Date: Thu, 31 Jul 2003 19:40:13 GMT From: Paul Halliday <pjghnopsamyonder.co.uk> Subject: Re: Mixture problems and lumpy idle
in article bgbnrv$l22cm$1nopsam52899.news.uni-berlin.de, Grunff at grunffnopsam.com wrote on 31/07/2003 19:40: > Paul Halliday wrote: > >> The noise is a hissing, almost fizzing noise and from the outside seems to >> be inside the fuel tank. In the boot, I couldn't smell anything and upon >> lifting the sub-floor, the hissing gets much louder. When I got home, I >> unbolted the sub-floor completely and turned the engine on, but the idle is >> spot-on and no hissing. Is this the fuel pump starting to die? > > A gentle hiss is quite normal for the in-tank pumps - two of my > cars have always hissed, but the pumps are fine. > > When they start dying, they make some horrible groaning noises. > You'll know it when you hear it. Okay. When I got home, the hissing was much less so than when I experienced the lumpiness. >> Where would I plumb one in? > > The flexible fuel pipe as it comes into the engine bay, and > joins the fuel regulator. > > >> I'd >> prefer something I can look at all the time, like an in-dash gauge (or maybe >> leave the gauge in the engine bay) - where would be good to put the sender? >> I think the sender would fit into a pipe insert with a UNF type of fitting. >> Bugger, soon I'll have more gauges than Saab's other Aeros :) > > Don't know how common fuel pressure gauges with remote sensors > are. When I measure fuel pressure, I just hook up a regular > pressure gauge with a hose. Not a good permanent arrangement though. I've got an el-cheapo vac and fuel pressure gauge kit with an assortment of fittings, reducers and pipes. I found this very useful for vac and basic boost tests, so I'll have a go with the fuel side of things when I get back from Sweden (going early tomorrow, so packing and brushing up on my "god morgon"s and "hej"s at the moment). Cheers, Paul
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