Loss of power

From your code p0171 and p0507 i would see if you have a vacuum leak also check your fuel pressure when the car is acting up.Did you change your fuel filter also?Let me know what you find.

You can unplug all those blue end connectors from the alarm that are plugged into all the red T Taps. Also are there any other wires that they actually cut going to the ignition switch not just T tapped into?If so what color are they?

Hello,

I suggest going by your local parts store and have them pull codes and post here.

.

I would also check your coolant temp sensor and the connector to it see if the connector is corroded if it is the connector need's to be changed. If you change the coolant temp sensor then make sure you get a brass tipped one the plastic tipped one's crack. There only 10 for the sensor and it's real common for them to fail and they cause all kind's of symptom's.

Just unplug those blue end connectors from the alarm you can reconnect the yellow wire before or after doing that. Reconnecting the yellow wire will restore the starter trigger wire. But not the dash lights if they dont come on?Or the radio. So they also tapped ito the radio wires?I didnt see that in your pics?

That doesn't mean it's not bad I have seen a lot of customer's come in not complaining about overheating but the sensor was bad cause no start's hard start's dieing etc. Just something I thought you should not over look and it's cheaper then the other thing's you have tried.

Most of the time all they do is cut the yellow wire to disable the starter but if your car already has factory keyless entry then that disables the starter and sounds the horn when the factory alarm goes off. Just see if they cut any other wires unplug all the other wires they plugged in with the alarm. Also hook back up the yellow wire they cut. Does it have factory door locks?Do you have a factory remote for the car not a aftermarket one?

Could be vacuum leak or IAC trouble? Try google and do a search of this forum for previous replys for a similar problem.

Your black box is your aftermarket alarm control module. All the cars I have seen with door locks that year had a factory security system. Look under the passenger rear bolster cushion for the remote keyless entry module. The bolster cushion is the verticle cushion closest to the door. Also when you turn the key to the run position do all the dash lights come on?