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Rough ide stalling - what hose is this?

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Rough ide stalling - what hose is this?

 
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Old 09-19-2018, 12:57 PM
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Rough ide stalling - what hose is this?




Been stalling with rough idle lately. Thinking vacuum leak. What hose is this in pic? The one that connects to engine and runs behind throttle body over to vacuum drum? My hose is extremely dry rotted and brittle. Should local auto parts store have it in stock?
 
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Old 09-19-2018, 01:04 PM
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What are you working on? What do you mean by "vacuum drum"?
 
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Old 09-19-2018, 01:07 PM
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Originally Posted by glc View Post
What are you working on? What do you mean by "vacuum drum"?
yeah I dont know. Prolly shouldn't have called it a vacuum drum. Not really working on anything. Found this hose terribly deteriorated and need to replace it. What is the hose called? So I can look it up online or ask the local auto parts store if they have it.
 
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Old 09-19-2018, 04:50 PM
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ok just went to two local auto part stores (autozone and oreilly's) and neither one could even ID the hose.
I honestly don't know how those brick and mortars stay in biz!.

anyhow, so did some additional troubleshooting. while engine running i remove the hose and there is a good deal of vacuum being sucked from the engine connection side.
The hose is so old and worn it was collapsing under the pressure. I'm sure it is the problem to my idle/stalling situation.

BUT what part is it? what do i refer to it as for my online searches or to order from dealer?

thanks!

 
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Old 09-19-2018, 05:29 PM
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The OP is working on a 2008 F-150 FX4 that has a 5.4l 3V V8.
It's the purge line. Purge Line - Ford (5L3Z-9D289-A)


 
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Old 09-19-2018, 07:22 PM
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Thx. I got it replaced with regular non collapsible fuel line. Did not solve my rough idle stalling problem
however.
 
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Old 09-19-2018, 08:39 PM
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When I asked what you were working on, I was asking what year and model truck you had. You need to create a signature or identify your truck in every post you make asking for assistance.

Rough idle and stalling? Check for codes, how many miles on the spark plugs?
 
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Old 09-19-2018, 09:30 PM
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Originally Posted by glc View Post
When I asked what you were working on, I was asking what year and model truck you had. You need to create a signature or identify your truck in every post you make asking for assistance.

Rough idle and stalling? Check for codes, how many miles on the spark plugs?
sorry. 2008 Ford F-150 fx4. 5.4 with 135k miles.
Plugs are brand new. Just changed along with all new coils and boots. It did not fix my rough idle and stalling issue.

I do have a p0420 that has kept the service engine light on for the last couple years but the truck has run great until now despite that.
i think am at the point to buy a new passenger side cat and replace it myself to resolve that code. Have I done damage by not fixing that before now?
 
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Old 09-19-2018, 10:17 PM
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If the cat is plugged, that sure could cause it. Take it to a muffler shop and get both sides of the exhaust tested for excessive backpressure. The throttle body may be sticking and need cleaning.
 

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