Date: Thu, 31 Aug 2000 15:19:34 GMT From: Ken Washington <kenwashinopsamhlink.net> Subject: Re: FI problem
Keith, if yours is an 89 900S, you will just have tee for the crankcase vent from the valve cover to the throttle body. If you had a turbo, you would have throttle bypass valve. I had an 87 900S and I have an 87 9000S, both 16V. Check your hose connections at the throttle body. I put clamps on the larger hoses on my 87 9000S. It helped, because there was a slight leakage going on. What type of plugs are you using. If you are using NGK plugs, check your gap. It should not be more than .028. The previous owner had NGK BCP6ES plugs in my 9000. I switched to Bosch Platinum single electrode and now run the Bosch +4 plugs. The part number for non-DI Saabs is 4418. The other thing is giving your throttle body a thorough cleaning.. Ken Washington 87 9000S 87 900S 83 900T Keith Grider wrote: > Group, > > I have an '89 900. It has a 16V with the LH2.4 Fuel Injection and the EZK > ignition. Until it is warmed up, I get a distinct lag during acceleration at > part throttle. At full throttle, it seems to be fine when cold. After it is > warmed up, it has good power with no lag. > > what I have checked: > The codes from the LH system are 12111 and 12114. I have been over it many > times and have found no vacuum leaks. I replaced the large diameter hose > from the valve cover to the throttle body (crankcase vent) as it was hard. I > have sprayed carb cleaner all over and individually tested each other vacuum > line (even the brake booster and charcoal canister) and found no vacuum > leaks. All electrical connectors are clean and seem to make good connection. > I have checked the NTC sensor (temperature) and it seems to be in the right > range when cold and hot. I have replaced the o2 sensor and verified that it > gets voltage at the connector when disconnected and that the voltage does > swing between 0.2 and 0.7 while idling. I verified heater voltage and > continuity (for the o3 sensor). It has a new fuel pump. I verified that the > fuel pressure is 3 bar in the header with the vacuum line disconnected to > the pressure regulator and slightly lower when the vacuum line is connected. > I have verified operation of the Air mass meter and get ~2V at idle and it > increases with engine speed. AIC operates freely. I did clean it and used a > drop or 2 of synthetic lube on the plunger (solenoid type). It idles about > 900rpm and has a drop in speed when the fans kick on but it comes right back > up to 900. A/C on maintains 900rpm as well after an initial drop in speed. > Plugs are gapped, wires, cap and button are in good shape. > > I don't have much more hair and would like to know if there is anything left > to check. I want to exorcise the codes from the system and get rid of this > lag when cold. > > Question: > Is the Crankcase Vent fitting supposed to be a valve or is it just a tee. > Mine is a tee. There is no valve or orifice in mine. It is a clear flow for > the large diameter hose as well as the small vacuum line. > > any takers? > > Keith Grider > > for off list responses, my email is keithathallidaytechdotcom
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