Vacuum hoses not connected on my '84 S-10?

Question

I have an '84 S-10 that hasnt been running right. I took it to a mechanic and after a couple days, they said the carberetor needs to be replaced. I asked the guy over the phone if he had checked the vacuum hoses/lines (there were quite a few hoses not connected under the hood). He said they checked them but it was not the problem. Before I took my truck to the mechanic, I gave it a tune-up: plugs, wired, cap, rotor, and fuel system cleaner. My question is, what will happen if my truck is still being run without vacuum hoses being connected even with a new carberutor? Thanks.

Also, I took it to the mechanic because the truck wanted to shut off when I hit the gas.

Answer 1

Just go buy a Chilton's manual or something similar and look at the vacuum hose routing diagram in the book. As long as it's the same type of carburator that came on your truck when it was new you shouldn't have any problems at all figuring out where all the vacuum hoses go to. An yes by the way if the vacuum is not routed properly your truck will run and idle poorly. Some vacuum ports that stick out on your carburator aren't used just plug them off. Hope this helped you out.

Answer 2

You can try carburettor cleaner to clean it out. I once had a car that would hesitate every time I gave it gas, I sprayed the stuff down the car as it was running and all the black crap came out the tail pipe, hesitation gone. I recommend this before a re-build carb, cheap to do and easy but do an oil change after this as oil can get thinned out with it.

Answer 3

If the emmissions control equipment is still there, they need to be hooked up. It will run rough, particularly at idle with open vacuum lines. (Unless you cap the carb ports.)

If you still have good compression, and the timing chain/belt is within spec, you should be able to tune that puppy.

Answer 4

The power brake booster connects to the back on top of the intake manifold, trans modulator on the passenger side of the carb, vacuum advance on the carb to a slow vacuum line, the kind that creates more vacuum as you rev the engine, I forget the real name of the vacuum line.....

Answer 5

how can someone diagnos a bad carb when u have so many vacumm hoses off????? i know there are many vac hoses on a s/10...have ur engine compression tested, if it test ok. its still worth fixin. but u should always try to have them vac hoses connected thatll also help some with fuel eccon.

Answer 6

23 years. Time for a new crate engine.