83 F-150 Variable venturi set-up
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83 F-150 Variable venturi set-up
I have a 83 F-150 that had a variable venturi carb. The carb has been replaced with a Holley 2300. All of the electrical connections have been pulled to the side and tied off.
The truck runs, but just OK, not with any power and it wants to die when put into drive/reverse.
Do I need to change the distributor also?
What else should I do to complete the conversion from the Variable Venturi carb?
Z.
The truck runs, but just OK, not with any power and it wants to die when put into drive/reverse.
Do I need to change the distributor also?
What else should I do to complete the conversion from the Variable Venturi carb?
Z.
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From: Munroe falls, Ohio
you basically want to convert to a duraspark 2 ignition system and get rid of the computer you have now.
to go from a tfi/eec4 ignition system to a duraspark 2 system, heres what you need.
*ds2 dizzy for your engine, either junkyard or parts store.
*wire harness between dizzy and module, junkyard or make your own by buying the two connectors.
*blue grommet ds2 ignition module, parts store or junkyard.
*regular / non emissions carb.
*ds2 coil and resistor wire.
now you can remove the entire wire harness near the gas pedal and the computer inside the cab. disconnect and remove all sensors and vacuum hoses. install new vacuum hoses to any equipment you have left.
to go from a tfi/eec4 ignition system to a duraspark 2 system, heres what you need.
*ds2 dizzy for your engine, either junkyard or parts store.
*wire harness between dizzy and module, junkyard or make your own by buying the two connectors.
*blue grommet ds2 ignition module, parts store or junkyard.
*regular / non emissions carb.
*ds2 coil and resistor wire.
now you can remove the entire wire harness near the gas pedal and the computer inside the cab. disconnect and remove all sensors and vacuum hoses. install new vacuum hoses to any equipment you have left.
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From: Munroe falls, Ohio
you remove your original dizzy, the TFI ignition system has 6 wires going to a module on the dizzy, and replace it with a duraspark 2 dizzy(has a vacuum advance canister on it).
you also need the (4 wire) wire harness that goes from the dizzy to the drivers fender area.
pic of dizzy:
http://www.partsamerica.com/ProductD...pe=218&ptset=A
you also need the (4 wire) wire harness that goes from the dizzy to the drivers fender area.
pic of dizzy:
http://www.partsamerica.com/ProductD...pe=218&ptset=A
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[QUOTE=84-250]you remove your original dizzy, the TFI ignition system has 6 wires going to a module on the dizzy, and replace it with a duraspark 2 dizzy(has a vacuum advance canister on it).
you also need the (4 wire) wire harness that goes from the dizzy to the drivers fender area.
pic of dizzy:
http://www.partsamerica.com/ProductDetail.aspx?mfrcode=A1C&mfrpartnumber=30289 5&parttype=218&ptset=A[/QUOTE]
Your link just puts me at the home page of advanced autoparts.
When you say "remove the orriginal Dizzy" what does that include?
Distributor?
Control module?
Coil?
.
you also need the (4 wire) wire harness that goes from the dizzy to the drivers fender area.
pic of dizzy:
http://www.partsamerica.com/ProductDetail.aspx?mfrcode=A1C&mfrpartnumber=30289 5&parttype=218&ptset=A[/QUOTE]
Your link just puts me at the home page of advanced autoparts.
When you say "remove the orriginal Dizzy" what does that include?
Distributor?
Control module?
Coil?
.
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From: Munroe falls, Ohio
sorry about the link, go to the partsamerica homepage, and type "302831" in the search bar. i didnt know what engine you had so i picked a 302, but the general look is the same just get the right dizzy for your engine.
-you want to take the TFI dizzy out, remove the EEC computer under the dash near the gas pedal and remove the entire wire harness.
-to install:install ds2 dizzy(timed right), screw down ds2 module on drivers fender or so, install wire harness between module and dizzy, apply key switched power to module red wire and your done.
-optional:apply power to white wire of module only when key is in start position to aid in easier starting.
