XM not idling hot or cold

Doc · Post by **Doc** » 18 Jan 2003, 20:49

I am at the end of my tether. The 1992 XM 2.1 SED with FSH and 91,000miles has now been on my drive for a week. The problems started as a reluctance to rev over 3000 rpm under load i.e overtaking. It refuses to idle when hot or cold or if it does chug to life then it idles at 700 rpm approx before surging between 700 and 1000 rpm. I have checked the cold start cable and lever and it's in the correct position. It is also surging even when the accelerator is held in a fixed position. If I then let go it idles roughly before stalling.
Yesterday I sealed up a split in the pipe linking the manifold to the intercooler and also repaired the pressure hose linking the pump to the intercooler.
Any solutions/ideas greatfully received before I do a 'Basil Fawty' on it?
Doc

JohnD · Post by **JohnD** » 18 Jan 2003, 23:30

Have you checked that the fuel filter isn't blocked; doesn't contain water in the bottom of the housing and that there are no air leaks in the system.