I didn't realize that it was missing the smog pump and others at first either all I knew was I had lines disconnected everywhere. At this point I'm thinking to leave it alone because it would take some $$ to put it back to factory. I only drive 10 blocks back and fourth once a day and it's running enough for that right now. If I could figure out why the choke pull off has no vac it would be a lot easier to start. The other end of that vac line is hooked to the fitting at the bottom of the carb like it should but there's no vac from that fitting. Could that be a bad gasket on the bottom of the carb. It's not six months old and I checked the mounting bolts are tight. I'm thinking about hooking that line to an open port on the vac tree. Is that a bad idea?

 

Some ports lower on the carb only gets vac when you give it throttle so check that port for vac with a little throttle.


If you cant find another port on the carb that has vac when at idle then I don't see why you could not use a port on the vac tree.


BTW if that port you have the pull off hooked to only gets vac when you give it throttle and you have a dist with vac advance you can hook that port to the dist.
If the dist does not have vac advance plug the port on the carb.
Dave ----

 

Thanks Dave I really appreciate that I would never have thought about hooking that too the dist. I'm not sure if the dist has a port but I will sure check.

 

Do you know where that port would be on the dist? it is just a factory dist

 

 

That distributor has no vacuum advance. Advance is computer controlled.

 

There is your problem right there in the picture. TFI ignition.

 

So I need this one on eBay?

 

Yep, that would work. It has all the goodies in it to advance the timing as the rpm increases, and also vary the timing with engine load with the vacuum advance connection.

I seem to remember your electronic carb does not have a ported vacuum port like you need for the dist. But you could do it in stages, new dist with electronic carb, and then change the carb out later. That would be a large improvement over what you have now.

 

Whisler & Franklin are right advance is controlled by computer so if that port on the carb has vac above idle just plug the port.


But do find a port on carb or vac tree that has vac all the time to hook the choke pull off to.
Dave ----

 

I believe I do have a vac port on the carb but unsure and it's dark. I have learned a lot tonight or so I think I have and will know more tomorrow. What kind of carb would I need to eventually get as Dave mentioned above?

I have another completely unrelated quick question. Does anyone know of some kind of guide to greasing my beast? It's 4x4 and I'm pretty handy just inexperienced and I know what a grease fitting looks like but I really would hate to miss one because we all know that will cause me a lot of problems I don't really need right now!!!

 

For a carb it would need to be pre-computer days carb.
I don't remember what motor you have but would think 81 or older for the size motor you have.
Dave ----


edit: some people hook the dist. vac advance to full manifold vac. and if you Google it you will come up with all kinds of reasons why & why not to.

 

Just get a early 80's carb for a 300 that didn't have a computer.

You can tell how much stuff has been replaced on the front suspension by how many grease fittings you find. Replacement balljoints and steering joints have grease fittings, the factory ones did not.

You may find some on the u-joints if they have been replaced. But sometimes they are hard to get to and grease.

 

Sounds like a good plan thank you so much I have a little more faith now as I knew the motor sounded good(with a miss) and has good power but just needed a little help. I like the idea of getting rid of the computer stuff as much as possible but I also didn't want to completely trash this thing because it's got plenty of life left it seems.

 

CONCLUSION- I was NOT getting vacuum to the choke pull off and had a hidden vacuum leak that I found this morning!!!!!!

First on the choke pull off it makes a world of difference if it actually works lol. I was not getting vacuum from the port it was hooked to.(not sure why) so I hooked a vacuum line from the vacuum tree under the carb for a constant vacuum.(very important) now on my truck a lot of emissions have been removed by the previous owner such as the smog pump. Well I never thought to check those plug caps for leaks. Of course the one had a good size hole. I just used that port for my choke pull off. Problem solved!!!!! The port that was used on the carb is now plugged but even when speeding up the motor didn't have vacuum. So for now I will run it like it is.

Guess what when I went to start the motor I barely touch the key in start position and my beast jumped to life!!!! I'm very happy this morning and love my truck!!!

I did ALOT of research through all this and have found some ideas I'm interested in like replacing the tfi distributor with a good hei distributor and getting a new intake manifold for a 2 or maybe even a 4 barrel carb and completely removing the ECM all together as it's about halfway there already and I will have a real nice and wire jumbo free mud truck. I am however a stock kind of guy and I think my soulution to that is adding a whole new truck probably just a 2wd with a lot less rust and that has not been ran through a high school students shotty mechanics! Thank you to everyone that has helped me here you all are truly amazing!!!!!