Tuneup
Thread Starter
Intermediate
Joined: Jun 2013
Posts: 42
Likes: 0
From: SO SAN FRAN CA
Tuneup
Just passed smog. First station failed me, NO (PPM). 15 MPH MAX 437-AVE 16- MEAS 581, FAILED. Take to second shop to have work done, they just put on machine no work done, PASSED. 15mph- MAX 437- AVE 16- MEAS 362. Most readings high side. Shop wants to do tuneup, fuel system clean, and check strength of sensors. CAR, 04- 31,000 MILES- OWNED CAR 7YRS PUT ABOUT 1,000 MILES ON IT PER YR. READINGS HIGH SIDE BOTH 15 MPH AND 25MPH. SHOP SAID HIGH READINGS COULD BE HARD ON CATS OVER TIME. (OPINION) What does tuneup cosist of. No check eng light. Car stock - stock tune - KN air filter, just filter not KN setup
Last edited by bruceqmed; May 25, 2014 at 05:53 AM. Reason: MORE Info
Le Mans Master
Joined: Apr 2012
Posts: 7,815
Likes: 2,266
From: Brighton MI
Here is what I would do:
Make sure air cleaner is clean, replace if necessary. Clean MAS. Then run a bottle of techron through it. If you want to go the extra mile, replace the spark plugs and wires.
With no codes, and assuming it runs fine, I wouldn't go any further than that.
Make sure air cleaner is clean, replace if necessary. Clean MAS. Then run a bottle of techron through it. If you want to go the extra mile, replace the spark plugs and wires.
With no codes, and assuming it runs fine, I wouldn't go any further than that.
Instructor
Joined: Feb 2014
Posts: 194
Likes: 1
From: Moon, VA
The Oxygen Sensors may need to be replaced. Time can deteriorate things almost as much as actual high mileage use. The PCM reads the O2 Sensors and leans or enriches the fuel depending on what the O2 sensor tells it.
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Pro
Joined: Jul 2010
Posts: 666
Likes: 2
From: western springs illinois
Clean the MAF
Plugs and wires
CAI clean
Optional PCV and Gas filter
Zip's tune up
http://www.zip-corvette.com/97-04-c5...y-tune-up.html
Last edited by chuckeb84; May 24, 2014 at 06:59 AM.
Instructor
Joined: Mar 2014
Posts: 205
Likes: 0
From: Alpine TX
Kind of sounds to me like you are not letting the car get up to temperature for a longer period of time. Only 1000 mi/yr? Do you treat the gas? Also seems like it could get stale, not burn efficiently.
I'd go for a long trip to burn out all the old gas, fill up with new, retest it.
I'd go for a long trip to burn out all the old gas, fill up with new, retest it.
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
Plugs: NGK TR-55 (gapped at .055)
Wires: MSD Red (or any color of your choice)
New Air Filter: Paper replacement or K&N
MAF: Clean with a proven MAF cleaner - proper way to clean it to remove it off the vehicle and clean allowing any debris or build up to be removed, let dry and re-install (Follow the instructions on the Can)
O2 Sensors: At 30,000 miles I would not worry about them
Injectors: You can run some Techron Injector Cleaner or Some Seafoam Treatment in your fuel tank (At 30,000 miles I would believe they are not in bad shape, unless you got some real bad fuel)
Fuel Filter: at 30,000 it would be a good and easy change to do
You can order most or all of this stuff from JEG's or Summit Racing and most can also be obtained from your local auto parts store!
Plus, this is something you can do yourself with ease and save!
Thanks,Matt
Wires: MSD Red (or any color of your choice)
New Air Filter: Paper replacement or K&N
MAF: Clean with a proven MAF cleaner - proper way to clean it to remove it off the vehicle and clean allowing any debris or build up to be removed, let dry and re-install (Follow the instructions on the Can)
O2 Sensors: At 30,000 miles I would not worry about them
Injectors: You can run some Techron Injector Cleaner or Some Seafoam Treatment in your fuel tank (At 30,000 miles I would believe they are not in bad shape, unless you got some real bad fuel)
Fuel Filter: at 30,000 it would be a good and easy change to do
You can order most or all of this stuff from JEG's or Summit Racing and most can also be obtained from your local auto parts store!
Plus, this is something you can do yourself with ease and save!
Thanks,Matt
Pro
Joined: Mar 2008
Posts: 698
Likes: 20
From: Md
Stock?
Just passed smog. First station failed me, NO (PPM). 15 MPH MAX 437-AVE 16- MEAS 581, FAILED. Take to second shop to have work done, they just put on machine no work done, PASSED. 15mph- MAX 437- AVE 16- MEAS 362. Most readings high side. Shop wants to do tuneup, fuel system clean, and check strength of sensors. CAR, 04- 31,000 MILES- OWNED CAR 7YRS PUT ABOUT 1,000 MILES ON IT PER YR. READINGS HIGH SIDE BOTH 15 MPH AND 25MPH. SHOP SAID HIGH READINGS COULD BE HARD ON CATS OVER TIME. (OPINION) What does tuneup cosist of. No check eng light
Find a real mechanic
. GL!Did you get HC & CO readings too?
Ever have lean codes w/ this car?
Last edited by cvm; May 25, 2014 at 05:42 AM. Reason: HC CO