Re: 89 405 Mi16 - Starting, Idling, Hesitation Problem HELP!

Brian Holm, Peugeotholm (peugeots@plainfield.bypass.com)
Wed, 15 Jul 1998 14:10:34 -0400

To me this sounds more like a fuel supply problem, assuming that your tach
needle is not dropping sharply during the problem episodes. The idle
problem may be the idle air valve, the oxy sensor, or with the higher speed
problems elswhere in the injection system.

Brian

At 06:29 PM 7/14/98 PDT, jackmindy wrote:
>What's the mileage? Sounds like your cat. converter packing it in.?>
>
>----------
>> I have an 89 405 Mi16 which has developed some sort of running problem.
>>
>> Upon cold start, the engine would start on the 1st or 2nd try, but miss and
>> such for 20 seconds or so, then surge to 2000rpm and fall back down to
>> 1200.....idling "smooth" by what the tach said, but the exhaust note told a
>> story of slight missing.
>>
>> When you first pulled away, the car had no power, and for the first 100ft,
>> would hesitate and bog....almost like there was a lack of fuel. Then it was
>> fine.
>>
>> But over the past week or so......it would take 4 or 5 tries to
>> start....each time the car would "start" instantly, then die immediatly. I
>> could speed this process up by priming the gas pedal. (yes..like in a
>> carburated car.)
>> And...when the car finally did start, and was idling terribly, a little jab
>> on the gas pedal would clear it up for 5 seconds or so.
>>
>> It is fairly smooth running at constant speed.....but when you abruptly
>> change throttle..like floor it or something....it will hesitate a
>> little.....almost like it is bogging down or something.
>>
>> If I can at a light, and floor it from a stop...I get surging all the way to
>> redline.....One of out 5 or 8 tries will the car feel like it has full
>> power, I will think the problem is solved, but to know avail.
>>
>> To try and solve this problem, I have installed a new air filter, new plugs,
>> new cap and rotor, new fuel filter, and run a bottle of Techron
>> through.....nothing has helped.
>>
>> I was thinking of getting new spark plug wires.....as well..but that is not
>> what I think this problem is.
>>
>> This sounds fuel pumpish to me? Anyone else concur? Anything else? I
>> have looked through the archives looking for this problem...I have seen
>> someone cleaning out the emissions equipment, someone else fixing a vacuum
>> leak. But I wouldnt think the vacuum leak would hurt anything at high rpm.
>> This problem is all the way through the power band.
>>
>> Thanks in advance!
>> Brian
>> Seattle, WA
>>
>>
>>
>> Brian J White
>> bwhite@thepoint.net
>>
>>
>>
>>
>>
>
>
>
>
Brian Holm, Peugeotholm
Supplying parts for Peugeots only, since 1969
Plainfield, VT 802.454.7132 Fax 454.1310
Alternate E-mail: peugeots@together.net