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Registered
Join Date: Jan 2007
Location: near Santa cruz, ca
Posts: 1
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CIS fuel injection
Have a bouncing/bucking problem with 74 911S. Car has 220,000, engine bout 110,000, fuel distributor and injectors about 80,000. New OEM plug wires, rotor and cap. Pentronix our, new points in. third mechanic replaced cold start regulator, then about 90% of the problem went away. Still bucks/ bounces intermittent, but now car is drivable. Next is injectors and distributor.
I pulled injector to test spray, no fuel with ignition on, or with engine running. I am stuck here. Working alone. Help is needed and appreciated. |
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01-13-2007, 05:59 PM
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Registered
Join Date: Jun 2004
Location: Rio Rancho, New Mexico
Posts: 1,325
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Bill,
Sounds like you found the problem. At least one of the problems. You test injectors the same way you check plugs. You have checked one, it was not flowing. So you have a five cylinder engine. Maybe a four cylinder engine. Chevron Techron has been a great injector cleaner for years. Fuel injection specialists call it a "tune up in a bottle". Add it to a fuel tank under 1/4 full and drive for 50 miles. You can also switch injectors to verify if it's an injector problem or something in the fuel distributor. Post a picture when you have time. Good luck,
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DOUG '76 911S 2.7, webers, solex cams, JE pistons, '74 exhaust, 23 & 28 torsion bars, 930 calipers & rotors, Hoosiers on 8's & 9's. '85 911 Carrera, stock, just painted, Orient Red |
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01-13-2007, 08:37 PM
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