86 2.5 L Sputtering and loss of power at certain speeds

[comanderche]

86 2.5 L I don't know what to think I have changed the coil, the distributor cap and rotor, the map , I tested the cps it read like 217 ohms. should I replace that to?

[87Warrior]

Your resistance is within spec on the CPS. How is your voltage?

http://cruiser54.com/?p=50

 

If you haven't done so already, clean up the grounds under the hood. Also verify the rubber 4 hose block attach to the engine side of the throttle body is sealed. Mine was dry rotted so I ran individual vacuum lines to the side of the TB.

 

The 2.5 relies heavily on the CPS, MAP, Manifold Air Temp (MAT) and Coolant temp to run smoothly. 

 

I had a similar sputtering condition with my 86 a few years ago, but in the dead of winter. Tested the MAT and found it was faulty, registering no ohms regardless of temperature. I was unable to source a new sensor so I tried one from a HO. Even though the ohm readings are way different between the Renix and HO, it fixed the sputtering I was encountering.