Pelican Parts Bulletin Boards

Name	Post
dman007	posted 04-21-98 11:12 PM ET I have a 1971 914-6 with a 1971 911E 2.2 motor. The motor is very hard to start and barely idles when the car is cold. After the motor warms up it runs great. What was used on mechanical fuel injection for cold starts?
JP Noonan	posted 04-22-98 05:20 PM ET If your engine is similer to a 79 911 SC then... My friend had a 79 SC that would idle really high, I think above 2000 somewhere. The problem was the auxilary air bypass, I guess it works the same as on a 914 D-Jet by allowing air past the throttle body until warm. He "fixed" this by clamping the hose with vise grips because the bypass is buried so far down in the enginge. The same guy now has a 74 with an 83 Euro 930 motor (grey market, there was not a U.S. 930 in 83. After his motor was rebuilt due to a spun bearing ($$$$$$$) it would start in the morning but was near impossible to restart warm, and it blew huge clouds of smoke when on boost. It would take for ever to warm up but then was fine, except for the smoke. The problem was a fat (rich) mixture. The mechanic that rebuilt the motor hooked the car up to a smog machine and adjusted the mixture. I didn't see how he did it but now the car starts right up every time. Also is it cold outside when you have this problem and what does it do if the engine is already warm? As always check that the ignition is in good shape, I think too much advanced timing could cause your same problem. Buy a shop manual (Haynes) and check it out there are all kinds of things on that engine I'm not familar with (cold start valve? ignition modual?) Check out the 911 forum.
Marc Le Friant	posted 04-22-98 06:16 PM ET If you have an original 914-6 you should have a hand throttle. The MFI 911 cars had this too and I think it was even more necessary for them. Otherwise, both carbed and MFI engines had a "thermo-time switch", which was a sensor with two electrical connections and which was threaded into the breather plate on the early six cylinder engines. Don't really know what its purpose was but if you're really having trouble, check to see if it's connected and functioning properly. Other than that, just use the hand throttle when cold, that's what it's there for.
Wayne at Pelican Parts	posted 04-25-98 02:31 AM ET John is right, the mixture may be the problem. That, or the motor may be acting perfectly normal. The 914-6 hand throttle was put there for a reason; the cars needed more gas/air to warm up on cold starts. Unfortunately, the 1971 motor and the 1979 motor are very different in both smog, displacement, and fuel injection, but the mixture comparison still holds a lot of truth... -Wayne
Dave_Darling	posted 05-20-98 11:52 AM ET I seem to be having some trouble posting this in the other MFI article. But here goes again! I have heard that there might be a maintenance-type pamphlet available from Pacific Fuel Injection in South San Francisco CA. You can call them at 650/588-8880 or fax them at 650/588-2031. I have also heard there might be a similar pamphlet available from a certain mail-order parts outfit in San Luis Obispo CA that deals with German Parts... Apologies to Wayne for mentioning a source other than Pelican. Anyway, good luck with the MFI! I drove one MFI 914 once, and it was a BLAST! --DD