-you want to take the TFI dizzy out, remove the EEC computer under the dash near the gas pedal and remove the entire wire harness.
-to install:install ds2 dizzy(timed right), screw down ds2 module on drivers fender or so, install wire harness between module and dizzy, apply key switched power to module red wire and your done.
-optional:apply power to white wire of module only when key is in start position to aid in easier starting.
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Thanks guys, it's all starting to make sense now.
I have the 351 in this truck so the "Dizzy" you found for me won't fit. but I'm sure I can find the correct one.
I'm still a little fuzzy on the module under the dash. You sat to remove it but then I just replace it with a different one mounted under the hood? I suppose that is where the wiring harness from a donor truck will come in to patch from the connectos of the old module to the new one under the hood.
Sorry about alll the questions any fords I've had before were older then 1975 models.
.
I have the 351 in this truck so the "Dizzy" you found for me won't fit. but I'm sure I can find the correct one.
I'm still a little fuzzy on the module under the dash. You sat to remove it but then I just replace it with a different one mounted under the hood? I suppose that is where the wiring harness from a donor truck will come in to patch from the connectos of the old module to the new one under the hood.
Sorry about alll the questions any fords I've had before were older then 1975 models.
.
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From: Munroe falls, Ohio
-the computer under the dash is for the TFI/EEC4 ignition system, it controls the ignition timing, emissions, carb mixture, once you remove anyone of its inputs(tps,map,etc) the whole system is worthless, so when you replace it with the DS2 system you rip it out, unless you like all the extra junk laying around.
-you have to get a distributor from a 351w only, your correct distributor is "302895" on the partsamerica website
-the module you need is "EL107"
-the harness goes from the new distributor to the new module on the fender and has nothing to do with the old computer/ignition system. ive never seen a new harness that you can buy, just ones from a junkyard.
-you have to get a distributor from a 351w only, your correct distributor is "302895" on the partsamerica website
-the module you need is "EL107"
-the harness goes from the new distributor to the new module on the fender and has nothing to do with the old computer/ignition system. ive never seen a new harness that you can buy, just ones from a junkyard.
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From: Asheville, NC
The original distributor on a 351W Duraspark III system has NO operating parts other than the rotor inside the distributor housing. The computer for this system is mounted under the seat on my F-150. Look and see. The TFI has a small rectangular box installed on the lower side of the distributor with a rectangular connector hooked to it.
I found that my 351W has NO TIMING MARKS, as it was designed with the electronic pick-up. Before I replaced the old system, I marked the damper with a sort-of timing mark just to see what the timing was doing. The old computer would vary the timing by about an inch on either side of my mark at idle, and the engine speed would vary too. That has stopped with the Duraspark II.
I found that my 351W has NO TIMING MARKS, as it was designed with the electronic pick-up. Before I replaced the old system, I marked the damper with a sort-of timing mark just to see what the timing was doing. The old computer would vary the timing by about an inch on either side of my mark at idle, and the engine speed would vary too. That has stopped with the Duraspark II.
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Some great information here, Thanks.
I ordered a new distributor and control module based on your info. The price for the new components is cheap enough to keep me from going to a junkyard and rummaging around.
I haven't decided on what to do about the wire harness yet, but I will look at maybe using the original wires and relocate them to fit the new set-up.
I think one of the links showed how to do the change over.
.
I ordered a new distributor and control module based on your info. The price for the new components is cheap enough to keep me from going to a junkyard and rummaging around.
I haven't decided on what to do about the wire harness yet, but I will look at maybe using the original wires and relocate them to fit the new set-up.
I think one of the links showed how to do the change over.
.
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my 83' F250 had the ECM under the seat, instead of under the dash... I did the conversion to the 75 ignition set up... I swapped out my VV, and manifold for an Edelbrock 1406, a new manifold, new distributor... you'll need an early model ignition box, as well as an early wiring harness for the plugins not included in your harness...
there is an article onsite that will walk you through the conversion...
there is an article onsite that will walk you through the conversion...
