I have a 4x4 2002 chevy blazer with a 4.3. it runs very rough sounds like it is missing out. we put new plugs and wires on it along with the MAP and MAF. I replaced the TPS. nothing has helped. I can unplug the TPS and it will run fine it just wont idle after I give it gas. any ideas?

 

Have you removed the throttle body and cleaned it?

Before you replaced the TPS sensor (or any of the sensors for that matter), did you actually test anything to make sure that was your problem?

 

I have cleaned it. TPS was bad the spring in it was broke. it was giving a random cylinder misfire code. after changing the TPS it was giving a code that said MAF Circuit low volt. low. I think ill look it up and give you the codes. I have cleaned it. I did have to replace the converter on it.

sorry typed that wrong i have not cleaned it.

 

Let us know the specific codes still being stored and we will go from there. You have replaced some expensive parts already. No sense in continuing that trend without confirming that parts are actually faulty.

 

Codes are P0102, and P1345. the last one is new 1st time its had it.

 

P0102 - Mass Air Flow Sensor Circuit Low Frequency
P1345 - Crankshaft Position [CKP] Camshaft Position [CMP] Correlation

Have a read through the diagnostic charts and let us know if you have any questions. You can also search on those codes and should turn up other threads where people have experienced the same codes.