98 z is sluggish
This is a discussion on 98 z is sluggish within the General Help forums, part of the LSx Technical Help Section category; my 98 z is somtimes sluggish on take off and at lower rpm. barely will run but at 3000 and ...
04-05-2011, 02:19 PM #1
98 z is sluggish
my 98 z is somtimes sluggish on take off and at lower rpm. barely will run but at 3000 and up comes alive and screams, this doesnt happen every time i drive it, only every so often. o2 codes come up somtimes. could it be the cats or the o2's or both?
04-05-2011, 02:29 PM #2
it can be both, try cleaning ur TB and MAF as well. are you running a gm o2 sensor or aftermarket?
04-05-2011, 02:40 PM #3
i have no idea what they are, the original owner done some exhaust work so no idea, i cleaned the maf and it ran amazing for about 100 miles and started the same thing again,but not as bad
04-05-2011, 02:42 PM #4
What filter does it have? Is it a K&N and have you oiled it lately?
Does the car stumble or just seem powerless at low RPMs?
04-05-2011, 02:57 PM #5
k&n ive not drove enough to oil it less than 500 milesnand yes falls on its face at low rpm,then around 3k comes alive
04-05-2011, 03:01 PM #6
Maybe the prior owner did and its cloggin up your MAF after you drive a bit? You said it runs well and then does it again.
04-05-2011, 03:03 PM #7
yea,after a maf cleaning it runs great
04-05-2011, 03:17 PM #8
I take it you just bought the car less than 500 miles ago?
I would clean the maf again and if it does it again you MAY have your answer.
04-05-2011, 03:32 PM #9
04-05-2011, 03:36 PM #10
i will do that, after looking i dont see any cats so i know they are not bad! could there be any other problems
04-05-2011, 03:38 PM #11
04-05-2011, 03:40 PM #12
yes, almost as soon as i clear them.
i see that as a problem,no cats but o2's
04-05-2011, 03:52 PM #13
If the previous owner did it right he should have tuned out the rear O2 sensors. Once you know which bank is the one giving issues you can try swaping the front sensor with a rear one. They are the same. If the problem is one of the sensors it will show a new O2 sensor code because you changed its location.
04-05-2011, 03:57 PM #14
shows low voltage and a no activity code for bank 1 and 2
04-05-2011, 04:04 PM #15
04-05-2011, 04:25 PM #16
i think it only has 2, ill run it up on the lift when i get home and see for sure.
thanks for the advice too! i'll keep you updated
04-05-2011, 05:21 PM #17
it may not be getting power to the sensors, for some particular reason, definitely check for chaffed wires, or it could possibly be coincidentally two bad O2 sensors
04-07-2011, 04:34 AM #18
- Join Date
- Apr 2011
- syracuse ny
- 2000 trans am
I second cleaning the TB and MAF, and its easy to do.
04-08-2011, 11:29 AM #19
- Join Date
- Feb 2010
- Springfield, Missouri, United
- 2000 z28 6 speed
When i deleted my cats it ran like crap and when you got on it it came alive, i had frost tune my ecu and that fixed the problem. Also when you turn off those codes with what i assume you are using is a code reader, the computer still reads a code it just doesnt show up on your dash.
04-08-2011, 01:27 PM #20
Possibly bad fuel filter or fuel pump??
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