Engine issues!! HELP!! 2000 camaro SS

[94Z28BLK]

4 days ago after getting gas and letting the car sit for the time i was in the gym (1-1 1/2hrs) i proceeded home when i didnt even got a block and the car started to buck and felt like i had no gas. I got out and fiddled with the gas cap which felt loose and everything was fine. Flash to yesterday, trip to gym no problems, come back out start the car and was having a conversation when the tone of my ca changed and i could hear it running terrible. Exhaust not was choppy and sounded like it was backfireing, also felt as if air was being sucked into the tailpipes and not firing out of them, then the check engine light started to flash. Played with the gas cap a little bit and was able to get home but the car wasnt running right. ANY SUGGESTION!!

Key Points- about 2 months ago I installed LT headers, removed my cats (ORY) and removed all my emissions (AIR,EGR). I have not gotten my PCM retuned for that so my check enhine light has been on anyway. once this happened i immediatly thought of my computer and ordered a tune from PCMforless calibrated for my upgrades. Please Help! My poor baby!

[BullittSVT]

Fiddling with the gas cap won't do any good, it's just a cap.

Now when you say air was going INTO the exhaust system, do you mean it sounded like a vacuum or something? Your flashing check engine light means your car is misfiring, which means you can have defective spark plugs.. wires.. injectors.. maybe o2 sensors..

Can you explain what happened when your car felt like it had no gas, did it shut off?

[Blackbirdws6]

Pull the codes from the PCM would be where I would start.

[WiMiMc]

When i had a bad temp sensor my car would have symptoms similar to that

[WildBillyT]

Get the codes in the PCM first. Anything else at this point is speculation.

[KirkEvil]

Scan for codes next time the check engine light comes on. Its most likely the O2 sensors. Did you use a plug and play extension harness or splice the wires yourself?

[sweetbmxrider]

I agree on most likely an o2 issue but also recommend the whole scan thing first.

Scan for codes next time the check engine light comes on.

The codes will be stored in the computer unless the OP erased them or disconnected the battery.

[WildBillyT]

I agree on most likely an o2 issue but also recommend the whole scan thing first.



The codes will be stored in the computer unless the OP erased them or disconnected the battery.

Especially if the headers were new and the O2s were not changed. But time for a scanzors.

[1320B4U]

I would've said bad gas/possible h2o in the system but if its intermittent then it's probably be related to the ignition system.

[94Z28BLK]

BullittSVT: The car would bogg out and then pickup and then bogg down again, no throttle response. Car never shut off though. Also what i ment like the exhaust sounded like a vacuum what i mean is it didnt sound like the exhaust was coming out of the pipes, it was very soft and bogged down. A popping sound, some smoke came out after the last time i took it down the road.

KirkEvil: a buddy of mine whose also on this site spliced the wires for me. he did a pretty damn good job, but we didnt replace the o2 sensors, out of the 4 we took the best 2 since i dont have cats anymore.

WildBillyT: Definately want to get the new codes put into the PCM and see what happens after

[sweetbmxrider]

WildBillyT: Definately want to get the new codes put into the PCM and see what happens after

Go to autozone and get the computer scanned. Write down the codes they retrieve from the computer and then post them here.

[S.J.SLEEPER]

Stop going to the Gym if thats the only time car acts up...lol

Seriously, post costs and we'll help you.

[Jersey Mike]

Pull the codes. Any parts store will have an OBDII scanner that you can use/they can hook up for you for free; Napa, Autozone, Advanced Auto, or any garage/shop/mechanics.


Post the codes here.

[KirkEvil]

KirkEvil: a buddy of mine whose also on this site spliced the wires for me. he did a pretty damn good job, but we didnt replace the o2 sensors, out of the 4 we took the best 2 since i dont have cats anymore.



I originally spliced mine and thought I did a good job but some of the connections must have loosened over time and thats all it needed to start burning through o2 sensors. If the scan comes up with o2 sensor issues, I think you should replace both the harness and o2s.

[LTb1ow]

IDK if anyone mentioned it, but why not have a parts store pull the codes and report back?

[WildBillyT]

I originally spliced mine and thought I did a good job but some of the connections must have loosened over time and thats all it needed to start burning through o2 sensors. If the scan comes up with o2 sensor issues, I think you should replace both the harness and o2s.

This is good advice. If the splices are soldered the O2s may be off. Soldering connections on signal wires can create problems due to additional resistance from the solder itself. Might be rare but it does happen.

[sweetbmxrider]

IDK if anyone mentioned it, but why not have a parts store pull the codes and report back?

No, no one mentioned this but would be a good idea.

[Blackbirdws6]

Get the codes in the PCM first. Anything else at this point is speculation.

Scan for codes next time the check engine light comes on. Its most likely the O2 sensors. Did you use a plug and play extension harness or splice the wires yourself?

Go to autozone and get the computer scanned. Write down the codes they retrieve from the computer and then post them here.

