|
02-05-2007
|
#1 |
Join Date: Feb 2006
Location: Tulsa, OK
Posts: 8
|
Popping Sound
My '91 Z has a popping sound coming out of the exhaust at idle. I don't have a service manual so I was wondering if anyone could help me out? It is a slight sound and only occurs when engine is warmed up. I am not showing any codes and everything works. It seems as if it is only performing at about 95%. I'd appreciate any help.
__________________
All cars, none a trailer queen. |
|
|
|
02-05-2007
|
#2 |
  
Join Date: Jun 2005
Location: pittsburgh
Posts: 4,632
|
Re: Popping Sound
could be leaking injectors. how many miles on the car? stock injectors?
__________________
It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B" |
|
|
|
|
02-05-2007
|
#3 |
|
Join Date: Feb 2006
Location: Tulsa, OK
Posts: 8
|
Re: Popping Sound
They are stock injectors and it only has 28,000 miles.
__________________
All cars, none a trailer queen. |
|
|
|
|
02-05-2007
|
#4 |
|
Join Date: Aug 2005
Location: Iuka, Mississippi 38852
Posts: 756
|
Re: Popping Sound
read the plugs yet?
|
|
|
|
|
02-05-2007
|
#5 | |
|
Join Date: Feb 2006
Location: Tulsa, OK
Posts: 8
|
Re: Popping Sound
Quote:
__________________
All cars, none a trailer queen. |
|
|
|
|
|
02-05-2007
|
#6 |
 Join Date: Jul 2004
Location: Sudbury, Ontario. Canada
Posts: 1,540
|
Re: Popping Sound
He means have you pulled the spark plugs to see if any is showing signs of fouling etc. which could indicate a cylinder wasn't firing properly or something like that. There's a good explanation here -
http://www.nightrider.com/biketech/spkplghnbook.htm#We
__________________
1991 #1516 Black/Black davidmkelly.com Author of fast-paced, sci-fi thrillers. |
|
|
|
|
02-05-2007
|
#7 |
Join Date: Sep 2006
Location: lone pine and mammoth lakes
Posts: 1,407
|
Re: Popping Sound
Reading the plugs will give you an Idea of the fuel mixture. what you dont want to see is litle dark specs on the porcelin . that means its detonating . those little specs are little bit of piston. Don't worry to much it sound scarier than it is . Ck your fuel pressure to see if its within spec when you floor it . You can get a gauge with a long enough hose and tape it to the windshield. go find a safe place to get on it have a buddy sit in the passenger seat and read the gauge. i believe it should be between48-55 lbs, but check your manual to be sure. hope that helps.
|
|
|
|
|
02-06-2007
|
#8 |
|
Join Date: Feb 2006
Location: Tulsa, OK
Posts: 8
|
Re: Popping Sound
Thanks for all the help guys. I believe the plugs are the cause but I am going to check the rest. Its supposed to get up to 60 degrees today, so the girl and I are going to take Z out for a drink this evening. Thanks again.
__________________
All cars, none a trailer queen. |
|
|
|
|
02-07-2007
|
#9 |
|
Join Date: Aug 2005
Location: NY
Posts: 143
|
Re: Popping Sound
Popping sound is usually an over rich condition. Probably caused by too much fuel, but can be an electric deficiency such as not burning all fuel.
Injector check would be my first priority. Possible small leak from one to a few.
__________________
Mike 427 cu in LT5 [URL="http://zr1mk.weebly.com"]http://zr1mk.weebly.com[/URL] |
|
|
|
|
02-08-2007
|
#10 |
|
Join Date: Aug 2005
Location: Iuka, Mississippi 38852
Posts: 756
|
Re: Popping Sound
meaning if you find a wet plug= Bingo, theres the problem.
|
|
|
|
 |
| Thread Tools | |
| Display Modes | |
|
|
Linear Mode
