Date: Sat, 27 Oct 2007 15:34:36 -0700 From: PJGH <pjgh93nospamlemail.com> Subject: Re: C900, running miserably...
On Oct 27, 4:14 pm, charlieonthera...nospaml.com wrote: > On Oct 25, 4:34 am, Adrian <toomany2...nospaml.com> wrote: > > > > > John B (John B <rotten_NOSP...nospam.org>) gurgled happily, sounding much > > like they were saying: > > > >> i'm hoping that the guy i had look at it checked all the usual > > >> suspects. he had it for two weeks straight, after all... i'm thinking > > >> it's an air/vacuum issue of some sort, but i clearly know nothing... > > >> thanks for your suggestions! > > > I could be wrong, but I think an air leak would trigger a CEL. Easy > > > enough to test... > > > Not necessarily. > > > Replacing all the vac hoses with nice shiny new silicon is cheap and > > easy, and will solve a LOT of miserable running - especially at idle. > > > When I got mine, one of the hoses was a bit split at the join on the > > inlet manifold. Ran OK, but smelt badly of fuel. After a long fast m'way > > run, it spat another few hoses off various connectors - miserable idle, > > stalling. Still no CEL. I've just had one of the connectors on the valve > > cover break (previously glued), and that didn't seem to affect very much > > - apart from, again, a fuelly smell. > > > None caused a CEL. > > thanks for all the input. i just picked her up from a very reputable > shop. while the poor acceleration problem was fixed (by overhauling > plugs, wires, filters, etc.), it still idles rough. i'd take it back, > but i'm tapped out financially. > i've done no under the hood work beyond changing batteries. is > replacing vacuum hoses difficult? Nope ... just buy 5 metres of 3mm bore silicon and replace each hose in turn with a new piece of the correct length. With regard to the CEL ... on the Lucas CU powered C900s from 1990 (we got those over here in Europe ... the US continued with Bosch LH) there are a number of faults that will not throw a CEL, like "too rich" ... "too lean", etc. If that is the case for the Bosch ECU as well, then get it checked and pull any fault codes. Also, I gather until all the fault codes are read (and cleared), the engine will continue to run in a "limp" mode ... that may just be a Lucas thing, though. So, read (or have read) the fault codes, pull the battery connection to reset the ECU, replace vac lines and hope for the best. One quick and easy way to chase down vacuum leaks is to buy a can of carburettor cleaner, run the engine up to warm and then with the engine running, spray carb cleaner onto various air hose connectors. If the engine pitch changes ... there's your leak. HTH, Paul
