Date: 31 Jul 2003 07:42:27 -0700 From: alancemornopsamo.com (Lance Morgan) Subject: Re: Mixture problems and lumpy idle
Paul Halliday <pjghnopsamyonder.co.uk> wrote in message news:<BB4EB31D.815B%pjghnopsamyonder.co.uk>... > in article 2a52f3e9.0307302320.6aac2fb1nopsaming.google.com, Lance Morgan at > alancemornopsamo.com wrote on 31/07/2003 08:20: > > <snip>PH idling/mixture issues</snip> > > > Is this K-Jetronic fuel management (discontinued in the USA in 88, IIRC)? > > It is. > > > Do you have an O2 sensor (which can provide w/warm idle mixture info)? > > I don't think so. I'm thinking of fitting an air/fuel gauge if I can find > one I like, or get a recommendation. > > > And the overheating hasn't reoccurred since bleeding the system? > > No. And yes - when sitting in traffic jams with high outside temperatures, > but that's understandable :) > > I think the over-heating was down to the throttle dashpot holding the > throttle plate open too much, which is now sorted. It's just a bit lumpy now > and poor mixture when warming up. I think Grunff and Carl have pointed me to > the most obvious cause of these problems. > > Thanks, > > Paul It sounds like maybe you're describing running hot vs overheating (the latter being an immediate concern)? The Cold Start Valve/Injector will be the only (solenoid) injector w/elec wires running to it (tests in Haynes) Other suggested items to ck (sorry! ...most can be tested per Haynes DIY) would be the thermotime switch, intake leaks, failing warm-up regulator, a binding or dirty fuel distrib plunger, air-flow sensor rest position, aux air valve, carbon deposits, binding throttle cable, and dirty mechanical fuel injectors (the pintle style are somewhat prone to this) An exhaust gas analyzer would nail down any mixture problem, if need be http://www.students.tut.fi/~hezekiel/bosch.htm http://www.volvoclub.org.uk/k_jetronic3.htm
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