92 240 Idle problem
#2
Pop off your air intake hose. Get a can of spray "carb/choke" or "air intake" cleaner PREFERABLY with a straw. Bend the straw in such a way that you can spray into the throttle body with the can upright so you get as much of the fluid out of the can as possible (to conserve if you want to use it later). Put a rag under the throttle body to catch the runoff. Manually open the throttle valve and start spraying making sure you get all around the tb. Then wipe out the tb/valve with a CLEAN rag. You can also spray into the tb while the car is running and work the valve to keep it going, but don’t be afraid of a little smoke!
#3
I would pop the whole thing off if you have an extra gasket around to put it back on. My mechanic told me to do this because you can damage the master cylinder just cleaning it when it is attached. I think it would be a little more easy, plus you can do a more thorough job. Or buy a new one. What kind of idle problems are you having?
#4
How can you damage the master cylinder? Is it likely that you'll even get any solvent in the booster vacuum line? No. Will it hurt anything if you do? No. It is pulling a VACUUM from the intake to the brake booster, there is no way of getting solvent to flow from the tb, up through the intake, up again through the booster vacuum line, and then break through the metal and seals of the booster, and the plastic/seals of the master cylinder. Impossible. Plus as soon as you as you start the engine it pulls vacuum on the booster, which would draw out any residual solvent that, highly unlikely, made it up the vacuum line. I've done 1000's of cars just like I described with no ill effects, andd especially no damage to brake components of any kind.
#5
#6
#7
It's not wrong, I just think it's easier to do without removing it. It's more thorough to remove it and clean it, though. I just had my intake manifold off to replace the gasket and sprayed the cleaner up through the intake ports and let it soak in the TB while it was aside, then opened the valve to let the junk run out.
#8
No apologies needed. These cars are cost prohibitive for most folks to have all the work done professionally. One of the main reasons they sell so cheaply is the current owner lacks the skill, ability, tools or desire to do the work themselves. With a minimum of tools and armed w/ a Chiltons/Haynes/Volvo Greenbook...anything is possible!
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