I decided, to see if i could get the cruise control to work , i found a broken wire on the speed sensor which on my truck is where speedo cable fits into the transmission , i had to refit the servo which had been out for quite a while , i also found two plugs exactly the same ! but there is only one long enough to reach the servo , I fitted a new throttle cable , and clipped the servo cable in . On the first test run it worked ok, but it didn't work all the time ? I had asked some questions on ford truck forums , and asked Gary a couple as well , so i removed the servo to check the condition of what ever was inside it . ,This my version of how it works
![]() well that's what i gather from looking at all the internals . Hope this helps someone , I made a Vacuum canister( Maybe i should have used a dog food can) ! to help the system have more volume, it has a non-return valve ,also i had weak accel and i tried lifting my brake pedal while setting the accel and truck pulled good to set speed , my dump valve was bleeding vacuum , so with torch in hand , turned it about 2 turns toward the pedal i think the nylon tip gets worn and not sure how it seats but if it was rubber, it could be hard , also I think that when you turn cruise off on the pad, it takes longer to bleed the vacuum down and the dump valve is more of a noticeable off. white arrow to servo , yellow arrow from engine ,supply vacuum , Cheers ![]() ![]()
1986 F150 Lariat Supercab 302 efi , soon to have a 385 ci w , forged crank,king bearings , crower billet rods, Auto tech forged pistons world products Snr heads , Comp retro fit 35-421-8 HR, steel roller lifters , Milodon single idle gear drive , Mallory dual sync dissy ,Motec ECU , Profesional products intake , 75 mm TB , 40lb EV1 , Doug thorly Tri-y long tubes , Block 1974 with 1990 serpentine front drive and new Motorcraft A/C pump , will put 3G alternator on it , ford racing diff cover and have a new track-loc , to fit . I have converted it to a 5 speed Tremec TR4250 as the AOD died .
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Administrator
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Good job, Vaughn! Thanks for the write-up. It will surely help someone at some point who is struggling getting one of these things going. Who know, it may be me!
Is the yellow arrow pointing to your vacuum canister? That's pretty! But it looks like it is mounted on the rare aux battery mount. Is that what it is?
Gary, AKA "Gary fellow": Profile
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
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That’s great!
Dane
1986 F250HD SC XLT Lariat 4x4 460 C6-Sold 1992 Bronco XLT 4x4 351W E4OD 1998 GMC Sierra SLE K1500 350 4L60E Arizona |
In reply to this post by Gary Lewis
Hi , Gary, didn't come out too bad , quite pleased and it works, the yellow arrow is the hose coming from my motor to the new canister , i used an old brake booster check valve , I dont know about the battery mounting tray ,there was sort of a flat spot, with three holes.............????? , so to find out about my truck , what do i look up, door code , vin , i have the usa plate, cheers
1986 F150 Lariat Supercab 302 efi , soon to have a 385 ci w , forged crank,king bearings , crower billet rods, Auto tech forged pistons world products Snr heads , Comp retro fit 35-421-8 HR, steel roller lifters , Milodon single idle gear drive , Mallory dual sync dissy ,Motec ECU , Profesional products intake , 75 mm TB , 40lb EV1 , Doug thorly Tri-y long tubes , Block 1974 with 1990 serpentine front drive and new Motorcraft A/C pump , will put 3G alternator on it , ford racing diff cover and have a new track-loc , to fit . I have converted it to a 5 speed Tremec TR4250 as the AOD died .
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Also my truck is an 86, but i put the late model air box and washer/ coolant container, because the air box wouldn't fit over the cobra rocker covers , which were required as it has got comp cams steel rockers on 7/16 screw in studs, I didn't like the hot air box anyway , I always keep all my parts. Cheers
1986 F150 Lariat Supercab 302 efi , soon to have a 385 ci w , forged crank,king bearings , crower billet rods, Auto tech forged pistons world products Snr heads , Comp retro fit 35-421-8 HR, steel roller lifters , Milodon single idle gear drive , Mallory dual sync dissy ,Motec ECU , Profesional products intake , 75 mm TB , 40lb EV1 , Doug thorly Tri-y long tubes , Block 1974 with 1990 serpentine front drive and new Motorcraft A/C pump , will put 3G alternator on it , ford racing diff cover and have a new track-loc , to fit . I have converted it to a 5 speed Tremec TR4250 as the AOD died .
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