Installed my 255 pump today

[1fast97gsx]

I went to ams today and picked up a 255 hp pump. I put it in and started the car up. It took several cranks for it to start which I was expecting, however the pump doesn't make the annoying whining noise like most walbro 255s do. I know this may not even be a bad thing, but it seems a bit unusual so I still want to know why I'm not getting that loud annoying whine. The car also takes an extra 2-3 cranks to start now than it took before the fuel pump install. What could cause this slow/late start up issue and the quiet pump? The car seems to run a lot richer than before and also fixed the launching problem I've been fighting for the past year so it's definitly working. Is a fuel pump either it works or it doesn't, or could I have still made a stupid mistake somewhere?

 

[1badtsi]

youre running way to rich if youre not metering that thing somehow

and you cant hear the pump cause its under a 2" cushion

 

[UPGRADED2G]

I dont know why you're not getting that annoying sound. Mine is like a mosquito that never dies. ! But my car does take a while to start, just like u described.

 

[1fast97gsx]

youre running way to rich if youre not metering that thing somehow

and you cant hear the pump cause its under a 2" cushion

Well my ecu is chipped for 780s and a 255 pump at 43 psi so I should be ok except for when I'm at idle. All the cars with 255s I've been in the pump was VERY easy to hear even under a cushion.

 

[WatchItExplode]

Maybe you could use a AFPR?

 

[SethA]

My 255 was quiet when I first installed it (audible only at idle). After a few months it got louder (audible most the time). Aside from a rewire, my fuel system is stock other than the pump. I am not sure why the sound changed or why it was quiet to begin with. You should enjoy your quiet pump while you have the chance.

Seth

 

[sweet97]

Well my ecu is chipped for 780s and a 255 pump at 43 psi so I should be ok except for when I'm at idle. All the cars with 255s I've been in the pump was VERY easy to hear even under a cushion.

I just got a dsmchip and though mine is set for a specific base psi I did not see any option for a fuel pump. I would check that out on the dsmchips forum. An AFPR really would be in order here as the pump flows a much larger volume than stock. I would look into it. Nice pump isn't it? mine has bit of a whine to it, in a'93.

 

[maximumbob]

I don't know why you can't hear it either...my car sounds like KITT from Knight Rider.

 

[heavyD]

The 255 lph pump in my Eclipse is loud & whiny but so is the 195 lph in my Talon. Strange how yours is quiet. If your car is taking longer to start you may want to remove the pump and check the O-ring as it may not be seated properly. You should lubricate the O-ring before you put it in.

 

[1fast97gsx]

Yea I too was thinking the O ring may be my starting problem, however why it's quiet I don't know. I've heard that if you have it rewired it for some reason quiets it down so maybe that's why? I'll try a new O ring later today though.

 

[AMS Eric #2]

Yea I too was thinking the O ring may be my starting problem, however why it's quiet I don't know. I've heard that if you have it rewired it for some reason quiets it down so maybe that's why? I'll try a new O ring later today though.

IT FIXED THE LAUNCHING PROBLEM!!!!!!!!!!! Sweet man! When the fuel pressure is down, have someone crank the car while you watch the gauge. See how fast pressure builds up, and how fast it bleeds off when the pump stops running. It should build to base within 2 seconds if not faster, and take 30 seconds or more to bleed back down to near zero. If it does one of the other any differently, that O-ring might be leaking.

 

[1fast97gsx]

Yea I was very happy about the launching problem fixed, however the slow cranking kind of bothers me. I tried putting my old O ring on which didn't appear damaged and still the same slow starting problem. I was thinking about cutting a hole in the fuel pump assembly cover and running a 5" long piece of rubber fuel hose straight from the pump to the hard line ( which I would need to also cut ) and use hose clamps on both ends. That way no leaks for sure. What would happen if the power and ground wires going to the fuel pump are reversed? I figure the car wouldn't start then, but I'm not sure. My car didn't have a stock connector anymore, so I had to put on some female disconnects and slide those over the terminals on the pump ... that's why I was thinking maybe I could have reversed them, but I figured then the pump wouldn't kick on at all and the car wouldn't start? Could it be that I just got a bad pump?

