engine swap fails emissions “egr valve left unused”??

[dosmastr]

after i did the ignition parts but before I put the GTP in, on hi idle it blew 90ppm HC, and 330ppm HC at low idle. Other readings have never been bad.

Even before ignition overhaul it passed high idle, just passed it better after the replacements. All plugs looked minimally worn and were just like the NORMAL picture in the haynes manual.

odd side note, the pregapped plugs I bought were like 50% off from the hanyes manuals numbers. (they almost matched the plugs I pulled out)

Topic

[dosmastr]

Eric the stop light hates me…. (I’ve hit yes 5 times)

[pcmdjason]

Well in a limited sense some unburnt HC could be reburnt with the EGR installed, but in general it is used to lower the combustion temperature by flowing in noncombustable gasses. Lower combustion temps lower NOx emissions.

Unburn HC would mainly be removed in the catalytic converter. If the cat wasn’t getting up to temp or plugged the HC could be getting through.

[EricTheCarGuy]

Sorry bout that, it seems to have worked however, thanks for using it.

[Author]

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