LS1 99 Camaro Sputtering
#1
TECH Resident
Thread Starter
iTrader: (1)
Join Date: Jul 2009
Location: Tampa
Posts: 757
Likes: 0
Received 0 Likes
on
0 Posts
LS1 99 Camaro Sputtering
When I first bought the car about 2 1/2 years ago it would very very rarely skip and sputter under light throttle. Just recently since I cleaned my air filter and checked the MAF sensor to make sure there was no garbage in it and i cleaned it out.
Later that day I was driving a good distance from my house about 40 miles and it started acting really funny. i know the wave plate in the trans needs to be replaced but I dont think it would cause this issue.
When I give it light throttle it just sputters and acts like too much fuel is being dumped in. When I give it over half throttle it acts like nothing is wrong at all. but when i let out of it it and give it light throttle it starts doing it again. When it first started doing this I would give it over half throttle and it would clear up and then when I drove normal it had no problems. It has now gotten worst. I just wondered if anyone had any ideas besides spark plugs or wires or O2 sensors. If that's what you think it is please let me know. Thank you.
Later that day I was driving a good distance from my house about 40 miles and it started acting really funny. i know the wave plate in the trans needs to be replaced but I dont think it would cause this issue.
When I give it light throttle it just sputters and acts like too much fuel is being dumped in. When I give it over half throttle it acts like nothing is wrong at all. but when i let out of it it and give it light throttle it starts doing it again. When it first started doing this I would give it over half throttle and it would clear up and then when I drove normal it had no problems. It has now gotten worst. I just wondered if anyone had any ideas besides spark plugs or wires or O2 sensors. If that's what you think it is please let me know. Thank you.
#3
Staging Lane
Join Date: Jan 2009
Location: Livermore,Ca
Posts: 98
Likes: 0
Received 0 Likes
on
0 Posts
I had similar issues as you on my 99 too but @96k tho..
thought my fuel pump took a shyt on me..
at first I did the same thing as you still nothing fixed that sputter issue.
I changed plugs,wires and fuel filter fixed my problem
https://ls1tech.com/forums/sponsor-s...ngk-plugs.html
thought my fuel pump took a shyt on me..
at first I did the same thing as you still nothing fixed that sputter issue.
I changed plugs,wires and fuel filter fixed my problem
https://ls1tech.com/forums/sponsor-s...ngk-plugs.html
#6
TECH Resident
Thread Starter
iTrader: (1)
Join Date: Jul 2009
Location: Tampa
Posts: 757
Likes: 0
Received 0 Likes
on
0 Posts
Update on the situation. I looked at my airlid and found the wiring harness that plugs into the drivers side was a little loose so I plugged it back in and my hard shifts automatically went away. That was a relief. Now what it does is when the car has cooled off and I go to drive after a certain amount of time it just feels like it is being flooded with fuel. After I drive a couple miles it clears up and I have no more problems what so ever. The engine light flashes when I do this as well and then when it clears up the engine light quits flashing. But it acts like it never happened. IDK what it is just runs like crap for that short period of time. I dont think it would be O2s because wouldn't it happen all the time?
#7
TECH Resident
Thread Starter
iTrader: (1)
Join Date: Jul 2009
Location: Tampa
Posts: 757
Likes: 0
Received 0 Likes
on
0 Posts
Still no luck...anyone else have any ideas.
Still the same exact way... drive it down the road everything is beautiful then it just starts running like total crap skipping and shuddering...then it clears right up like nothing is wrong and won't do it again until the vehicle cools off and starts to be driven again.
Still the same exact way... drive it down the road everything is beautiful then it just starts running like total crap skipping and shuddering...then it clears right up like nothing is wrong and won't do it again until the vehicle cools off and starts to be driven again.
Trending Topics
#8
Banned
iTrader: (2)
Still no luck...anyone else have any ideas.
