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I just did the weber swap and now it backfires when i accelerate, would the cause be over fueling or something else? in continueusly blows a couple of my vaccum caps off.
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Owner of a 1989 Maroon Ford Festiva lx 5 speed. -
(caution: I don't do carb festivas)
How's the idle? If it idles rough and is backfiring through the carb, check your firing order.~Nate
the keeper of a wonderful lil car, Skeeter.
Current cars:
91L "Skeeter" 170k, Aspire brakes, G15, BP, Advancedynamics coil overs, etc. My first love.
1990 Kawasaki Ninja 250 - my gas saver, 60+mpg - 40k
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I finally got it to idle OK but as soon as i blip the throttle then it back fires.Owner of a 1989 Maroon Ford Festiva lx 5 speed.Comment
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Which Jet kit do i order the jet kit for the 32/36 Dgev has 145 main as the smallest?Owner of a 1989 Maroon Ford Festiva lx 5 speed.Comment
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With the engine shut off, hold the choke open, look down the throat of the carb and move the linkage from closed to wide open. You should see a solid stream of gas squirt into the throat of the carb each time you turn the linkage. If you don't see any gas, your accelerator pump may be bad or your float level extremely low. If you see gas, check for vacuum leaks on your intake, either an uncapped connection or a leaking flange connection.You gonna race that thing?
http://www.sdfcomputers.com/Festivaracing.htmComment
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It has a solid stream of fuel I am thinking that i have to big of jets so what all jets do i need to replace.Owner of a 1989 Maroon Ford Festiva lx 5 speed.Comment
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I kinda told you a few times that you would need smaller jets...that kit was for a 2.0+ liter engine91GL BP/F3A with boost
13.79 @ 100, 2.2 60' on 8 psi and 155R12'sComment
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Check your timing and make sure it is right.
Improper size jets should not cause a backfire. When I first got my weber, it had huge jets in it .... it still ran. It ran rich and bogged some, but ran pretty well for how big the jets were.
And as mentioned, check for vacuum leaks, as they will cause it to misfire.
DO NOT use vacuum caps. They will rot and crack and cause issues within 6 mos. Use vacuum line and connect one vac port to the next one with the line, effectively making a "cap".Dan
Red 1988 Festiva L - CUJO
Black 1992 Festiva GL Sport - BLACK MAGIC
I'm just...a little slow... sometimes:withstupid:
R.I.P.
Blue 1972 Chevelle SS-468 C.I.D. B'nM TH400-4:56 posi-Black racing stripes-Black vinyl top-Black int.
Black on black 1976 Camaro LT-350 4 bolt main .060 over
Silver 1988 Festiva L
My Music!
http://www.reverbnation.com/main/sea...t_songs/266647Comment
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Which jets do i need to replace?Owner of a 1989 Maroon Ford Festiva lx 5 speed.Comment
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both the main and secondary (both found in the bottom of the bowl)Trees aren't kind to me...
currently: 2 88Ls (Scrappy and Jersey), 88LX, 90L(Pepe), 91L, 91GL (Skippy) 93 GL Sport (the Mighty Favakk), 94 (Bruce) & 95 Aspire SEs, 97 Aspire (The Joker),
94 Justy 4WD, 87 Fiero GT, plus 2 parts cars. That's my fleet.
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Should I start with 100's or what?Owner of a 1989 Maroon Ford Festiva lx 5 speed.Comment
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Backfire = timing is off
If you have a backfire condition, jets will not fix it
As for the jets, start with .125Last edited by drddan; 05-10-2014, 09:07 AM.Dan
Red 1988 Festiva L - CUJO
Black 1992 Festiva GL Sport - BLACK MAGIC
I'm just...a little slow... sometimes:withstupid:
R.I.P.
Blue 1972 Chevelle SS-468 C.I.D. B'nM TH400-4:56 posi-Black racing stripes-Black vinyl top-Black int.
Black on black 1976 Camaro LT-350 4 bolt main .060 over
Silver 1988 Festiva L
My Music!
http://www.reverbnation.com/main/sea...t_songs/266647Comment
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The timing is on and no vacuum leaks, it is still backfiring and i put smaller jets in any ideas?Owner of a 1989 Maroon Ford Festiva lx 5 speed.Comment
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Bad compression?
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What would cause that?Owner of a 1989 Maroon Ford Festiva lx 5 speed.Comment
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