Cracked vacuum line
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Davemc1963
93 Ty Owner
Re: Cracked vacuum line
Any vacuum leak will result in a bad running truck, depending on how big and where it is, as the air is bypassing the TB, so depending on what vacuum you are pulling at the time, the amount of air being drawn in will play havoc with the fueling, as the O2 sensor will constantly be trying to correct fueling for the air being drawn in.
If your Ty is plumbed as per original, the front vacuum line in the picture feeds the HVAC, EGR, Cruise Control and Vacuum reservoir / tank(ball) and has a couple of NRV's.
You could temporarily cap it and loose the above, to see if it runs better (short term!) but would eventually throw an egr fault code.
If it was the rear one at the back of the plenum, that would be more of a worry, as it feeds the FPR and MAP sensor.
However, if all your vac hoses are original, change them out NOW. Particularly the ones connected to the turbo / Boost solenoid.
There should be a vacuum hose diagram on a sticker under the hood. If its missing, there have been plenty of pics posted on here in the past if you do a search.
Most people just use silicone hoses, which are readily available.
Any vacuum leak will result in a bad running truck, depending on how big and where it is, as the air is bypassing the TB, so depending on what vacuum you are pulling at the time, the amount of air being drawn in will play havoc with the fueling, as the O2 sensor will constantly be trying to correct fueling for the air being drawn in.
If your Ty is plumbed as per original, the front vacuum line in the picture feeds the HVAC, EGR, Cruise Control and Vacuum reservoir / tank(ball) and has a couple of NRV's.
You could temporarily cap it and loose the above, to see if it runs better (short term!) but would eventually throw an egr fault code.
If it was the rear one at the back of the plenum, that would be more of a worry, as it feeds the FPR and MAP sensor.
However, if all your vac hoses are original, change them out NOW. Particularly the ones connected to the turbo / Boost solenoid.
There should be a vacuum hose diagram on a sticker under the hood. If its missing, there have been plenty of pics posted on here in the past if you do a search.
Most people just use silicone hoses, which are readily available.
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