Stumble w/Throttle

[Phil Rose]

Sounds similar to symptom my '91 200q had all this summer. It finally threw a code indicating a problem with the MAF sensor. I checked all sensor connections and finally removed the sensor and saw a broken wire. I replaced with a used MAF sensor and problem solved.

The temp gauge issue is possibly our old nemisis, the MFTS. That would also affect engine running, but not a stumble problem, AFAIK.

Phil



> On Sep 21, 2014, at 6:12 PM, Kenneth <auditude at cox.net> wrote:
> 
> On, my 200q20v,  I get a stumble if I give it too much throttle too quickly as the rpms rise, if I just give it too much throttle too quickly at a given rpm.
> 
> If I add throttle more slowly this doesn't happen, and it seems like after the stumble it sort of "clears its throat" and the power comes back.
> 
> It's not throwing any codes right now, but earlier, before a dead battery change, I was consistently getting a check engine light and code for "air/fuel ratio out of range."  I can't remember the specific code number or text right now, but I didn't change anything but the battery yet and the CEL hasn't returned. 
> 
> I suspect the symptoms could point to a boost leak.  Is there anything else that could be likely?
> 
> P.S.  Actually another footnote is that my coolant gauge isn't working.
> 
> Thanks,
> 
> Kenneth
> (Sent on a Virgin Mobile Samsung Galaxy S® III)
> _______________________________________________
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