My 05 altima has several error codes..335 (02,04,and 05) and 725 (01 and 03). The car acts like the starter may be going bad. Would these codes support that problem?

Could be a number of issues! To be sure you need to get the engine codes read! Take to a garage who can check the codes and this should indicate where the problem is!

Hi , you must check wiring from alternator to battery . And replace your battery terminals.

how did you find out it is the injector causing the problem? the injectors are wired in series on these vehicles, it is possible that another faulty injector may be causing the problem. although it may be difficult to find if this happens intermittently. A scope test may be the only way to find the problem. Does the engine light come on with a misfire code on Cylinder #1? P0301 or r u just getting a random misfire code P0300 ? a bit more info on the vehicle may also be helpful........ engine size? # of cylinders 4 or 6 ?

Sounds like the starter is going bad. The internals of the solinoid may be breaking down. By adding the extra amperage to the system your basically forcing it to work. You may want to check the posts on the starter. If they are coming lose they can give you the same tell tales of a bad starter.

CHECK BATTERY FIRST BEFORE STARTING VECHICLE IN MORNING.WITH CLEAN TIGHT BATTERY CABLES AND BATTERY TERMINALS OR POST CLEAN FROM CORROSSION.THE BATTERY VOLTAGE SHOULD BE 12.6 VOLTS.IF NOT BATTERY WEAK.IF BATTERY VOLTS OKAY.THE STARTER SOLENOID OR STARTER IS FAULTY TAKE TO AUTO PARTS STORE TO TEST IT.AS A REMINDER TURN OFF RADIO BEFORE DISCONNECTING NEGATIVE BATTERY CABLE TO KEEP FROM LOCKING OUT RADIO.

The accelerator is a potentiometer connected to a pedel and the wires go directly to the ECM. If the AWU( accelerator Working Unit) was bad the engine would run constant at 1800-200 rpm. Do any codes come up? I will do some more research and repost.

Your ECU is fried my friend. that sucks bad. You can only take out your battery while the engine is running on cars that don't have ECU's.

change your crank angle sensor and it should fix your problem

New starter would be in order for you.

Sincerely,

JC