Date: Fri, 26 Nov 1999 21:50:21 -0600 From: "Earl Carter" <ppl_eacnopsam.edu> Subject: Re: 1986 Saab 900S Cold Starting Problem
My car is a 16 valve non turbo and does not have CIS type injection but later generation electronic with Mass air sensor and a (I don't know what else to call it) auxillary air valve. I will look at it closely again in the morning but I have not located a "Cold start " injector on this engine. I am very familar with CIS type fuel injection as I have been fooling around with water cooled VWs for a long time. <malcolm532nopsameja.com> wrote in message news:81jocj$qu9$1nopsam1.deja.com... > In article <81i84n$dk7$1nopsamews.shsu.edu>, > "Earl Carter" <ppl_eacnopsam.edu> wrote: > > I have a 1986 900S which I love. I would love it even more however if > I > > could figure out why it is so difficult to start when the weather > turns > > cold. I would greatly appreciate any help anyone may be be willing to > > provide with regard to this > > > > > Earl, > I am assuming that it has fuel injection, Bosch K type IE it has a fuel > distribution unit and air flap box on the RHS of the engine bay looking > from the front. > Try checking the following...... > > DO SECOND PARAGRAPH FIRST THEN THIS ONE (I never think logically!!!) > On the inlet manifold by the throttle body is an injector with a blue > body. When the car is cold unbolt it and place the nozzle in a clear > container - milk bottle or similar. Get somebody to crank the car over > on the starter motor. You should see a fine spray of petrol. If yes > than thats the cold start system ok and the problem lies elsewhere if > no then.... > > Replace and check the connection to the injector. Use a volt meter > across the plug connector and again get someone to crank the car. If > you get 10-12 volts then the chances are that the injector is blocked > or has failed. Double check by doing paragraph above.. > > If the voltage is low or none existant then the circuit is not working > properly. > > Next check the coolant temperature sensor. THere are two on the engine, > a small one under the thermostat (For the dash guage) and a larger one > near the top. The large one is used as a type of "on/off" switch for > the cold start system. Make sure the contacts are clean. Check the > resistance of this when the engine is cold, then check it when it is > hot they should be different like afew ohms to lots and lots of ohms (I > can check on my car later and repost). If it has failed it will think > the engine is "warm" > > Finally bolted to the thermostat housing is the fuel pressure > regualtor, two black pipes going to it and a Bosch type connector. > Check the resistance of this, Low ohms indicated the circuit is intact. > High suggests its burnt out or has dirty contacts. This regulates the > volume of flow dependent on temperature and time. Theres a bi-metal > strip inside it. > > Make sure all the connections are clean and dry too as muck gets into > them eventually. > > Hope that helps, if I think of anything else or get more info for you > I'll post again. > > PS If your engine uses L-Injection IE next generation (uses > electrically operated injectors)and or it's a 16v the checks are > basically the same Check the cold start injector and the temperature > sensors, there is no electrical pressure regulator. > > Good Luck, > Malc > Scotland. > > > > > > > > > Sent via Deja.com http://www.deja.com/ > Before you buy.
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