hey there i am ne where trying to find a good vette site.
so i have a 99 vette std tranny coupe.
90 000 mile.
well last summer i noticed a slight or flat spot in the rpm range of about 3-3500 only when i hit the throttel about 3/4 and hold it there or wide open... it would climb good untill that rpm range then it kinna flat line or dropped for a mill second and then it picked up and took off ..
well that buged me.. so.
this summer i got it out i put new plugs in it and a new in line fuel filter.. wich i bought off ebay they said it intrechanged with the one i had parts number did anyhow.
well i put it on and about a week it seemed to be the same... but now today i went to get it out and it did not start it just trun over. it did this all day i put fule in it i trun it over trun it off and then it started .. to start it i have to trun the key let it crank for a second and then trun off and start aging it fires rite up.... and now i noticed it doesnt pick up very fast wide open .. like frist gear i can hold to floor and dosent seem to get to 50 very fast... and that did spot is still there..

so could it be my plugs .. becase they was advanced auto brand platinmue or the in line filter wich was the cheaper one but it was new.
and iS THERE A FUEL FILTER IN THE GAS TANK of my car i wonder if it need replaced ... i am thinkg its a fuel flow problem ????????
any help please.. i hate having a vette and it takes off like a 6

 

Lets start by suggesting that you pull your codes and see what's there. Please do that and post them. Be sure to post the "H" or "C" appendix to each code, if any. Next, check your air bridge to insure its properly seated at the intake, especially the bottom of it. Since you have a '99, check the PCV valve connection tube from the PCV valve to the intake. They are known to develop holes in them.
The no-start issue is the main thing obviously. You need to insure the fuel pump is actually providing pressure at the rails when attempting to start the car. I'm sort of leaning towards the ignition switch having problems but do these other things first. BTW, '99 was the best year!

 

i have few that are ..h... codes wich mean histoyr so no need to worry about those i was told. well
i have 2120 wich said tpm system malfunction...... wich ened in h and c i have no idea what that is yet.
i have a 1236 c wich is low system voltage..
now i had a dead battery over the winter i jump it few times then i bought a ne wbattery wich is in it now...
so can u help[ me on this may its my whole problem.. thanks
in the mean time i will cheack what u said out.
is there a fuel filter in my tank do u no if ther eis or not ..

 

http://forums.corvetteforum.com/c5-t...cal-issue.html

 

well.. didnt clean the ground syet. but i did the restet of the pcm and cleared any codes... well it made it tens times worse i went down the rode today and i mean it will not go fast at all it idels good and revs good but under load it hits about 2500rpm and just falls flat on its butt if i stomp it down it picks up real slow and doesnt seem to rev out.... after clearing the pcm codes it really meesed things up .. sop i am gogin out to clean grounds now and see what happens tommerw .. any ideas let me no.. oh and i wonder if my plugs could do that ????.. i am leaning toward that junkie ebay inline fuel filter ........... i wonder why resting the pcm made it that much worse its almost und rivable unless you do under 40 and dont hit the gas to fast ..

 

Pull the codes again now. I've run into a case long ago where I couldn't run but it would idle just fine and rev fine. This was on a 4-cyl engine in of course another car...it was plugged up cats. I would think you would have several associated codes if that was the case on yours.

 

Theres NO way clearing the DTCs caused it to run WORSE! What you need to do now is read and post the codes that return.

BC

 

man trust me it is so bad... now. my g f ask me are you stoping and gogin/jerking on purpose.. i wa slike no

ok well i am still cleaning grounds wich one under the pass side was correded bad... and plus it had a ground wire from it to the engine block .. if thatmatters... it was something to do with the stereo aftermarket ....... anyhowi will post the codes today ...
and i did think of cats cloged ... i wonder how to check them to see if they are or not

 

guess what .
i cleaned the ground and hooked the battery back up.. staterd the car and half or wide openit just sits there and spuuters wont rev at all.and to topp it all off iwas doing that for about 5minutes and noticed a smell . so itrune ditoffand got out and smoke was coming fromthe back of car ... the exhuast was so hot under theback it was almost melting the bumper.. so any ideas now.
kinn wished it justbruned up lol.

 

If English is your second language, I understand. If English is your first language, and you are typing like this on purpose.......it's difficult to read.........

 

I'm thinking that if you have a dealer nearby, you probably should have it towed to them and let them use a Tech2 on it. Whatever is wrong with it, its pretty serious or it sounds that way.

 

<iframe width="425" height="349" src="http://www.youtube.com/embed/udLZauvk8mw" frameborder="0" allowfullscreen></iframe>



http://youtu.be/udLZauvk8mw

ok here is 2 links on youtube vid of what my car is doing maybe it helps .
i cant hit th thjrottel at all it just completly bogs out and then after 2 minutes of doing this my back exhast gets so hot i thought the car was on fire ... maybe its geting unwated fuel ?

 

What IN LINE FUEL FILTER?? OEM or aftermarket and is it in the same place as the stock one?


READ YOUR FUEL PRESSURE!!!!!! Don't guess. Buy or borrow a gage and read and post the pressure at idle and when you are having the issue. On the Drivers side fuel rail theres a test fitting that one will screw in to.


What does you exhaust sound like when you are at full throttle? You could have clogged CATS.

You remove a AIR System check valve and connect a 0 - 20 PSI gage to the manifold flange and see what back pressure is in the exhaust manifold. I'm guessing you should not See more than 2-3 pounds or so at full throttle.


READ AND POST the DTCs again!

Bill

 

I noticed he said he put in the cheaper fuel filter. I have a 99 also. Unfortunately you have to use the expensive one. It has the fuel pressure regulator built in. The cheap one does not.

 

thanks for the help guys... all along it was that new in line fuel filter and yes i no it has a built in regulater.. wich i was told it had one and was made for the vette.... well all this time i should have checked it but being new i figured it couldent be bad.... well it was...
it read 28 psi on the fuel gauge wot it still sadi 28 psi... i put my old one back on and bammmmm good as new ... and my exhaut getting hot i am guessing but i say it was lean way lean when it was bogging out no gas but was getting air and caused it to get hot .. just a guess.... and after clearing the codes and pcm and cleaned all the grounds the old fuel pump was not the proble afterall.... prolly cheap fuel and it put the pc in the low octang range ..
well i learnded a lot from here....
good this is all grounds are clean now lol... lesson learned NEW PARTS CAN BE BAD ....
now i can sleep good and enjoy rest of summer lol.
thanks

 

thanks for the update. glad you have it running!

 

This fix makes about as much sense, as your sentence structure/grammar. The early style filter only has two connections. So when you installed it, you should have immediately knew something was wrong, due to a line that was left not connected.

 

you no i am on here for some help... not to be cut down about how i type and spell... i am sorry you guys are so much smarter than me and had the privalge to go all threw school .. i am glad you point out my spelling and gramme r on here instaed of worring about helping me on my problem,, i asked about about my car not about how to change my life ..thanks.