Date: Tue, 21 Jul 1998 17:34:05 -0700
From: Justin VanAbrahams <jvanabranopsamnet>
Subject: Re: dead

Kevin M. Eck wrote: > My 85 900 Turbo 16v died. She harumphed a few times at low RPM...meaning > she bucked like a bronco. At high RPM she ran OK. On a hill she gave up > the ghost. The starter turns. It just seems like it's not firing > right...There is a loose electronic gizmo that should be attached to the > distributor. I think this may be it. Anybody else have this problem? Can > you give me advice? > That little bugger is the connector for the hall sensor... it tells the FI ECU what speed the motor is running at. If it's completely disconnected the ECU won't get a signal and car won't start. If any of it's metal parts are grounded against the distributor's body, it also won't send a signal and the car won't run. To figure out what the problem is, first find out if it's ignition or fuel related, or something else. Remove a spark plug or two along with their wires and put them FAR away from the car. Try and start it. Gas should shoot out (small amounts) from the spark plug hole. You might wanna have a friend watch/smell while you crank. If you aren't getting fuel, you may have a hosed fuel pump or a hosed fuel pump relay. Try this for each cylinder... It could also be a clogged or malfunctioning fuel injector, although this is pretty unlikely. If you are getting gas, then it's probably ignition. Buy a new spark plug (one) plug it into a loose ignition wire, and hold it far away from you with something insulated. Have someone try and start the car. If you don't get any spark, chances are there is something wrong with the wire (a bad wire would cause a no-start situation, and poor running at low speed), the distributor cap, rotor, or the distributor itself. Repeat the same test for each wire, just to be sure. If this all works, try it with your old spark plugs to be sure *they* all work. I am betting you've got bad wires... if this is the case, get new ones. Buy Bougicord wires from the dealership. I'd stay away from the less-expensive and more widely available Bosch wires. Some people will disagree with me, but Magnecor also makes good wires for Saabs... they are about $80 per set (all four) plus shipping. I use Magnecors on my SPG and Bougicords on the two 9000s and the '85 900T. They all run the same, but the Magenecors are thicker and bright red... :) -Justin

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