 

[1fast97gsx]

On a sidenote .. I'm still using a stock 2g regulator which most likely is being overrun.

 

[oldman]

On a sidenote .. I'm still using a stock 2g regulator which most likely is being overrun.

That's what everyone have been trying to tell you the entire thread, there are no fuel pump setting in an eprom chip.

 

[AMS Eric #2]

On a sidenote .. I'm still using a stock 2g regulator which most likely is being overrun.

Throw a 91+ rail and regulator on it for now. That will take care of most of the overrun problem. The 255 hp pump can overrun the 1g regulator too, but not NEARLY as bad as the 2g. Plus its a simple 15 minute swap and should take care of the starting problem.

 

[1fast97gsx]

Alright I'll do that later on this week. Are the turbo and n/t 1g fuel rails the same? Launched the car again last night after putting in a new clutch ... it launches awesome now!

 

[AMS Eric #2]

Alright I'll do that later on this week. Are the turbo and n/t 1g fuel rails the same? Launched the car again last night after putting in a new clutch ... it launches awesome now!

The bare rail itsself is the same. If you have an aftermarket intake manifold you can use any year 1g rail. The NT regulator has a higher base pressure, which is good for some people. I am running an NT regulator personally.

 

[kgtalon95]

My Whinboro is doing the same thing and causing a very long crank. Do you guys thinks its my o-ring also? I have an afpr so I know its not being overrun.....er I hope its not.

 

[4g64GST]

I could not see anywhere about the pump being rewired but if it is that is the problem.

when you use a relay to rewire the pump there is a small delay from the time you hit the key to the time the pump has power and that is where you get the few more cranks.

if it's not then I dont know for sure.

 

[1fast97gsx]

yea my pump is rewired, but I never had problems with my 190 pump rewired and haven't heard of anyone else having problems with a 255 because it's rewired. If someone with a rewired 255 could post in here and tell us how long theirs takes to start it would be helpful. I will go to the junkyard thursday and find a 1g regulator / rail. Thanks.

 

[swarm]

My 255 is not rewired. I have no starting issues, and my pump does not whine.

 

[truwarrior]

I have a 190 nonrewired and mine makes a wwwwoooowwwwoooowwwooo sound. Kinda like a high pitched whine then like a low pitched whine. I switches back and forth 3-4 times a second...anyone else have this?

My guess is that fuel pressue increases then the regulator is releasing orelse voltage is goin up and down from the alternator...?

 

[maximumbob]

Mine does the pitch changing thing also. I think its a voltage thing because I can make it change with my headlights coming on and off. On a side note when I didn't have my dead time set right(DSMLink) on my 880's my car really hated to start, as in 7 cranks for the first fire then crank again and it would run. Now it's much better only a little more hesitant to start then stock. My point is that with an eprom your deadtime may not be 100% correct because, it varies between sets of injectors, how much it caries? I don't know but my is significantly different than it would come if you ordered a chip from dsmlink preprogrammed for 880s.

 

[daren_p]

Mine does the pitch changing thing also. I think its a voltage thing because I can make it change with my headlights coming on and off. On a side note when I didn't have my dead time set right(DSMLink) on my 880's my car really hated to start, as in 7 cranks for the first fire then crank again and it would run. Now it's much better only a little more hesitant to start then stock. My point is that with an eprom your deadtime may not be 100% correct because, it varies between sets of injectors, how much it caries? I don't know but my is significantly different than it would come if you ordered a chip from dsmlink preprogrammed for 880s.

The guys that are having problems with it taking a long time for your car to start, is this all the time? or will it take a long time the first time but if you shut off the car & then try and start it again it starts up fine? If so you may have torn one of the orings on the fuel pump which may cause the pressurized fuel to leak back, causing you to turn the car over alot before it starts the first time.

 

[Tallen]

I'm not going to read all this nonsense, but the new Walbro's don't whine.