Date: Sun, 22 Sep 2002 14:41:06 +0000 (UTC) From: "SimonJ" <Menopsam.net> Subject: Re: Checkin SAAB 9000 fuel injectors
"Steven Jack" <mailnopsamaurs.fsworld.co.uk> wrote in message news:amk9lg$f5k$1nopsamg1.svr.pol.co.uk... > Thanks to all the replied before. > The engine runs roughly and idles poorly. Removing number 3 lead from the > plug has no effect all the rest do, though number 2 has less efect than 1 > and 4. > I swapped the plugs and leads around - noeffect. Num 3 plug is clean the > others are all black soot. Number 2 is slightly wet. > Running the engine I can remove injector leads for 2 or 3 with no effect, I > am confused as 2 seems to be burning something to turn the plug black. If I > unplug 1 or 4 the engine dies. Listening to the injectors with the > screwdriver trick gives a very loud tick on 1 & 4 and much quiter on 2 & 3. > Swapping injectors moves the ticking sound but doesn't change the fault > condition i.e. still no effect on idle removing num 3 lead. > According to the manual all injectors fire together, so can I safely swap > the cables between injectors ? > Yes. > Is there any way to test them on the bench, i.e. by supplying a voltage to > them and blowing through them ? > You can test them on the car. Remove them from the manifold, one at a time, place in a glass jar, and check the give a nice even spray of fuel when engine is cranked. CAUTION!!!!!!!!!!!!! This procedure is potentially hazardous, as you are spraying atomised fuel about. Make sure you catch fuel in a jar. Disable ignition system by disconnecting low tension circuit Only perform test on a cold engine Remove any source of flame/spark, do not smoke etc.