Latest Forum Post
购买英国大学毕业证Q^薇信956290760办理英国切斯特大学毕业证成绩单学历认证,真实可查学历证书,留信认证官网可查,OFFER,病假条,学历证书购买,essay辅导,海牙认证,一个学期成绩单Universi
购买英国大学毕业证Q^薇信95629...
购买英国大学毕业证Q^薇信956290760办理英国中兰开夏大学毕业证成绩单学历认证,真实可查学历证书,留信认证官网可查,OFFER,病假条,学历证书购买,essay辅导,海牙认证,一个学期成绩单Unive
购买英国大学毕业证Q^薇信95629...
购买英国大学毕业证Q^薇信956290760办理英国白金汉大学毕业证成绩单学历认证,真实可查学历证书,留信认证官网可查,OFFER,病假条,学历证书购买,essay辅导,海牙认证,一个学期成绩单Universi
购买英国大学毕业证Q^薇信95629...
购买英国大学毕业证Q^薇信956290760办理英国布鲁内尔大学Brunel毕业证成绩单学历认证,真实可查学历证书,留信认证官网可查,OFFER,病假条,学历证书购买,essay辅导,海牙认证,一个学期成绩
购买英国大学毕业证Q^薇信95629...
购买英国大学毕业证Q^薇信956290760办理英国布莱顿大学毕业证成绩单学历认证,真实可查学历证书,留信认证官网可查,OFFER,病假条,学历证书购买,essay辅导,海牙认证,一个学期成绩单Universi
购买英国大学毕业证Q^薇信95629...
购买英国大学毕业证Q^薇信956290760办理英国布拉德福德大学毕业证成绩单学历认证,真实可查学历证书,留信认证官网可查,OFFER,病假条,学历证书购买,essay辅导,海牙认证,一个学期成绩单Un
购买英国大学毕业证Q^薇信95629...
购买英国大学毕业证Q^薇信956290760办理英国伯恩茅斯大学BU毕业证成绩单学历认证,真实可查学历证书,留信认证官网可查,OFFER,病假条,学历证书购买,essay辅导,海牙认证,一个学期成绩单Bou
购买英国大学毕业证Q^薇信95629...
购买英国大学毕业证Q^薇信956290760办理英国博尔顿大学毕业证成绩单学历认证,真实可查学历证书,留信认证官网可查,OFFER,病假条,学历证书购买,essay辅导,海牙认证,一个学期成绩单Universi
购买英国大学毕业证Q^薇信95629...
购买英国大学毕业证Q^薇信956290760办理英国伯明翰城市大学BCU毕业证成绩单学历认证,真实可查学历证书,留信认证官网可查,OFFER,病假条,学历证书购买,essay辅导,海牙认证,一个学期成绩
购买英国大学毕业证Q^薇信95629...
购买英国大学毕业证Q^薇信956290760办理英国贝德福德郡大学Beds毕业证成绩单学历认证,真实可查学历证书,留信认证官网可查,OFFER,病假条,学历证书购买,essay辅导,海牙认证,一个学期成绩
购买英国大学毕业证Q^薇信95629...
|
|
Guest
Anonymous Poster
Wynlover225@aol.com
Feb 19, 2007, 10:20 AM
Post #1 of 5
(1667 views)
|
My 1992 Plym Acclaim w/2.5L 4 cyl failed emissions insp for NOx reading 1529 on a 970 max std. I replaced cat converter as muffler shop dtermined it to be bad. NOx went down to 1469 still failing. I do not know where to look next. Any ideas?
|
|
| |
|
DanD
Veteran
/ Moderator
Feb 20, 2007, 6:05 AM
Post #2 of 5
(1657 views)
|
Does this engine have and EGR (exhaust gas recalculation) valve? Some did some didn’t in 92 and I can’t remember whether it was the 2.2 or the 2.5 that did? Depending on whether it does or not will determine which way we go to get this thing to pass the NOX. There are ways of sneaking a non-EGR engine through a test if all else fails. Dan. Canadian "EH"
|
|
| |
|
Guest
Anonymous Poster
Feb 21, 2007, 8:35 PM
Post #3 of 5
(1654 views)
|
I think it does (have an egr valve). I was told that the numbers are much too high to be the EGR valve. Do you disagree?
|
|
| |
|
DanD
Veteran
/ Moderator
Feb 22, 2007, 6:27 AM
Post #4 of 5
(1649 views)
|
Do I disagree?? YES! A properly functioning EGR system on an engine running the way it was intended will reduce NOX emissions by at least 50%! The major contributor to the production of NOX (Oxides of Nitrogen or photochemical Smog) in an internal combustion engine, is load and heat. We can’t do a lot about the load on the engine; the engine has to push the car down the road but we can do something with the heat generated during the combustion process and that’s where the EGR system comes in. Basically the EGR introduces inert gases (exhaust) back into the combustion chamber to take up space which in turn will reduce internal combustion temperatures. In other words to help fill up the combustion chamber with something that doesn’t burn. Yes this exhaust gas is hot but nothing compared to the heat generated by the combustion of compressed hydrocarbons and oxygen; again because there’s nothing left in the exhaust gases to burn it has a cooling effect on the over all combustion chamber. When I say a cooling effect I don’t mean that by having an EGR system repaired you’re going to see the engine temperature gauge suddenly drop. That’s because we’re talking combustion temperatures, which the cooling system of the vehicle has been designed to look after via the thermostat. I’m an emissions repair tech here in Ontario’s emissions testing program and I have seen so many catalytic converters condemned when yes they may be on the weak side but would still get the job done if the input gases from the engine were down to an acceptable level. Dan Canadian "EH"
|
|
| |
|
steve01832
Veteran
Feb 22, 2007, 7:34 PM
Post #5 of 5
(1639 views)
|
I have cheated on a few customers' cars by replacing the spark plugs with a colder plug. This is more applicable on cars with over 100000 miles on them. Steve
|
|
| |
|