Why is my throttle acting "governed" post-op?

Gypsy62 · **Posted:** Fri Jan 20, 2017 9:42 am

Testing the throttle-response in "park", it behaves normally up until about 3300rpms and then it hits a hard ceiling. Why?

I'm hoping it's just the ECU defaulting to 'limp mode' while it recalibrates following all the systems being dismantled, but insight appreciated.

joe_ · **Posted:** Fri Jan 20, 2017 1:00 pm

A lot of vehicles these days have a separate, lower rev limiter when the transmission's in park or neutral. Never tried it on a CRD but it could be that.

jws84_02 · **Posted:** Fri Jan 20, 2017 1:27 pm

Might be the inlet air pressure sensor. Check to make sure the small plug on the side of the airbox is plugged in

WWDiesel · **Posted:** Fri Jan 20, 2017 2:29 pm

joe_ wrote:

A lot of vehicles these days have a separate, lower rev limiter when the transmission's in park or neutral. Never tried it on a CRD but it could be that.

You may be right, it could be in the PCM programing... :idea:

Gypsy62 · **Posted:** Fri Jan 20, 2017 4:34 pm

JWS- not sure if anybody has informed you lately, so please permit me: YOU D' MAN!
Thanks!

Plugged-in that pos sensor and sheee-zam! Normal throttle-response, no governor. Hmmm... wonder what else I spaced. Doh!

Plugged-in my OBD to scope codes. Familiar EGR (post-sasq. Pre-GDE) code, also "external air temperature sensor circuit low", and "massive fuel leak" which can't be current.
Loving the post-op idle; only 2rpms of variation, 760-62.
I assume that the ECU requires X cycles and X operating time/distance to fully recalibrate. No?

jws84_02 · **Posted:** Fri Jan 20, 2017 7:22 pm

Why is my throttle acting "governed" post-op?

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