[clmozesc]

Has anybody else gotten a p0300 or any trouble code after installing udps? If so what are the typical causes and fixes?

[HMUSN]

A P0300 OBD code indicates a random or multiple misfire.
Symptoms
Symptoms may include:

* the engine may be harder to start
* the engine may stumble / stumble, and/or hesitate
* other symptoms may also be present

Causes

A code P0300 may mean that one or more of the following has happened:

* Faulty spark plugs or wires
* Faulty coil (pack)
* Faulty oxygen sensor(s)
* Faulty fuel injector(s)
* Burned exhaust valve
* Faulty catalytic converter(s)
* Stuck/blocked EGR valve / passages
* Faulty camshaft position sensor
* Defective computer
and lastly welcome to the forums.

[slrvstang2007]

wow thats a long list of problems, to bad the tuner cant narrow it down to a certain area. hopefully u can get it fixed with out spending to much money. But how can UDP's cause any electrical or computer problems or problems with the cats? maybe i've been misinformed on what the UDPs actually do..

[stanglifemike]

I dont know how the udp's would have caused problems, never heard of that before. Sorry to hear about your probs man. Keep us informed.

[MaverickMLFD371]

did you unplug your battery and allow your computer to reset while installing the pullies??

that can happen if you dont reset the computer. thats why most performance parts tell you to allow the computer to reset so it can relearn the "new part". I did it on my car and forgot to unplug the battery, threw the same code. unplugged the battery afterwards for 20 min, allowed it to reset. the CEL and codes went away and never came back. car ran great with the pullies.