|07-20-2012, 08:32 AM||#1 (permalink)|
Join Date: Jul 2011
Location: Upstate NY
Thanked 0 Times in 0 Posts
2002 3.8 upgrades
My wife's 2002 Impala with 3.8 l engine has about 80,000 miles on it with nothing done so far. My only complaint is that the mileage has dropped from 30-32 when new to 26-28 now. Plugs are original as are the wires. I suppose they're due to be changed. It runs on Mobil 1 oil. My wife is not a big fan of noise so loud exhaust systems are out. I'd like a little more power but mainly I'd like the gas mileage back. Someone told me that Bosch makes some performance injectors but I can't find them. Any advice?
Also, the brakes are due to be replaced. The current ones have been in since 30,000 when the OEM's gave out. Normally I'd just go with NAPA's best replacement parts. Again, Any advice?
|07-20-2012, 10:52 AM||#2 (permalink)|
8th Gen Antagonist
Join Date: Mar 2009
Location: Vancouver , WA
Thanked 1,202 Times in 791 Posts
Do a tune-up with factory spec parts, stick with delco plugs. Replace the fuel filter. Replacement injectors won't help, and are generally a bad idea until you do something to make a LOT more power. An overkill PCM tune will wake things up and give it a little more pep, could help city mileage a little, probably won't affect highway much.
Brakes, NAPA's finest will work nicely, the 7th gen impalas are pretty good on brakes, you can use pretty much whatever.
1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's
|07-23-2012, 06:55 PM||#4 (permalink)|
Join Date: Feb 2011
Location: New Lenox IL/Bloomington IL
Thanked 5 Times in 4 Posts
as king stated, do a full tune up with delco parts.
If you want a little more power and make the car a little more fun to drive, as stated a tuned PCM will do the job and is not too expensive. I would also look into an intake (if you just want mileage, a warm air intake will help that (but hurt performance and increase knock). Also a performance downpipe (or at least a u bend delete) would be a good idea. It shouldn't be loud if you keep the cat back but will let the car exhale better. especially good idea if doing a tune
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