walbro 190 fuel pump

[99V6solaraSE]

So i just installed the fuel pump... man it took me forever!
and having a dremel to modify the end cap wouldve definitely saved some time. I also had to go out to walmart to buy some crimp connectors cuz i didnt have any. A lotta the clips were bitches to take off.

But i eventually got it done... i took it our for a drive and i heard that high whine or ringing noise that was mentioned in this thread as well "http://www.solaraguy.org/viewtopic.php?t=34402&highlight=fuel+pump+noise" I could definitely hear it cuz i left the backseat off with the lid slighly open for easy access in case something went wrong. Id know if it something did go wrong right?

and i dunno if was just psychological but the pull felt a lil stronger... should i feel anything installing this? All i have for performance mods is the CPE and jims fuel mod. And also recently got the dogbone with the bushings in it.

btw thx SCv6... i basically bought all the mods i have now from him except the cpe. Still waiting on the torque rod from jim and the midpipde that UPS lost

[SC V6]

congratulations on the installl.. glad the parts worked out well for you...

you would know if the install went wrong, because your motor would cut out from no fuel.. I did it when I put my stock fuel pump back in.. had to change some o-rings...

again, glad everything went smoothly for you.

[Dawgz]

im curious to see what people have to say on the fuel mod on a Stock car.

If our stock fuel pump isnt good enough, cause if thats so, i'd probably do mine considering im boosted, but my a\f on the dyno after tuneing was on point for the most part.

[Eye8Pussies]

the stock fuel pump is more than enough for a stock 1mz, but it's not a bad idea to get a walbro anyway since it's cheaper than buying and oem replacement if yours poops out

when boosted, a walbro is a REALLY good idea since the gen4/solara has a returnless system

[Somedude]

the stock fuel pump is more than enough for a stock 1mz, but it's not a bad idea to get a walbro anyway since it's cheaper than buying and oem replacement if yours poops out

when boosted, a walbro is a REALLY good idea since the gen4/solara has a returnless system

The fuel pump usually doesn't poop out right? I never hear people changing fuel pumps like a maintenance thing.

[Dawgz]

the stock fuel pump is more than enough for a stock 1mz, but it's not a bad idea to get a walbro anyway since it's cheaper than buying and oem replacement if yours poops out

when boosted, a walbro is a REALLY good idea since the gen4/solara has a returnless system

i guess ill get one when i up the boost, because for now my a/f tune isnt being hindered by the stock pump.

[CamryOnBronze]

wouldnt you need to tune after installing the walbro pump? or would the car compensate for the change?

[Dawgz]

wouldnt you need to tune after installing the walbro pump? or would the car compensate for the change?

its not gonna be spewing out more gas for no reason, i would think its just an extra push in the line. So it probably wouldnt need a Tune after the install.

[CamryOnBronze]

well if it isnt pumping more gas it seems kind of pointless to upgrade it, but I dont know a lot about it... thats just why I asked. If it is pumping the same fuel as stock, why do you need it?

[Eye8Pussies]

yes, it will be pumping out more gas than the stock pump

your a/f is controlled by the ecu, but it gets to the point where the pressure in the rails are high enough that the ecu can't lean it out to what it would normally run

the unfortunate thing again, is that the gen4/solara has the returnless fuel system with a built-in fpr at the pump so your ability to manually "tune" the fuel pressure up or down is pretty much null, and if you're running rich, there isn't much you can do.

if you're running lean, then you have the people crimping their stock fpr to creat more pressure


and dawgz -> you're fine now, but once you get all your problems solved and put down the power that you should, you may find that your car will lean out on the top end since that is what most people report, and your safc tuning will only be able to compensate as much as your stock fuel pump will allow

[Astro]

Yeah Dawgz, that's where I'm at. My max a/f hit 17.5, I was leaning out so bad with the Walbro 190lph pump and the Supra injectors, so I decided to go with 255HP pump and RC Engineering 370cc injectors (was thinking about the 440cc). I'm thinking the lean condition maybe due to having the Supra MAF and maybe the bored TB and TB spacer. But, it might have been something else...
So, I decided while I'm at it, I'll work on a return fuel system with an Aeromotive adjustable FPR w/1:1 boost port

[Eye8Pussies]

^ that's the way to go....you really can't beat a return-style fuel setup, especially with rising boost pressure

with that and no tune, I can hit afrs of 10 at WOT and 6psi if I don't turn my fuel pressure down

I can't wait to install my supra maf, since it seems as though it can make a huge difference

[TMMK Toy]

EYe8, you have a return style fuel system? Did you modify your 1mz for that or are all gen3s like that? Also, if you did modify, how extensive was it?

[Astro]

Anything '96 or older had a return type fuel system. I'm in the middle of doing my '00 Solara, so I'll let everyone know when it gets done. Most MR2 guys who've done the 1MZ swap have been doing this forever. They're taking the returnless style fuel rails and drilling/tapping the ends. However, I'm trying something new. Which is using '96 rails, but only the 2 rear rails, because the stock setup have the regulator mounted on the front. It should work, if it doesn't, I'm going to have do it that way also.

Check out this page, nice work and engine:
http://www.bryanf.com/MR2/fuel.htm

Tapping fuel rail (1/4" NPT) for return line

1MZ VVT-i V6

[Dawgz]

so wats the benifit from a return style fuel setup?