Still the same exact way... drive it down the road everything is beautiful then it just starts running like total crap skipping and shuddering...then it clears right up like nothing is wrong and won't do it again until the vehicle cools off and starts to be driven again.
Still the same exact way... drive it down the road everything is beautiful then it just starts running like total crap skipping and shuddering...then it clears right up like nothing is wrong and won't do it again until the vehicle cools off and starts to be driven again.
.
#9
TECH Resident
Thread Starter
iTrader: (1)
Join Date: Jul 2009
Location: Tampa
Posts: 757
Likes: 0
Received 0 Likes
on
0 Posts
You said you cleaned the MAF out.....what do you mean? Did you touch the inside tiny wires of the MAF? You may have damaged it. And if this problem only happens when the engine is cool (not up to operating temp) thats when the MAF is running things. After the engine reaches or gets close to operating temp, the MAF turns off and does not come back into play until you go WOT. Or, another cold start.
.
.
#10
Banned
iTrader: (2)
I appreciate your response. I know I was very careful when cleaning it to not touch them. Let me ask you this though. If it is running really bad and I give it over half throttle and the computer tells the transmission to downshift it runs great. Anything close to flooring it it it doesnt run bad but light acceleration it is fine. I appreciate your help again
Can you go somewhere to get it scanned while the engine is running to see how the 02 sensors are switching?
Another thing that causes partial throttle power issues is clogged fuel filter or dirty fuel injectors. Under heavier throttle though, those clogs can be overcome by increased pressures.
.
#11
TECH Resident
Thread Starter
iTrader: (1)
Join Date: Jul 2009
Location: Tampa
Posts: 757
Likes: 0
Received 0 Likes
on
0 Posts
Im having the car scanned today to tell me what the issue is and im hoping it will pinpoint 02 sensors. I had my car on my lift the other day and noticed that I still have 4 02 sensors on my car. I have no cats at all and long tubes.
Main question is are all 4 of the 02 sensors going to be the same or the 2 in front different from the 2 in the rear? Also is there any kind of dummy plug I could put in place to make the computer think I am running the 2 rear 02's ??? What did you guys do to delete the rear 02 sensors. And can I run the dummy plug for all the 02's
I appreciate the help
Main question is are all 4 of the 02 sensors going to be the same or the 2 in front different from the 2 in the rear? Also is there any kind of dummy plug I could put in place to make the computer think I am running the 2 rear 02's ??? What did you guys do to delete the rear 02 sensors. And can I run the dummy plug for all the 02's
I appreciate the help
Last edited by Docrocket1967; 04-21-2011 at 11:38 AM. Reason: Forgot something
#12
I am also having a sputter problem with my ta it is a 99 it has headers exhaust intake i just put new wires plugs and fixed the vacumm leaks it still sputters i also changed all o2 sensors it says it is running to lean i also replaced the fuel filter and air filter i am stumped with this i can not figure out what is causing this sputter any ideas that could help me out would greatly be appreciated i also checked all fuses.
#14
TECH Apprentice
iTrader: (7)
Join Date: Sep 2010
Location: Nashville, TN
Posts: 343
Likes: 0
Received 0 Likes
on
0 Posts
Im having the car scanned today to tell me what the issue is and im hoping it will pinpoint 02 sensors. I had my car on my lift the other day and noticed that I still have 4 02 sensors on my car. I have no cats at all and long tubes.
Main question is are all 4 of the 02 sensors going to be the same or the 2 in front different from the 2 in the rear? Also is there any kind of dummy plug I could put in place to make the computer think I am running the 2 rear 02's ??? What did you guys do to delete the rear 02 sensors. And can I run the dummy plug for all the 02's
I appreciate the help
Main question is are all 4 of the 02 sensors going to be the same or the 2 in front different from the 2 in the rear? Also is there any kind of dummy plug I could put in place to make the computer think I am running the 2 rear 02's ??? What did you guys do to delete the rear 02 sensors. And can I run the dummy plug for all the 02's
I appreciate the help