Pull the codes. Any parts store will have an OBDII scanner that you can use/they can hook up for you for free; Napa, Autozone, Advanced Auto, or any garage/shop/mechanics.


Post the codes here.

No, no one mentioned this but would be a good idea.

:bertstare:

[1320B4U]

Can you do the paperclip jumper to flash codes on the dash of that car?

[WildBillyT]

Can you do the paperclip jumper to flash codes on the dash of that car?

Nope, car is too new for that

[NJ Torque]

I would put money on the 02 extenders/02 sensors failing.

[sweetbmxrider]

I would put money on the 02 extenders/02 sensors failing.

How much money? :)

[V]

I have HPtuners and can pull the codes for you.

I have to go to LI to pick up doors tomorrow at noon, but I should be home by 2pm, and could do it in the afternoon.

[94Z28BLK]

Thanks for all the responses guys. Only thing is my computer isnt updated for the missing 02s from when i put the headers on. so should i just wait until i get the new pcm from pcmforless, run it, and see if it throws codes. only because wont it already be throwing out codes for emissions (EGR,AIR- took thjat out) and 02s (took the cats out). Be hard to say what thr problem is.

V: Ill PM you my number, if we are both around and you want to swing by you can

[WildBillyT]

Thanks for all the responses guys. Only thing is my computer isnt updated for the missing 02s from when i put the headers on. so should i just wait until i get the new pcm from pcmforless, run it, and see if it throws codes. only because wont it already be throwing out codes for emissions (EGR,AIR- took thjat out) and 02s (took the cats out). Be hard to say what thr problem is.

V: Ill PM you my number, if we are both around and you want to swing by you can

I think the consensus here is that your FRONT O2s may be bad due to the header install. The rear ones do not adjust your AF ratio.

[8hnpSS]

if i had my code reader at my house id say i could help you considering it looks like we live in the same town lol. but its in my silverado in storage :hammer:

[94Z28BLK]

if i had my code reader at my house id say i could help you considering it looks like we live in the same town lol. but its in my silverado in storage :hammer:

Thanks buddy, V already contacted me I think we are going to get together within the next few days and pull the codes. after hearing what you guys r aying and doing a little reading. It seems like my O2s are bad. at least im hoping thats the problem.

I ordered a new tune from PCMforless thinking that was the issue, so im waiting on that. Either way seems like ill be pulling a few more ponies out of he with the tune

btw where in Nwood do you live?

[JL8Jeff]

O2 sensors usually get damaged when you remove them plus any coating or oil that might be on the headers can burn off and destroy the O2 sensors. I would get some new Delco O2 sensors and some quality O2 extensions. I think one of the Corvette O2 sensors has a longer wire and will reach without an extension.

[8hnpSS]

Thanks buddy, V already contacted me I think we are going to get together within the next few days and pull the codes. after hearing what you guys r aying and doing a little reading. It seems like my O2s are bad. at least im hoping thats the problem.

I ordered a new tune from PCMforless thinking that was the issue, so im waiting on that. Either way seems like ill be pulling a few more ponies out of he with the tune

btw where in Nwood do you live?

i live in the apartments by the buckingham for now. i just moved here a year ago but will be moving to a house soon

[94Z28BLK]

wow, just looked up some new AC Del o2s. was NOT expecting them to be $105 a pop. plus the extra $40 for some nice extensions. ughhh bank account hates me right now! I guess its what needs to be done.

[Featherburner]

Sparkplugs.com Denso units. $45 each.
http://www.sparkplugs.com

[WildBillyT]

Look on rock auto.

[BullittSVT]

Amazon has them real cheap too, PM'd you a link.

[94Z28BLK]

Ordered myself some new O2s and extensions. O2s will be here wed, extensions not until fri or later. Can't catch a break. Ill keep you guys updated. Still need to pull the codes and see if the O2s are actually the problem, but regardless they are beat up and homemade spliced.

Thanks for all the responses, helped a lot and if nothing else was a good read and time killer

[94Z28BLK]

Everything was delivered today! PCM, Extensions and O2s. Now i just need to find a way to get this car jacked up enough so i can reach the plugs for the 02s.

[sweetbmxrider]

Make sure you zip tie the o2 wiring away from the exhaust but leave a little slack for movement.

[94Z28BLK]

Little update boys. As you know all my parts came in. my buddy down the street lent me 4 stands and a bangin jack, so i was all set to go on Wed. UNTIL i was forced to the hospital because of a hernia which led me having to get surgery asap which still leaves a broken down Camaro in my driveway and a small pile of parts. To say im pissed is an understatement. But it will get done once i am able to do so. Not sure when that will be because im in a world of pain right now and these painkillers arent doing *****.

[94Z28BLK]

did they really just a star out that whole word?

[Jersey Mike]

Nope. It's the drugs.




Rest up, man. The car shouldn't take more than an afternoon's time.

[sweetbmxrider]

You can't even say moar on this forum :(

edit: You can!

[8hnpSS]

sounds like things are gettin pretty rough for you man if you need a hand let me know i dont think you can be that far out of the way lol