soo..ive got a...technical question. and this is a little out of my comfort zone to diagnose on my own.
now i understand how a fuel system works. but on the supra, with that vsv valve er whatever it is. im scratching my head. heres what my symptoms are..
at wot i am experiencing hesitation, kinda....cracking and popping if u will. and every once in a while it will backfire when shifting lets say to 3rd from 2nd when just crusing around. this is a new symptom and is getting worse. it will "miss" if u will while driving now and when it does this miss, the fpr guage shoots way to the right around 16.0 plus. then comes back down.
info on my cars fuel system, walbro 255 on stock fuel system. literally. 440's, stock afm, stock fuel rail with new fpr and fpd. my goal was to get the highest hp outta stock fuel system other than the fp.
my question is... exactly how does the supras fuel system work. meaning what role does this vsv valve play in the operation of the fpr? if any. have i surpassed the limits to what the stock fuel rail or fpr can handle by adding the wb255? and can i by pass the vsv valve and hook the fpr up to a diferent vaccume sorce. or..should i just do the common upgrade for the fpr?
i have looked for this on here, and nothing really fullfilled my question. if i can get video to load on here i will go to my buddys kyle and well beat the piss outta the car with some vid so u can see. untill then... can someone shed some intelligent light on this for me please??????????!!!!!!!!!!!!:1zhelp:
now i understand how a fuel system works. but on the supra, with that vsv valve er whatever it is. im scratching my head. heres what my symptoms are..
at wot i am experiencing hesitation, kinda....cracking and popping if u will. and every once in a while it will backfire when shifting lets say to 3rd from 2nd when just crusing around. this is a new symptom and is getting worse. it will "miss" if u will while driving now and when it does this miss, the fpr guage shoots way to the right around 16.0 plus. then comes back down.
info on my cars fuel system, walbro 255 on stock fuel system. literally. 440's, stock afm, stock fuel rail with new fpr and fpd. my goal was to get the highest hp outta stock fuel system other than the fp.
my question is... exactly how does the supras fuel system work. meaning what role does this vsv valve play in the operation of the fpr? if any. have i surpassed the limits to what the stock fuel rail or fpr can handle by adding the wb255? and can i by pass the vsv valve and hook the fpr up to a diferent vaccume sorce. or..should i just do the common upgrade for the fpr?
i have looked for this on here, and nothing really fullfilled my question. if i can get video to load on here i will go to my buddys kyle and well beat the piss outta the car with some vid so u can see. untill then... can someone shed some intelligent light on this for me please??????????!!!!!!!!!!!!:1zhelp:
