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Hesitation when accelerating.

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Old Jul 15, 2024 | 01:27 PM
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Lightening Rod
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Will do thanks. I tested the CPVS or Cannister Purge Valve Solenoid Diaphragm this morning again, NO PULSE. I called a local mechanic who I've been using for 20 years and he actually was able to speak to me for 5 minutes and he said the CPVS does pulse when working correctly. I went ahead and changed it. With the new CPVS the O2 sensors increased dramatically in voltage, B1 from normally .1 to .9 to .3 to .98. B2 went from a steady 18 to 20 to a steady 40 on initial startup. I ran it at idle to 2000 for about 10 minutes and the o2 sensor B1 normalized at .1 to .8+ and o2 B2 normalized at about .20 and steady.

The SHRTFT and LNGTFT both also dramatically changed in the opposite direction of where they were before the part change, upon startup I was seeing shrtft +9 to -.3 , longft same thing, +9'ish, saw +14 a couple times after part change; then it all seemed to normalize looping much closer to zero. I believe I need to road test it.

Still runs rough. I'm going to put a vacuum gauge on the new part and see how it behaves with motor running.

Your feedback is welcomed and appreciated.

Thank you in advance.
 
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