Hi guys

So my automatic 85 camry with 200,000km on it runs great. However recently while driving on the highway mainly or sometimes up a hill, it will just start to slow down. It doesnt matter how much gas I give it. If I pull over and let idle for a minute or so it is like new again for long periods of time. The car has just had a tune up and a new coil and cold start injector put in. Any thoughts?

Thanks.

 

Does the engine miss, have you tried downshifting to determine if what happens?

Might check out the transmission.