Yup...letting it idle for too long actually cools the cat down. Part of the
test is to run the engine at 2500rpm for 2-3 minutes to allow for complete
system warm-up (cat mainly but also to put the older systems into closed
loop operation).
If all maintenance was done properly and it still didn't pass, what were the
actual readings on the CO, O2, CO2, HC, and NOx?
- Bernd
-----Original Message-----
From: Rick Barnes [mailto:rascal@scrtc.com]
Sent: Saturday, January 05, 2008 11:13 PM
To: dakota-truck@dakota-truck.net
Subject: DML: RE: attn Jason. pass emisions test
You have to get that cat nice and hot
-----Original Message-----
From: owner-dakota-truck@bent.twistedbits.net
[mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of
knox.james@sympatico.ca
Sent: Saturday, January 05, 2008 11:08 PM
To: dakota-truck@dakota-truck.net
Subject: DML: attn Jason. pass emisions test
With my 91 Dak 318 LA, eng temp had to be raised, 195 stat, oil change
prior, 94 octane, highway run and directly on to emisions dyno at Dodge
Dealer. High eng temp was vital as per mech's advice.
Jim, 91 Dak
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