toyotanick

i am having issues under boost and was wondering if anyone else has had this problem. because the 3.4 is not designed for my truck i was wondering if the factory fuel pump can handle the demands of the charger.

i am running a secondary fuel but am just wondering if any of you guys happen to know about the factory fuel pump.

snobdds

I think most guys go up to a walbro fuel pump...which one I have no idea.

I know "Slacker" has some 3.4 with supercharger swap threads that has the answer to your question.

slacker

iTrader: (1)

I use the OE in my trekker , with no problems with fuel supply at all . I also had a bit of "ping" with 92 octane , so I now use 94 . havent had any problems at all , but i'm also not driving it every day ! .

walbro is your best option for fuel supply , and what is recommended by URD and others



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vital22re

iTrader: (2)

the oem 3.0 fuel pump is not good enough. I ran it for a while but found out quickly it was maxing out just to keep up with the 2.3 oem pulley. Right after I upraded to a walbro 190 my afr's got richer almost a full point.

toyotanick

wow, ok and i should definatelly be running premium also haha. i will immediately start looking into one of those 190 walbro's

my afr's are outrageous right now! I'm anywhere from 14 to 16 not in boost.

toyotanick

is any 190 walboro the same thing? just making sure, because they also say some sort of make or model.

slacker

iTrader: (1)

http://treperformance.com/search.htm...yota+fuel+pump

try one of these


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toyotanick

so you are saying to use an external pump instead of mounting a new 190 inside of the tank?

slacker

iTrader: (1)

no .. these are internal pumps

slacker

iTrader: (1)

have a peek here

https://www.yotatech.com/forums/f209...-build-250286/



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toyotanick

very nice. my biggest difference is that i am bored out a little and that i am running methanol. but it only kicks in when there is boost just like the 7th. the methanol can't keep my afrs low because the truck itself has a stupid high afr before boost starts.

i will probably order the walboro 190 in a few minutes

toyotanick

the only 190 pump is Item #: GSL-391 and 400-939 that is an inline pump.

toyotanick

all of the pumps on this page are 255's i dont think that is necessary right? like i said, i am not running the 7th injector, i am running methanol injection so i dont need to push that extra injector.

slacker

iTrader: (1)

yep 190 will be just fine .. sorry , might not have been the best link to send you to



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toyotanick

is there any possibility that you can point me to the correct page?

Dirt Driver

So? Low load isn't taxing the pump and those AFRs are lean to improve fuel economy. What exactly are "issues under boost?" What does the AFR do under boost with methanol injection?

slacker

iTrader: (1)

This is the one I just used on that build I posted , http://treperformance.com/i-133110-t...1993-1998.html THIS is the one i would recommend + it's on sale



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