walbro 255 problem

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Dec 16, 2008 | 12:25 PM

hnaskoct

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From: louisiana

walbro 255 problem

well i have ordered a walbro 255 pump and since i installed it my car doesnt crank up on my first key turn what could this be,

Dec 16, 2008 | 10:37 PM

Lonnies Performance

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The pumps do take a little more time to prime. This is not uncommon.

Does it hold pressure after you shut the car off, or does it quickly drop pressure? If it drops quickly, you may have an internal leak in the tank.

Dec 17, 2008 | 02:46 AM

juniorssrollin

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i have a walbro in my 96 impala and while it does take a split second longer than the ACdelco to fire after cranking, it runs alot better.

Dec 17, 2008 | 06:31 AM

koolaid_kid

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I have a fuel pressure gauge, and I turn the key to ON and wait until I see good pressure before trying to start the car (about 1-2 seconds). Works out much better than just going all the way to crank right off the bat. YMMV.

Dec 17, 2008 | 08:56 AM

hnaskoct

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Quote:

Originally Posted by Lonnies Performance

i try cranking the car up about 3 times...after it runs for a while when i cut it off and try cranking it back up it doesent crank right up

Dec 17, 2008 | 11:05 PM

Lonnies Performance

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Yes,
But you did not answer my question.... I need more info to be able to help you.

Dec 18, 2008 | 04:33 AM

koolaid_kid

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hnaskoct, you need to check the fuel pressure. If you don't have a gauge in the car, I believe there is a Schraeder valve on your fuel rail that you can connect to. On the LT-1, it is the back center. Not sure on an LS-1. Borrow a portable fuel pressure gauge and collect readings, then report back in this thread. I suggest you also watch how long it takes to build pressure from key on, engine off.