O2 Sensor Question and Slow Times

[Hognose]

What are the signs of a bad O2 Sensor? No check engine light, but my car is not running as fast as I think it should. Are there any advantages to changing it as far as PM goes?

I ran 9.1 at 75mph in the 1/8. 2.0 60ft. Left on no boost, about 2000RPM. Streel Tires. Granted I was on pump gas and only 17lbs of boost, but I figured with my set-up I should be running faster than that.

Any Suggestions? Thanks.
Matthew

 

[azgn]

02 has no effect at WOT....it will effect driveability and mileage, but no input at WOT

signs of a bad one are slow or no cross counts, bad gas mileage

 

[Hognose]

Thanks for the info.


Just got back from the track. 100 octane Xylene mix 20lbs of boost and no change, except my 60ft increased almost 2 tenths,went from a 2.0 to a 2.19!

Any help ony why mar car is not that fast, other than tires? Thanks,
Matthew

 

[azgn]

tires are the most important part of the project....if you can't get the power down, it does no good......

(they are also the cheapest way to improve your et )

 

[Pronto]

Tires make a huge difference....So does a little boost at the line.

 

[BarnesGN]

Many factors come into play like rich condition causing slow spool, what do you use to tune?

What are your maf readings?

75 mph is about like a stocker so you do have a problem I would try tuning.

 

[Hognose]

What are the maf reading on the scanmaster?
I just changed plugs and cleaned my intercooler the other week. a few months ago I replaced my coil pack and ignition module.
Any other suggestions? Thanks
Thanks for the help.

 

[cathan]

Yeah it sounds sickly....I just pulled a 1.9 60 foot with a stock turbo and drag radials at 5800 feet without trying too hard.

Since you did the plugs and other ignition stuff how about a new set of plug wires. Mine turn to french fries from the downpipe heat so I change them once a year. Could be the missing link as long as your fuel delivery is good etc

Hope that helps
Chris

Oh, mine also ran really slow with a bad 02.....and the MAF readings (AF on the scanmaster) go from 0-255 grams per second. If you mash the throttle and do not see 255 you have a blockage either intake or exhaust.

 

[BarnesGN]

where in va do you live?

 

[Hognose]

I will check the MAF readings on Sunday.

My plug wire are not that old. I have Taylor Spiral Pros. I have used them for years on my Small Blocks with out ever a problem of getting cooked. They still feel nice and soft.

I live in Central Va. Orange,
Thanks,
Matthew