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Won't run after fuel leak fire MFI Webers
Looking for last ditch help. A few months ago I put MFI back on my '69 E and it ran sporadically good and bad. While moving across town to new home the car lost power due to fuel leak from MFI line and had fire on heat exchangers. No damage or fire above engine tin on top half of engine or electrics.
After replacing line vehicle started but would only run at half throttle turning over +/- 900 rpm. If you gave it any more throttle it would bog down and die. I have now replaced all MFI back to Webers that were working perfectly when removed but have similar half throttle 900 rpm issues. What have I done???? More importantly, how do I get this car back on the road? Fuel delivery is good. Other than that I can't find a thing amiss. Coil issues? I have Pertronix. Thanks, Matthew
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Matthew - drove Nurburgring with wipers on and no rain 1969 911E SOLD  2002 996 Cabrio 1995 993 Carrera 4 SOLD 2004 Land Rover Discovery II G4 Edition (Sold )
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09-15-2013, 03:57 PM
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fuel spark air
the engine sounds like it is starving for fuel as you have spark and combustion.
did you check your fuel filter? To me something is restricting your fuel flow. you have enough to run the car but not enough to increase the speed.
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1975 911S Targa Silver Anniversary Edition |
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09-15-2013, 04:09 PM
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Plenty of fuel. I've pulled off lines and checked amount at pump and before carbs.
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Matthew - drove Nurburgring with wipers on and no rain 1969 911E SOLD 2002 996 Cabrio 1995 993 Carrera 4 SOLD 2004 Land Rover Discovery II G4 Edition (Sold )
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09-15-2013, 05:23 PM
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Join Date: Mar 2010
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I'm going to assume that your using the MFI specific electric fuel pump and not the same one you had running the carbs?
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1973 Coupe Projekt X (AKA bunch o' boxes full of parts) |
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09-15-2013, 06:51 PM
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ROW '78 911 Targa
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If fuel delivery is good, that leaves spark and compression to deal with.
Are you getting a food strong spark? Put a timing light on each spark plug wire and check all are good. |
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09-15-2013, 07:04 PM
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Will check plug wires next.
Using MFI specific fuel pump but switched back to carb type pump when put carbs back on car. thanks.
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Matthew - drove Nurburgring with wipers on and no rain 1969 911E SOLD 2002 996 Cabrio 1995 993 Carrera 4 SOLD 2004 Land Rover Discovery II G4 Edition (Sold )
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09-16-2013, 04:54 AM
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Join Date: May 2004
Location: New Hampshire
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 Only half throttle w both systems........... Ck fuel supply under load. Look at the screen in the fuel tank outlet. Sometimes this gets partly blocked to allow only enough fuel to run at low speeds. Once under way or more throttle is applied it runs out of fuel & dies. Just my 2 cents worth of advice. Len
Last edited by BoxsterGT; 09-16-2013 at 05:06 AM.. |
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09-16-2013, 05:04 AM
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sounds like fuel deprivation to me too.
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1975 911S Targa Silver Anniversary Edition |
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09-16-2013, 07:55 AM
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Location: Cape Vincent, NY
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Float level and pressure check too. But fuel strainer sounds most likely.
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1968 911S "Leona" Air goes in and out, blood goes round and round, any variation on this is a bad thing. |
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09-16-2013, 09:21 AM
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It was melted Pertronix. When I removed the round pickup it came apart and the other piece had a grove melted into it. Replaced with new unit from Pelican and started right up.
Thanks to all that responded
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Matthew - drove Nurburgring with wipers on and no rain 1969 911E SOLD 2002 996 Cabrio 1995 993 Carrera 4 SOLD 2004 Land Rover Discovery II G4 Edition (Sold )
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09-21-2013, 05:33 PM
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ROW '78 911 Targa
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Good find, no spark....
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09-21-2013, 05:40 PM
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Heinz
