What's the best way to search for a vacuum leak?
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eternalsoil
Junior Member
Are these the same codes that come up when you just need a new gas cap?
Sent from my SM-N920T using Tapatalk
Sent from my SM-N920T using Tapatalk
Yeah, they are 02 codes that I've been dealing with for over 4 years....I changed a couple of the sensors that were required...I had a thread I've got to look up to see exactly which ones I changed for reference which didn't even fix codes then. Spent $200 bucks on sensors for nada!! But the guy at Autozone said it could stem from the p0171 code as a vacuum leak which could throw off the sensors to begin with. Now yes, he's an Autozone guy but it sounded something to look into as nothing else worked. I'm going to bust my flashlight out now and search all hoses for cracks and loose fittings. I also got a new cap 6 months ago which did nothing. More money thrown away. Ugh!! Thanks guys
blackoutt
New member
Visual inspection may work or hopefully someone will chime in with common leak points on this engine.
Smoke a cigar or vape (if you have any dooshy friends) by the engine and see where the smoke gets sucked in. Difficult with the fan blowing though.
Could also cap off the crank case breather, use a 3.5" silicone coupler and clamp a PVC cap with quick disconnect air fitting into in the end, then with a regulator slowly build some pressure in the intake manifold/vac lines, 5psi should work fine. You may hear oil bubbling/air getting past your rings and venting out the dipstick tube, hold your oil fill cap down tight. Then search for the hiss and feel the breeze, this is actually a cheap DIY boost leak test for turbo cars but suppose it could work in this case?
Smoke a cigar or vape (if you have any dooshy friends) by the engine and see where the smoke gets sucked in. Difficult with the fan blowing though.
Could also cap off the crank case breather, use a 3.5" silicone coupler and clamp a PVC cap with quick disconnect air fitting into in the end, then with a regulator slowly build some pressure in the intake manifold/vac lines, 5psi should work fine. You may hear oil bubbling/air getting past your rings and venting out the dipstick tube, hold your oil fill cap down tight. Then search for the hiss and feel the breeze, this is actually a cheap DIY boost leak test for turbo cars but suppose it could work in this case?
And I cleaned my MAF sensor about 5 months ago when I intalled the sensors...It was totally clean but I sprayed it down anyway. Yes I used MAF cleaning stuff. Thanks again for your help. Ill try that one after inspection later...And I smoke a vape...confiscated it from my 17yr old to quit smoking. So I'm a dooshy? Its Bow season this weekend and I no longer smell like an ashtray.....I feel hurt that I'm in the dooshy category now. :shrug:
Freyer
New member
If you do it to quit smoking great. If you do it to look cool...douchey. :biggrin2:
I did it to quit since I would never even go into one of those shops to begin with. But it has worked great for 2 months even though my wife hates it. Ok, I feel better now....
And....back to hose checking. I'll spray it later tonight when the engine cools down, with my luck it will burst into flames...
Another way I have used to find vacuum leaks is to get a 3 foot length of hose and use it as a stethoscope. Put one end by your ear and move the other end around the various vacuum connections. You'll hear a definite hiss when you get close to the leak.
Be very mindful and careful of the fan belt while you're doing this, however. No loose clothing and hold the hose loosely.
Be very mindful and careful of the fan belt while you're doing this, however. No loose clothing and hold the hose loosely.
