Battery has gone out, was original (ACDELCO) and sub-par
Replaced Ram Air Intake sensor, caused shifting abnormalities.
Possible Speeding tickets...
I modified this car with the following...
Replaced Air Intake Sensor, stock was junk
Replaced Air Filter, stock was junk; K and N of Course
Replaced Exhaust mounting coupling system
Replaced computer chipset, replaced with high performace chipset with variable controls and settings (Dashboard mounted)
Replaced Ram Air Intake sensor, caused shifting abnormalities
Replaced Tires
Tuned Suspension
Installed performance bearings, new fuel injector system, and spark plugs (yah they were still stock at 90k miles).
With these modifications the car handles, and performs beautifully.
Cabin space is excellent, sporty design, very good handling, Leather is definetly your friend in this car as your drink will fly out of your cup holder before you loose traction. Will fit 5 adults snugly, and better hope that atleast one of them is short.
With the above modifications, a grand total of about 1500 bucks in parts and labor (not including 1k for tires), will turn this car into a GREAT ride! Stock it is OK too. This was my first car, and I am now in love with it. Take good care of this one and it will take care of you, feed this thing premium! Soon I will install a new exhaust system, turbo charger, new oil pump, and oil reservoir. This car definetly has a hot engine.
Further notes:
This car performs best with synthetic blend motor oil in my climate which is N. California: the central valley.
You should dump the air filter and buy a performance filter first thing.
Buy a radar detector with this one, and please be safe don't speed on Highways, or in heavy traffic, speed does kill, take it to the race track and just get it out of your system.
Performance within class:
This car rocks. It will eat any comparable import alive, American muscle is starting to rear its ugly head once again (kinda sorta maybe...nah 220 is nothing compared to my buddies 720 hp Nova). Great gas mileage! This car rivals the civic, with modifications of course. Dino'd at 220 hp, a big increase over the 175 hp stock, in gas mileage mode on Comp, unknown in performance mode (Computer malfunctioned awaiting repair).
I have a 2000 Grand AM GT CP1, and it rocks. Here is a list of performance parts that I have added myself:
1.) SLP Performance Stainless Steel Cat Back Exhaust System (10-12 HP gain, Highly Recommended over Borla)
2.) Installed larger Throttle Body with 62MM Opening.
(10 HP Gain)
3.) PCM was reprogrammed by Digital Horsepower, Check out PFYC. COM for Grand Am Performance Parts.
Speed limiter removed.
3-1 and 4-2 skip shifts.
Transmission line pressure increased.
Shift points moved (5800-6000rpms).
Fan turn on points: 186 degree F turn on.
2 minute fan on at key-off (this feature activates when engine coolant is 179 degrees or greater).
Fuel/spark adjustments as follows:
Enrich-ens fuel delivery for critical problem areas
Provides a consistent power gain across the entire power band.
Reduces spark retard (knock retard).
Dynamo-meter testing has shown up to an 6 to 10 HP gain in 60 degree temperatures on a development vehicle using 93 octane fuel.
4.) K & N Air Filter Installed.
5.) Using Full Synthetic Oil and K & N Oil Filter.
6.) 185 Degree Thermostat (Factory Thermostat is 195) This is a great combination with the computer fan setting.
7.) Installed Killer Sound System. (Used MTX Interior Powered amplified speakers and Sub woofers, This thing turns heads when I rock Heavy metal down the road)
This car screams custom, only problem I have with it is I live in Ohio, which I would recomend never to live here.
All together, I've spent roughly $3000 on everything. This thing performs wonderful on the highway. Going from 70 to 100 is no problem. I would like to add headers to it someday.
Gas mileage after improvements jumped from 13-15 city, 20-24 highway to roughly 18-22 city now, and 30-35 highway. Spending money was well worth it do to the rising cost of gasoline. Adding headers would further increase gas mileage.
This is a great car to work on, can't beat it. I'm going to drive this car until Ohio weather completely destroys it.
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