Help!! car cranks really long then starts

[kingofqueenz788]

hi this is Joe, I have a question for the zine.
When I start my car it takes 4 -5 seconds to start. Cranks cranks cranks thrn finally it starts. After sitting for an hour or so it does the same thing. But if I start it and turn it off then start it again, it starts back up rite away in 1 second .I have no codes, I have had this issue since my 044 fuel pump was installed like 5 years ago I think!

[f4m0u5]

You could add a check valve to keep the fuel in the fuel line coming from the tank, or you could also try priming ur car before starting it(key forward for 5 Seconds then back to off then back forward for 5 Seconds and then try starting)

[kingofqueenz788]

where can I get a check valve from ?

[kingofqueenz788]

I have herd of this before and I feel like this is the problem

[AudiSport12]

You're losing fuel pressure. If you put the car in accessory for several seconds before you crank to prime it, does it start right up?

[kingofqueenz788]

Yes it will start rite up I feel like u gues are rite what's the check valve look like so I can put this in !

[01audia4]

I have this issue. I had an 044 now a lph450 pump. Changed my crank sensor, FPR, & coolant temp sesnor. Sometimes my first crank starts it up right away sometimes not. Problem normally exists after I drive it and start it up about an hour or so later. I'm lost, sounds similar. In for suggestions.

I am stage 3 - doesn't happen on my e85 tune, Idk if you are tuned but I have read my 93 fuel trims are probably off during warm start - I've played with lemmi but still did not help.

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[AvantGuard]

You may want to make sure you don't have a leak somewhere near the engine that could cause a fire at some point.

[kingofqueenz788]

https://store.034motorsport.com/bill...lications.html

It says it comes with the check valve which one is it ?

[AudiSport12]

Seeing bad gas mileage? Smell fuel at all? Could be a leaky injector. Seen this happen before with same symptoms you have.

[kingofqueenz788]

No gass is fine and injectors are new happened with my old ones as well. No smells

[julex]

Like said above, since your problem started right after 044 installation, somebody forgot to install a in-line check valve so you're losing fuel pressure. Unlike virtually all aftermarket pumps on the market, 044 doesn't have a built in check valve.

[kingofqueenz788]

Yes I agree with this where can I buy this check valve

[julex]

this might work, but ask 034 first:

https://store.034motorsport.com/fitt...p-adapter.html

[christianb5s4]

I have the same issue, I bought this one which is the OEM 044 check valve. Haven't had a chance to install yet.

http://www.amazon.com/gp/product/B00...ilpage_o01_s00

[christianb5s4]

Another cause could be a vacuum leak, to confirm you need to look your long term fuel trims on vag-com. If they are over +/-10%, could be an indication of a leak assuming your fueling isn't an issue. However, if the check valve is bad I could see that being a hindrance to fuel flow so that could also cause problems.

I'm installing my new check valve next week so will report back.

[ed@4induktion]

My car has had the same issue since install. Recently found a pin hole size leak in the fuel line outlet at the pump allowing it to bleed off pressure. Replaced the line and it now starts after a half a crank everytime.

[dannyn424]

use the 044 check valve, i got mine from 034 its now on my fuel filter and keeps my pressure fuel up!!! i have a walboro 450 btw

[treysgreen]

Mine does it too on a cold start. Just turn the key on for a few seconds before trying to turn it over.

[kingofqueenz788]

Ok so I bought an inline checkvalve for the soft line outside the fuel pump and also a new check valve kit from 034.
This should do the trick!

http://www.amazon.com/gp/aw/d/B01862...el+check+valve
https://store.034motorsport.com/bill...osch-60mm.html
http://www.bmwe34.net/E34main/Trouble/535ihot_start.htm

[christianb5s4]

Nice, I saw that BMW DIY too but I don't want the check valve already in there to stay in especially if it's not functioning properly. So I'm going to use the Bosch check valve and keep in the original location.

[jturnbull]

Get the cap in this DIY. A legit 044 should already have the check-valve built in. Just need the cap

http://forums.quattroworld.com/a4/msgs/85051.phtml

[axnjaksn]

hi this is Joe, I have a question for the zine.
When I start my car it takes 4 -5 seconds to start. Cranks cranks cranks thrn finally it starts. After sitting for an hour or so it does the same thing. But if I start it and turn it off then start it again, it starts back up rite away in 1 second .I have no codes, I have had this issue since my 044 fuel pump was installed like 5 years ago I think!

have you ever replaced the fuel filter??? just a thought

[kingofqueenz788]

All fixed ;$

[f4m0u5]

All fixed ;$

Added a check valve? Or was there a problem

[zillarob]

Maybe dude is a wizard

[01audia4]

All fixed ;$

What was the fix?

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[kingofqueenz788]

The hose clamp on the fuel pump was not holding pressure