keeping power up
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Junior User
Joined: Sep 2003
Posts: 66
Likes: 0
keeping power up
I have an 81 f150 with a carburated 300 I-6. The problem I am having is that the power it has varies from day to day. On some days I think it may very well have a 460 under the hood, while on other days it has about as much power as a toaster. Is there any way to get the power to go up and stay up consistantly?
More Turbo
Joined: Mar 2002
Posts: 508
Likes: 2
From: Easthampton, Ma.
Sorry, I couldn't resist!
It sounds as though something it holding back the distributor vacuum or mechanical advance intermittantly.
Pull the dist. cap off, grasp the rotor and try to turn it. It should turn about 20 degrees and you should feel spring tension while doing this. ( this is the mechanical )
Remove the hose from the vacuum diaphragm, connect another hose to it and suck on it. You should observe movement inside the distributor. (vacuum advance)
Check all the vacuum hoses for cracks and proper fitment.
Check to make sure they are correctly plumbed.
Check coil and cap for carbon arcing.
Check the integrity of all plug wires.
Check the air filter, warm air door operation and hose.
Does it need a tune-up?
Check timing
Let us know what you find!
Good luck!
It sounds as though something it holding back the distributor vacuum or mechanical advance intermittantly.
Pull the dist. cap off, grasp the rotor and try to turn it. It should turn about 20 degrees and you should feel spring tension while doing this. ( this is the mechanical )
Remove the hose from the vacuum diaphragm, connect another hose to it and suck on it. You should observe movement inside the distributor. (vacuum advance)
Check all the vacuum hoses for cracks and proper fitment.
Check to make sure they are correctly plumbed.
Check coil and cap for carbon arcing.
Check the integrity of all plug wires.
Check the air filter, warm air door operation and hose.
Does it need a tune-up?
Check timing
Let us know what you find!
Good luck!
Senior User
Joined: Jul 2003
Posts: 223
Likes: 0
From: toronto
i got a 300 in my truck an it did the same to. iv changed all the gaskets an vac lines an it made a difference to how it runs .but now iv also put on the 2 bbl carb an delco alt an a gm hei igition an its woke up even more an so have my gas milage
