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Old 03-05-2008, 06:28 AM   #1 (permalink)
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I have a 88 festiva ( first one )with a 92 motor I was told but it is not fuel injected, The mechanic put a carb.on it. I get 43 MPG. It runs good if it is not raining but as soon as it rains It starts fouling spark plugs.( Fuel Fouled ) I can only drive it approx. 15 miles and I have to pull over to change them out. I have replaced the rotor, cap and put on the best set of plug wires NAPA Auto has, and it has not helped any. The choke is always full open when it bogs down when I change the plugs. What is going on? I would appreciate any help any one can give me. The MPG is excellant and I would like to get it road worthy. Thanks Don
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Old 03-05-2008, 06:48 AM   #2 (permalink)
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What brand of plugs are you putting in?
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Old 03-05-2008, 01:07 PM   #3 (permalink)
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Started out with Bosch platinum R3 double fire then I tried Motor crafts AGD32C's I also have used a set of Bosch plantinums single fire. Thanks for reply jonmark1985
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Old 03-05-2008, 04:47 PM   #4 (permalink)
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Quit doing the Bosch thing.

Does your distributor have some sort of vacuum advance?
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Get ready for the 351 boss build this summer, 4v closed chamber heads, 2.25/1.75 valves, .750 lift, 12.5:1 piistons, wieand tunnel ram, nitrous, I think its gonna roar!
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Old 03-07-2008, 03:52 PM   #5 (permalink)
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Yes it has a vacuum advance 2 lines connected to the distributer and I checked the diaphram to see if it would move but it would not,when I went to get a used dist. the man there said just to advance it a little bit.and with the higher then normal Idle i just figured the privous owner already did it. I have not checked the timing........ Sorry so long winded
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Old 03-07-2008, 03:56 PM   #6 (permalink)
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What do think about the Motorcraft plugs? Should I go to alittle hotter plug? Thanks
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Old 03-07-2008, 06:29 PM   #7 (permalink)
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You should stick with the Motorcraft plugs that were OE. The ignition system is designed around the plugs that way you get optimum spark. Did you have this problem prior to changing the carb?
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Old 03-08-2008, 06:11 AM   #8 (permalink)
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The Carb was already on it when I bought it, And it has been fouling plugs when its wet outside since I have put it on the road. I put it in my shop one day, started it and with a spray bottle wet everything down that could be reached and it did not do anything. Thanks for the reply
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Old 03-08-2008, 06:20 PM   #9 (permalink)
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Is the carb computer controlled? Does it have a MAP sensor.
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Get ready for the 351 boss build this summer, 4v closed chamber heads, 2.25/1.75 valves, .750 lift, 12.5:1 piistons, wieand tunnel ram, nitrous, I think its gonna roar!
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Old 03-11-2008, 11:14 AM   #10 (permalink)
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Sorry it took so long to respond but I thought I sent a reply 2 days ago I must not have hit the send button....I looked and it did not have a MAP sensor. But has about a mile of vacuum Lines under the hood
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