why doesnt my truck run right?
#16
03-27-2012, 12:37 PM
ok, i just read that whole article and it was very helpful, now i have one question, vacuum advance is supposed to use manifold vacuum? i did a lot of asking around and not once did someone say manifold vacuum, i was under the impression vacuum advance was for when you want to accel fast and the centrifical advance wasnt enough. so either was a vacuum advance wasnt my problem because i experience this issue at Close to WOT or WOT, anything below half throttle is fine
#17
03-27-2012, 12:49 PM
ok, i just read that whole article and it was very helpful, now i have one question, vacuum advance is supposed to use manifold vacuum? i did a lot of asking around and not once did someone say manifold vacuum, i was under the impression vacuum advance was for when you want to accel fast and the centrifical advance wasnt enough. so either was a vacuum advance wasnt my problem because i experience this issue at Close to WOT or WOT, anything below half throttle is fine
#18
03-28-2012, 07:28 AM
From article:
If this is true why would it be potted vacuum instead of manifold? Doesn't potted increase as you open throttle? Manifold is what it sounds like it would be describing
Vacuum Advance: Most Ford distributors include a vacuum advance mechanism. This consists of a diaphragm vacuum canister, an arm from the canister to the breaker plate, and a hose connected to an engine vacuum source. The purpose of this mechanism is to provide spark advance when the engine is not spinning fast enough to create the centrifugal advance talked about earlier. In other words this is an engine-load dependent advance. This would be a typical situation when climbing a steep hill, or driving at low rpms, light throttle, conditions. In these conditions there is high engine vacuum, so the vacuum signal applied to the diaphragm in the canister, via the hose, will cause a 'pull' effect on the arm, which moves the breaker plate and results in a timing advance. During full throttle conditions there is very little engine vacuum, and thus the vacuum advance does not contribute to total advance.
#19
03-28-2012, 07:49 AM
#20
03-28-2012, 07:56 AM
#21
03-28-2012, 08:02 AM
factory, and sorry potted was auto correct on my phone, but this article basically just explains how youll get better fuel economy with it hooked up to manifold, and since hiigh rpm is all centrifical anyways what good would ported advance be? i know this isnt my problem anymore but now i just want answers lol
#22
03-28-2012, 08:08 AM
#23
03-28-2012, 08:21 AM
ok does your dist have any way to advance the timing? ie mechanical advance?
oldstyle is right but all else aside if your dist cant advance the timing then your engine isn't going to want to run as it should. The problem could very well NOT be your advance but as of right now thats the only thing that we know for sure. I would recommend hooking it back up the right way and go from there.
Ya know just kind of run through the list of demons and knock them off one by one. Just trying to clear the air.
oldstyle is right but all else aside if your dist cant advance the timing then your engine isn't going to want to run as it should. The problem could very well NOT be your advance but as of right now thats the only thing that we know for sure. I would recommend hooking it back up the right way and go from there.
Ya know just kind of run through the list of demons and knock them off one by one. Just trying to clear the air.
#24
03-28-2012, 08:51 AM
#25
03-28-2012, 09:13 AM
#26
03-28-2012, 09:19 AM
#27
03-28-2012, 09:37 AM
#28
03-28-2012, 11:04 AM
#29
03-28-2012, 09:47 PM
#30
03-29-2012, 06:39 AM