Hi

I have a 350TBI 1990 all stock, today I probed my engine with new ring (Still out my Car) and the idle up and down, beetwen 500 y 800RPM aprox. I adjust advance at 0 degree without Spout, I cleaned IAC and passager but the same problem.

I hadīt today my laptop with WinALDL connected so I canīt to see other parameters as O2, MAP,etc.

Regards from Chile

 

did you run car for a while at highway speeds? over 40 mph? that may fix the problem. OR a vacuum leak?

 

Sorry, my engine is out the car. Two month more i will put it.

Since, my problem is in Idle. Is posible that be vaccum leak, but my doubt is FOR WHAT Up and Down rev.

Thanks

 

Check all of the vacuum lines that plug into the TBI unit. Trace them with your fingers and look for cracks and or any splits in the material. Also, look at the base of the TBI unit for a leak. That is a common area for these cars to develop a vacuum leak.

 

Ok, I will check all that.

Thanks