page FI-57 (that was quite a stretch with the longest pair of pliers I had) and it failed. No change in RPM.
So last night I pulled my intake and got the air valve out, and unfortunately it looks good, as illustrated in the repair manual??? Looks just like my other one, open just slightly at room temperature. Ohms are the same on both too, at 44.
I’m wondering if anyone knows a little more specifics about how these work. Like what’s the 7mm adjustment screw do? Does the heat coil change with coolant temp and then move the gate valve accordingly? If so then what is the actual electrical connector for? Or does it run off the ecu temp switch (which I have also replaced)? Lastly has anyone experimented with rebuilding these using parts from other Toyota air valves? I looked around online and it seems like other models had air valves just with different shapes.
I’m taking my fuel injectors to be cleaned and tested and I’m waiting on an intake gasket from rockauto, so I have a little while to figure out what I’m going to do. I would hate to put my new/old air valve in and have the same problem. Any input would be greatly appreciated, this forum has been a lifesaver.
Reply With Quote
