stock formula doing 15s ?
#22
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clogged cat could, there's tons of possibilities why a car won't run right. You said you had codes for the converter too right? Possibly a transmission issue, that could be it too.
#24
yea I meant cat sorry the trans is good I just wasent to sure about the cats being clogged and lacking power cause its not a common issue but that's what seems to come to mind until I switch exhuast over
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#25
TECH Fanatic
Give us th run down of what you have done so far
New plugs
New plug wires
New fuel filter
Cleaned maf
New o2s
Seafoamed
Feel free and add what else you have done
New plugs
New plug wires
New fuel filter
Cleaned maf
New o2s
Seafoamed
Feel free and add what else you have done
#27
I cleaned mass airflow new air filter it had a k&n I through that one out don't trust those just picked up a wix at napa checked a couple of plugs today which were fine but a little lean but gonna do plugs as soon as I get my headers Wich will be this week but other than that that's it
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#28
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#30
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And just because you see track cars with lights on, doesn't mean you should, and doesn't mean their lights mean anything serious. My car has a brake light, abs, and airbag light on due to removing things. All non serious things. Sometimes I will have a check engine light because I don't leave my key turned long enough before I finish turning it to fire it up. That is due to not leaving enough time for the 02's sensors heater to do it's thing before running it. Not serious, but looking at my dash it shows the illusion of major problems
my point, fix your known problems asap
#32
11 Second Club
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so I just bought a 2000 formula and I took it to the track and it did 15.5 and I know that has to be near impossible this is my first race car so I don't know a lot about it but I know I should be doing high 13s unless there is something different with the formulas doubt it tho I'm also getting codes for converters and 02 sensors any ideas ?
I live in Illinois and I know its not the driver did a couple of runs and had some friends to times all the Same and mph is only 92 and the times were 2 6 10 13 15 I'm not gonna take it till I I install the exhaust I'm pretty sure the hearders and extensions will work if not time for fuel and compression test
How many miles are on the car? Any prior maintenance done?
Getting it dyno'd is a horrible idea. Obviously something is wrong with it with a 92MPH trap speed. No sense in blowing money dyno'ing it to prove nothing other than your numbers are low and possibly hurt things in the process.
The rear O2s are used for nothing other than checking the status of the cats, no sense in replacing them to aid in performance/drivability. After installing your headers, you'll need to have them tuned out anyways.
#33
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Its real posssible the cats are partially clogged for it to be running that slow, especially since you have cat efficiency codes. Your 2.3 60 time is slow but with Mickeys on the back you should easily be in the 13s. You could pull both front o2 sensors & go drive it & see if it has better acceleration. Thats one way to see if the exhaust is restricted.
#34
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Seems like theres a possibility that the cats (or at least one) is clogged. I've seen it happen on ls1 cars, back when they were newer there were problems on a few cars with it. Even if you unhook the o2 sensors, the car should run better than it does. I've had plenty of stone stock ls1 cars that ran anywhere from 13.0s to 13.50s. It should run around 8.90s on street tires bone stock at least.
#35
Originally Posted by ZTwentyAteU
Seems like theres a possibility that the cats (or at least one) is clogged. I've seen it happen on ls1 cars, back when they were newer there were problems on a few cars with it. Even if you unhook the o2 sensors, the car should run better than it does. I've had plenty of stone stock ls1 cars that ran anywhere from 13.0s to 13.50s. It should run around 8.90s on street tires bone stock at least.
Originally Posted by flintwrench69
Quote:
Originally Posted by youngbird
yea I meant cat sorry the trans is good I just wasent to sure about the cats being clogged and lacking power cause its not a common issue but that's what seems to come to mind until I switch exhuast over
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Its real posssible the cats are partially clogged for it to be running that slow, especially since you have cat efficiency codes. Your 2.3 60 time is slow but with Mickeys on the back you should easily be in the 13s. You could pull both front o2 sensors & go drive it & see if it has better acceleration. Thats one way to see if the exhaust is restricted.
Originally Posted by youngbird
yea I meant cat sorry the trans is good I just wasent to sure about the cats being clogged and lacking power cause its not a common issue but that's what seems to come to mind until I switch exhuast over
Posted from LS1Tech.com App for Android
Its real posssible the cats are partially clogged for it to be running that slow, especially since you have cat efficiency codes. Your 2.3 60 time is slow but with Mickeys on the back you should easily be in the 13s. You could pull both front o2 sensors & go drive it & see if it has better acceleration. Thats one way to see if the exhaust is restricted.
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#36
OP for you to never have seen clogged cats on an LS1 before you haven't been around them very much. GM actually issued a service bulletin about it and would fix them free of charge...so it's a known and common issue. Hope you get it figured out.
Btw is it possible that it's not a LS1 and it's a 5.3 or 4.8 and just don't know. What are the casting #'s on the heads?
Btw is it possible that it's not a LS1 and it's a 5.3 or 4.8 and just don't know. What are the casting #'s on the heads?
#37
yea I really haven't been just staring to get to know a little about then as I want to keep my formula but I do know forsure its an ls1 the heads a 853s
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#38
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It is possibile that the cats could be clogged on this particular car, since something is obviously wrong with the car to be so down on power.
For a cat to actually become clogged, it is usually the result of the cat overheating at some point, due to too much fuel in the exhaust and a melted substrate (misfires dumping lots of raw fuel, ect.). Impact damage to the cat can also break up the substrate and restrict flow.
#39
TECH Fanatic
Is the car auto? Low on trans fluid? This will make the converter not transfer all the power to the transmission. My V6 auto ran 14.8@90mph with nothing more than a tune and an exhaust cutout.... something is definitely wrong with the car, not the driver.
#40
Trunion King
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With a K&N filter, MAF would be def filthy causing to have false reading and O2s responding after the fact and fouling for possible excessive fuel.