1st gear fine,2nd gear fine,3rd gear breaking up
#1
Staging Lane
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Join Date: Nov 2006
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1st gear fine,2nd gear fine,3rd gear breaking up
Motor is 441 lsx and car will go to 7000rpm in 1st and 2nd but when you shift to 3rd and it gets to 6000rpm it starts to break up.I`m confused! Car was fine on dyno but has new problem as of last week.
Engine specs:
13:1 comp
lsx/ls7 heads with comp 921`s
251/266 110 lsa 623 lift
TH400
BS3
5000 stall
Engine specs:
13:1 comp
lsx/ls7 heads with comp 921`s
251/266 110 lsa 623 lift
TH400
BS3
5000 stall
#2
It's breaking up in the higher gear because you are loading the engine more, it's in a different part of the map. Try scanning the engine while in third, and check the A/F with a wideband if possible.
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#9
TECH Fanatic
You could look at fuel pressure during a run, since its breaking up on you the wideband will be useless. I am not really sure what to tell you man, hope you figure it out. I still got to test mine out again to see if its fixed. I put vp 109 in mine and it was better but it seemed like it still had that hesitation after shifting.
#11
TECH Fanatic