Quote:
Originally Posted by CamelotShadow
EGR was checked by a mechanic & by myself & it opens.
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It needs to open and flow exhaust into the intake. On most cars, manually opening the EGR at idle should stall the motor ( or at least make it run very rough ) If not there isn't enough flow.
Quote:
Originally Posted by CamelotShadow
I did find a cracked red ruv=bber hose connecting it to the egr vac line.
I replaced that.
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Also make sure the EGR opens by vacuum when it should, ( usually part throttle with the engine loaded, just like distributor vacuum advance )
Quote:
Originally Posted by CamelotShadow
The engine does run hot 90C.
I have to call around to see what smog repair shops will be able to diagnosis a 30 yo car.
I'm getting a temp gun.
What kind of operating temps of various componemts should I detect?
Can this help w detecting problems?
NOx seems to be a tricky one for the emissions to handle.
Thanks
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Engine temp is less of an issue, it is high combustion chamber temp that causes high Nox and something you won't be able to measure.
If this car has a 3 way cat it might be failing resulting in high Nox.
I haven't read these but they should apply.
www.magnaflow.com/07techtips/TechBulletin/TB80013.pdf
www.bearriverconverters.com/data/CatOpp.pdf
07-05-2013, 09:15 PM
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