Did walboro - now my car takes longer to start?

AbrahamLincoln

Registered
ok, i replaced my old fuel pump with a walboro 255. Before I started the job, my car always used to turn on very quickly - which I liked about it. Only till I was running high speeds did i notice that my car didnt want to go anymore (136) also down low it would be bogged down a smidge at wot. But it always started right up even when cold. I replaced the fuel filter with a Fram G7596 around the same time. However, didn't have the crank problem after doing the fuel filter change.

its not that its unusually long, but its longer than before the pump job? any ideas - i dont get paid for another week and the first thing im getting is a fuel pressure guage. but its definetly after i did the fuel pump that the longer crank started. also i began to smell sulfer smells after doing long wot's. if it aint broke! eh tell me about it...
 
Could be a few things.

But first get a fuel pressure test. Just make sure things are up to snuff.
 
If you do a leak down test you will likely see the problem.

Several components work to maintain fuel pressure in the rails when the engine is off. There is a check valve at the fuel pump that could be leaking. The pressure regulator and injectors also may be a source of losing pressure.

Try turning the key on for a couple seconds to cycle the fuel pump before turning the key to start. Try again cycling the key on for a couple seconds, back off then back on again for a couple seconds before trying to start. If it starts quicker, the fuel system is likely losing pressure when turned off.
 
ok, i replaced my old fuel pump with a walboro 255. Before I started the job, my car always used to turn on very quickly - which I liked about it. Only till I was running high speeds did i notice that my car didnt want to go anymore (136) also down low it would be bogged down a smidge at wot. But it always started right up even when cold. I replaced the fuel filter with a Fram G7596 around the same time. However, didn't have the crank problem after doing the fuel filter change.

its not that its unusually long, but its longer than before the pump job? any ideas - i dont get paid for another week and the first thing im getting is a fuel pressure guage. but its definetly after i did the fuel pump that the longer crank started. also i began to smell sulfer smells after doing long wot's. if it aint broke! eh tell me about it...

Sulfer smell usually means you are running so rich that fuel is making it to the cats. And a longer startup after installing a more powerful pump could indicate a pressure regulator failure (may have busted the spring). I'd guess your regulator went out, but check the pressure to make sure.
 
ill try that right now because my car is cold, cylcling through the key with out going to ignition to build up the pressure. More than likely its just running real rich because it probably blew the fpr. i know that it tore the stock rubber hose that connects the walboro to the fuel pump bracket at first( i reused it like a goof thinking it would work) it split it right up the side. That walboro really puts out :)

Fpr - ok that makes sense, because of the richness as well - i dont think i have a lack of fuel pressure probably a bit too much, i also have grey wires. more than likely more wires ore original (they say motorcraft on them) and possible the spark plugs... so maybe im not keeping up with the fuel?

ill keep you posted, and ill do the tests and get back to ya - thanks. -Ryan
 
If you suspect the fuel pressure regulator, one check is to pull the vacuum line off and check for presence of fuel. If you have fuel on the vacuum side, the diaphram is ruptured.
 
ok i primed it 5-6 times and it started up pretty quickly, im not sure how warm it was though - im going to try it again tomorrow morning. Can you tell me more about this check valve at the fuel pump that could be leaking?
 
this problem and the richness have to be related... because I wasnt getting the sulfer smell untill after the walboro. which i interpreted as I am now getting the correct fuel for the mixture and its the plugs and wires that arnt up to snuff.
 
which i interpreted as I am now getting the correct fuel for the mixture and its the plugs and wires that arnt up to snuff.

I would have to say that if you do what driller said above and you dont find any fuel inside the vacuum portion of the regulator (where the vaccum line plugs in) then you really should put a set of plugs and wires on the car.

Modifying a car that isn't in a proper state of tune, {plugs wires filter etc} really opens up the possibility of more problems and alot of "backtracking".

So.. before you carry on with Modifications, do the normal stuff first.
Otherwise your just running around in circles chasing your tail.

Do a FULL TUNE UP, that way we can rule out any issues with you car, that makes troubleshooting FAR simpler and less aggrivating for everyone concerned.

I really cant believe you put 410 gears in that car before you did the first plug change.
 
i have a bible thick book of records... before i did the walboro everything was peachy. I'm going to get the regulator right now, hopefully it wreaks of gas from the vac line. What's this check valve on the fuel pump? Can you elaborate on that some more?
 
pulled fpr vac line, smelled a hint of fuel, put it back on... cold started - it started up right away to my suprise... however it is nice out today about 60 degrees. let it idle, i pulled the vac line off while runniing no fuel wetness. put it back on gave it some light rev's (no wot) pulled it back off no wetness no smell. so i think i'm ready to rule that out.

At this point - im not gonna post anything about this until i get some colder plugs and new wires on there. but by that time ill have money for a fuel pressure guage and then we'll realy see what time it is! :)

i have to go redo some stuff to the fuel pump because of the levler float I broke a wire, so im reinstalling a new one as soon as I can get one... so if i pinched the walboro at the inlet - and a chance to double check all lines and fittings etc
 
You really need a pressure gauge to determine what the issue is and then a manual to troubleshoot the real cause.

The check valve at the fuel pump is integral to the pump(built in).

This link may help.
 
i have a brand new pump, why would the check valve thats internal to the new part be bad?

links helpful, i probably have a hose that fell off or something stupid because my tank is pressuring properly, i can tell this when i take off the gas cap. link is very helpful btw
 
fpkow1.jpg
 
Those couplers are for the harness, if you need it. Some need to mod the harness. With the Mark it seems to be a direct connection.

That filter is the wrong one BTW. Did yours look like that?
 
Check valve is not the valve to check. It's not on the rail, it's in the pump outlet. It might be missing for all you know. It's actually removable (not internal or built in). Most Walbro pumps don't have it from what I've seen.

That filter looks right ... or looks like any other m8 filter I've seen.
 
Most Walbro pumps don't have it from what I've seen.

My walboro will leak down fuel rail pressure within moments of turning the car off.

But the 255LPH pump has no problem "recharging" the fuel rail and I have no "long start issues".

have heard leak down was a problem, but mine has done it since day one.
 
Did you have a look inside the outlet ... you'll see a check valve in there that's removable. I should have a picture of it somewhere.
 
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