I’ve changed plugs, wires, cap, and button. Wandering if ignition coil and module was next to fix my problem? It runs and shifts out fine but if I want to give it hard acceleration it does not down shift like it needs to. And sometimes misfires at a high rpm. Thoughts?
Also I’m running about 22’000 rpms at 50 to 55 mph feels like I’m not going into overdrive?

 

I'm going to assume you have a second generation Blazer with OBD2 (1996-2004). You did not indicate year of your vehicle.

If power is down it may not make it into OD. Stop replacing parts *****-nilly. Test Cam Sensor Retard with a capable scanner. If you need to buy an inexpensive capable scanner, get Car Diagnostic Pro for Android phone (unless you have a 1996 or 1997) and the BAFX OBD2 Bluetooth adapter from Amazon. About $35 for both.

Report back the cam sensor retard. Should be zero +/- 2 degrees.

If cam sensor retard is OK - up next will be compression test.

 

Ok thank you I will give it a try.
it’s a 2000 model.

 

It’s so boggy it has no real power like it should it’s frustrating and old if this helps describe something but when you start it for a few moments it spits white smoke not a lot like smoking but rapid puffs?