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fuel injector install probs

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gstspyda97

15+ Year Contributor
148
2
Sep 30, 2004
Vandalia, Ohio
hey guys hows everyone doing?

today i installed my lucas 550ccs, my car runs fine at idle but i also installed my B&M FPR which was set @ 43 psi according to the fellow tuner i bought it from, so i started trying to tune my MAFT with the 550ccs, but when i went to compensate for the injectors it ran nicer set @ 450 but after i hit WOT it seems my car was quicker with the 450ccs and now kinda holds back and sputters kinda like boost kicks in stops and then kicks back in :confused: , im thinking bout taking the FPR off and going back to 2g stock, but it may just be my tuning(im tuning off my logger) so if any one knows what a good suggestion would be(mods in pro)

thanx in advance :rocks:

alex :thumb:
 
only real way to know what your fuel pressure is, youll need a fuel pressure gauge. What are your fuel trims according to you logger?
 
5% LTFT, -1 STFT but it moves during accleration, let me do a better log and ill come on here with a good post thanx for the quick response
btw i have a B&M Gauge, i just didnt have light to put it on so i should prolly do that :tease:

alex
 
yea i figured my tuning would be a major problem with it :shhh:
so the ever famous question ill post some logs and then can you guys give me a lil help on where my maft BASE,IDLE,MID and WOT settings should be im still really new to tuning :thumb:

alex
thanx for all the quick responses guys!
 
update:

alright i took off the B&M FPR and put on my stock 2g FPR now my car is running much better(full boost by 3100(17 psi) and not one stutter :D i zeroed my maft out also, its still wet here and im FWD so i cant get traction if i do a 2nd or 3rd gear pull :tease: , but as soon as it dries up here ill try to post a log of the new injectors thanx for all the help guys :thumb:
 
ok so i just installed an EVO 3 and also put the 550ccs back in 2 days ago and @ idle my car has a lumpy sound almost if i have aftermarket cams, i dont know if bigger injectors are supposed to do this or if im not compensating for them enough....i have my MAFT 1.3 set @ 4 for 550ccs and everything else zeroed out but im still getting the lumpy sound
what could be the problem?

Alex
 
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