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Okay if you guys have been reading my other posts Im still working on the same problem, and I really need some input.
1969 429 thunderjet in 79
Carb is good, was rebuilt with bigger jets since the problem started, also tried a different carb. Changed the coil, changed the ignition box, has new plugs and rotor and cap, changed the fuel filter, I am going to remove the carb spacer tomorrow.
Now the problem
It used to just studder slightly at half throttle when on the road , then it got a little worse, and now the engine completely dies when at half throttle and studders a little before and a little after. if I let off the throttle a little the engine fires right back up and runs smooth and the same when I floor it.
Can't get it to do it when sitting in neutral or park. Or when the engine is cold.
HELP!!! This is my daily driver and Im really close to doing lord knows what to that thing
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69 429 thunderjet Dies mid throttle
#1
- Bronco Pimp
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- Group: Members
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- Gender:Male
- Location:Canadian Boonies
Posted 18 June 2009 - 06:00 PM
If I had money I would buy an escalade lift it and beat it to death in mud holes and rock crawls. then show it off to the looser city kids who get them from their parents
81 Bronco 300 4spd, 4" skyjacker coils in front, 3" add a leaf by trailmaster in rear, and 2" blocks. 33x12.5x15, Sold my baby.
81 F150 swapped 390 with broken frame, scrapped the truck but kept the motor then sold it later for $500
88 GMC 3500 flatbed dually, 350 swap, scrapped the truck but kept the motor, now in 88 Camero Drag car
95 GMC 2500 ext cab, seized 6.5 with blown tranny and transfercase, sold for $500 with a mint body.
89 F-150 302 efi 4x4 Shortbox restored (mostly)
79 Ford Thunderbird 429 swap summer/ drag car. rebuilt motor and trans, Haven't lost yet.
69 Mustang 302 4 spd original numbers matching, red/black.
81 Bronco 300 4spd, 4" skyjacker coils in front, 3" add a leaf by trailmaster in rear, and 2" blocks. 33x12.5x15, Sold my baby.
81 F150 swapped 390 with broken frame, scrapped the truck but kept the motor then sold it later for $500
88 GMC 3500 flatbed dually, 350 swap, scrapped the truck but kept the motor, now in 88 Camero Drag car
95 GMC 2500 ext cab, seized 6.5 with blown tranny and transfercase, sold for $500 with a mint body.
89 F-150 302 efi 4x4 Shortbox restored (mostly)
79 Ford Thunderbird 429 swap summer/ drag car. rebuilt motor and trans, Haven't lost yet.
69 Mustang 302 4 spd original numbers matching, red/black.
MultiQuote
#3
- Supreme Commander
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- Interests:Ford there is nothing else =)
Posted 30 June 2009 - 10:18 AM
I know what it is its broken and you should sell it to me 
Seriously check your distributor the duraspark units have a mechanical advance under the base plate under the rotor . Usually what happens is the plastic bushings in the weights will deteriorate and the timing gets really wierd at this point that could be your problem do you have another one to try ? One from a 351M / 351C / 400 / 429 / 460 will work .
Seriously check your distributor the duraspark units have a mechanical advance under the base plate under the rotor . Usually what happens is the plastic bushings in the weights will deteriorate and the timing gets really wierd at this point that could be your problem do you have another one to try ? One from a 351M / 351C / 400 / 429 / 460 will work .
#4
- Bronco Pimp
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- Gender:Male
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Posted 12 July 2009 - 06:52 AM
yeah I got a 351 sitting on the shop that has the same distributor. I sent it to my uncles shop but i'll see how far he's gotten, and I'll toss in the tidbit of information
thanks for the help
thanks for the help
If I had money I would buy an escalade lift it and beat it to death in mud holes and rock crawls. then show it off to the looser city kids who get them from their parents
81 Bronco 300 4spd, 4" skyjacker coils in front, 3" add a leaf by trailmaster in rear, and 2" blocks. 33x12.5x15, Sold my baby.
81 F150 swapped 390 with broken frame, scrapped the truck but kept the motor then sold it later for $500
88 GMC 3500 flatbed dually, 350 swap, scrapped the truck but kept the motor, now in 88 Camero Drag car
95 GMC 2500 ext cab, seized 6.5 with blown tranny and transfercase, sold for $500 with a mint body.
89 F-150 302 efi 4x4 Shortbox restored (mostly)
79 Ford Thunderbird 429 swap summer/ drag car. rebuilt motor and trans, Haven't lost yet.
69 Mustang 302 4 spd original numbers matching, red/black.
81 Bronco 300 4spd, 4" skyjacker coils in front, 3" add a leaf by trailmaster in rear, and 2" blocks. 33x12.5x15, Sold my baby.
81 F150 swapped 390 with broken frame, scrapped the truck but kept the motor then sold it later for $500
88 GMC 3500 flatbed dually, 350 swap, scrapped the truck but kept the motor, now in 88 Camero Drag car
95 GMC 2500 ext cab, seized 6.5 with blown tranny and transfercase, sold for $500 with a mint body.
89 F-150 302 efi 4x4 Shortbox restored (mostly)
79 Ford Thunderbird 429 swap summer/ drag car. rebuilt motor and trans, Haven't lost yet.
69 Mustang 302 4 spd original numbers matching, red/black.
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