Lower idle revs
Thread Starter
Cobra R Member
Joined: March 6, 2004
Posts: 1,517
Likes: 0
My car used to idle at 1300 RPM until warm , then it would settle around 900 RPM.
Without the HC trap it now idles at 600 RPM. Any one else experience the same
drop?
The eco cops are causing us to waste fuel, AGAIN!
Without the HC trap it now idles at 600 RPM. Any one else experience the same
drop?
The eco cops are causing us to waste fuel, AGAIN!
Legacy TMS Member
Joined: June 23, 2004
Posts: 2,147
Likes: 9
From: Pittsburgh, PA
I'll check mine on the way home. I can't remember where it idled before. I don't understand the benefit, if there is a better gas mileage without it. I guess they think there is a trade-off somewhere.
Waste more fuels, but have cleaner air. Heck, there is probably more air pollution by refining the additional gas spent to use the filter.
I don't know, higher MPG and HP, I will vote for that.
Waste more fuels, but have cleaner air. Heck, there is probably more air pollution by refining the additional gas spent to use the filter.
I don't know, higher MPG and HP, I will vote for that.
GT Member
Joined: November 28, 2004
Posts: 181
Likes: 1
Culled From Here
Hydrocarbon Traps
Hydrocarbons produce 70 - 90% of total tailpipe emissions during cold start.[20] Recalling that 80% of all emissions occur during cold start, it is thus very important to decrease hydrocarbons. HC traps consist of a substrate material covered with zeolite. During cold starts the zeolite has an affinity for HC and will absorb them until the trap reaches approximately 302EF near 20 seconds after a cold start. At this temperature, the HC are released into the catalytic convertor for oxidation. This suggests that the coupling of an HC trap with an EHC will produce very beneficial results. Such a system was constructed for the 3.1 liter V6 tested, however time was prohibitive in determining the effectiveness of all components. The entire system is displayed in Figure 19.
Hydrocarbons produce 70 - 90% of total tailpipe emissions during cold start.[20] Recalling that 80% of all emissions occur during cold start, it is thus very important to decrease hydrocarbons. HC traps consist of a substrate material covered with zeolite. During cold starts the zeolite has an affinity for HC and will absorb them until the trap reaches approximately 302EF near 20 seconds after a cold start. At this temperature, the HC are released into the catalytic convertor for oxidation. This suggests that the coupling of an HC trap with an EHC will produce very beneficial results. Such a system was constructed for the 3.1 liter V6 tested, however time was prohibitive in determining the effectiveness of all components. The entire system is displayed in Figure 19.
Mach 1 Member
Joined: July 11, 2004
Posts: 658
Likes: 0
Fleasome-
That's a HC trap using the same technology, but used on the exhaust. The one we are removing is on the intake to capture vapors due to injectors having blasted a bit of fuel into the intake during engine shutdown.
That's a HC trap using the same technology, but used on the exhaust. The one we are removing is on the intake to capture vapors due to injectors having blasted a bit of fuel into the intake during engine shutdown.
Thread Starter
Cobra R Member
Joined: March 6, 2004
Posts: 1,517
Likes: 0
It must of been because of the really cold weather around here lately, but it now idles at around 750 too. So you get it to idle less 150 rpms. This means all kind of things besides better mpg. One thing that comes to mind would be wear and tear on the engine itself would be less.
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