30# injectors, stock pump
#1
30# injectors, stock pump
i have a high rpm miss. i have the cam in my sig with a new acdelco opti. it has a base tune on it for the 30# injectors but thats it.
im not sure exactly what my tuner did while he was in there but long story short i had a bad opti and couldnt fully tune the car. the rev limiter is disabled and skip shift is disabled. those are the only things i know for sure have been done. i have tryed putting a few different stock replacement pumps in and it helped for like a day but that was about it.
it only happens under WOT. if i lift my foot off just a little it wont do it at all. it happens from about 5500-6500. the car has the stock fuel pump and wiring with brand new new style red top injectors, new acdelco fuel filter, it had a delfi pump in it and i replaced it with an airtex under warrenty.
im short on cash and want to get the car retuned and i want to know if a pump or hot wire kit is necessary. anyone have any experience with this?
im not sure exactly what my tuner did while he was in there but long story short i had a bad opti and couldnt fully tune the car. the rev limiter is disabled and skip shift is disabled. those are the only things i know for sure have been done. i have tryed putting a few different stock replacement pumps in and it helped for like a day but that was about it.
it only happens under WOT. if i lift my foot off just a little it wont do it at all. it happens from about 5500-6500. the car has the stock fuel pump and wiring with brand new new style red top injectors, new acdelco fuel filter, it had a delfi pump in it and i replaced it with an airtex under warrenty.
im short on cash and want to get the car retuned and i want to know if a pump or hot wire kit is necessary. anyone have any experience with this?
#6
well i can tell you it was working perfectly fine before the cam and injectors yea fuel filter is brand new acdelco. i was about to go out and make a ground strap just for ***** and grins to see if it helps. the problem is kinda intermittent tho. every once in a while i can run it from a dead stop into 5th and it will run fine. other times it will barely gain any speed up top. it seems to run better with a full tank. im not really sure how that makes sense but thats what it does
#7
TECH Veteran
iTrader: (246)
well if problem was AFTER you installed the cam and fuel injectors it could be ur injectors....r u sure they are 30's and are they used...they might need a reconditioning..
r all the hoses connected at the pump????and the charcoal canister...are there any pinched rubber hoses after the pump or did you or could u have cut the hose in the pump accidentally......definately a fuel issue
r all the hoses connected at the pump????and the charcoal canister...are there any pinched rubber hoses after the pump or did you or could u have cut the hose in the pump accidentally......definately a fuel issue
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#8
i bought them from a guy on here but they wer in the original box. SVO red tops, the new design all the hoses are connected. but i got under the car to check all the canister i pulled on the bigger one an heard a hissing sound but idk where that line goes it looks like it goes to the top of the tank but i can find the other end. (i have the panel above the tank cut open to make this stuff easier)
#9
TECH Veteran
iTrader: (246)
well there is a hose that is on the very top of the fuel tank that will need to be connected it basically wraps around to the charcoal canister and you have 2 other lines which are the stock gm plastic hard lines.......if that has a purge leak at the top of the tank i have seen 2 cars personally that never set a a po440 code...but did miss like hell on top end..