If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
emissions trouble
I have a 94 sc2 and it has failed the massachusettes emmission test. I've
replace with new the ox sencor and the catalitic converter, it still failed, any suggestions?? |
Ads |
#2
|
|||
|
|||
emissions trouble
On Mon, 27 Nov 2006 10:01:14 -0500, "wastedtallent"
> wrote: >I have a 94 sc2 and it has failed the massachusettes emmission test. I've >replace with new the ox sencor and the catalitic converter, it still >failed, any suggestions?? Failing how?? What are readings? ----------------- TheSnoMan.com |
#3
|
|||
|
|||
emissions trouble
it is reading a high hydrocarbons i don't have thenumbers here but will get
them when i get back home. |
#4
|
|||
|
|||
emissions trouble
In article outautos.com>, "wastedtallent" > wrote:
>it is reading a high hydrocarbons i don't have thenumbers here but will get > them when i get back home. > Hydrocarbons in the exhaust means unburned gasoline. That, in turn, usually means an ignition problem of some sort. Start with the simplest thing: have you replaced the spark plugs, or at least checked them? -- Regards, Doug Miller (alphageek at milmac dot com) It's time to throw all their damned tea in the harbor again. |
#5
|
|||
|
|||
emissions trouble
wastedtallent wrote:
> I have a 94 sc2 and it has failed the massachusettes emmission test. I've > replace with new the ox sencor and the catalitic converter, it still > failed, any suggestions?? You really need to take it to a mechanic that has an exhaust gas analyzer and the proper diagnostic equipment in order to troubleshoot this. You'll spend a fortune replacing parts that don't need replacing, for something that will most likely be something minor like a disconnected hose or wire. Not sure if MA has a "gross polluter" designation, but be careful. In California, if you try to "fix" your emissions problems and make it worse you can end up as a gross polluter and then you're really in for a lot of hassle. What would cost you a couple of hundred dollars in repairs, can end up costing upwards of a thousand dollars. |
#6
|
|||
|
|||
emissions trouble
|
#7
|
|||
|
|||
emissions trouble
|
#8
|
|||
|
|||
emissions trouble
|
#9
|
|||
|
|||
emissions trouble
Yes, I had the same result when the coolant temperature sensor went
bad. Replacing it turned my "Fail" into a "Pass". (I've been through this with both my 94 and 95 SC2 and I've seen this solve two similar problems on this board.) It also made the engine idle at a more reasonable RPM. The sensor resistance was ridiculously high - something like 5 Megohms. It should have been about 50K ohms at freezing, 100 ohms at 100 degrees (something like that, anyway) It caused the engine to think it was running much cooler than it actually was - apparently running rich to "catch up". (Although I am aware that a LEAN mixture raises exhaust gas temperature) You are definately running too "rich" it the test shows excess hydrocarbon emmissions. If this isnt the problem, you've got an injector problem - but I'd bet the sensor is your culprit. They should be available for less than $10. You'll loose coolant in the procedure, so drain it down first. -WaV wastedtallent wrote: > I have a 94 sc2 and it has failed the massachusettes emmission test. I've > replace with new the ox sencor and the catalitic converter, it still > failed, any suggestions?? |
#10
|
|||
|
|||
emissions trouble
In article .com>, "wavy" > wrote:
>Yes, I had the same result when the coolant temperature sensor went >bad. >Replacing it turned my "Fail" into a "Pass". [...] >If this isnt the problem, you've got an injector problem Not so fast there... all it takes is one spark plug firing only intermittently to put a pretty fair amount of unburned gasoline (hydrocarbons) in the exhaust. There are a number of other things that will cause that symptom, too, and to say that if it's not 'A' then it must be 'B' is simply incorrect. -- Regards, Doug Miller (alphageek at milmac dot com) It's time to throw all their damned tea in the harbor again. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
High Hydrocarbons Cause 1989 Oldsmobile to Flunk Emissions Test | Beloved Leader | Technology | 6 | October 8th 06 01:49 PM |
State of Oregon going to self-serve emissions testing for 1996 and newer models | Ted Mittelstaedt | Technology | 8 | September 21st 05 05:16 PM |
Update on Arizona Emissions Bill! | Laurie S. | Ford Mustang | 3 | March 11th 05 06:32 PM |
California Emissions for 2000 Ford(49state) HELP! | TheSmogTech | Technology | 0 | January 31st 05 11:23 PM |
Drive Clean, old A2s, and NOx emissions | Garry Tarr | VW water cooled | 1 | November 9th 04 12:18 PM |