Not shifting at WOT, fuel problem?
Not shifting at WOT, fuel problem? Hi guys,
I have a problem with a LT1 corvette. At WOT, it'll get to about 5k RPM and just hang there. It feels really down on power. Other than that the car drives just fine. I was thinking it was perhaps a fuel issue. primed it will go to about 35 psi and slowly drop. Running it is at about 35 psi and at WOT it jumps to about 40 psi. Is this normal?
I have a problem with a LT1 corvette. At WOT, it'll get to about 5k RPM and just hang there. It feels really down on power. Other than that the car drives just fine. I was thinking it was perhaps a fuel issue. primed it will go to about 35 psi and slowly drop. Running it is at about 35 psi and at WOT it jumps to about 40 psi. Is this normal?
12 Second Club
Joined: Feb 2012
Posts: 419
Likes: 4
From: Long Beach, MS
Hi guys,
I have a problem with a LT1 corvette. At WOT, it'll get to about 5k RPM and just hang there. It feels really down on power. Other than that the car drives just fine. I was thinking it was perhaps a fuel issue. primed it will go to about 35 psi and slowly drop. Running it is at about 35 psi and at WOT it jumps to about 40 psi. Is this normal?
I have a problem with a LT1 corvette. At WOT, it'll get to about 5k RPM and just hang there. It feels really down on power. Other than that the car drives just fine. I was thinking it was perhaps a fuel issue. primed it will go to about 35 psi and slowly drop. Running it is at about 35 psi and at WOT it jumps to about 40 psi. Is this normal?
I wouldn't think fuel.
So the whole fuel pressure thing is fine? Any way I could verify valve float? I don't think it's the 3-4 clutches it does going from 1st to 2nd or 2nd to 3rd I believe. I wasn't thinking it was a transmission issue because during regular driving it shifts fine, no slipping or anything.
11 Second Club
Joined: Jan 2010
Posts: 1,707
Likes: 13
From: New Orleans, LA
So the whole fuel pressure thing is fine? Any way I could verify valve float? I don't think it's the 3-4 clutches it does going from 1st to 2nd or 2nd to 3rd I believe. I wasn't thinking it was a transmission issue because during regular driving it shifts fine, no slipping or anything.
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12 Second Club
Joined: Feb 2012
Posts: 419
Likes: 4
From: Long Beach, MS
If it was the 3/4 clutch pack there wouldn't be issues with the 1-2 shift, just 2-3, right?
Also, if the trans was slipping and not shifting you would be hitting the rev limiter, well above 5000 rpm, right?
Do you have a way to get a datalog?
That would show you if the pcm is commanding the shift, and a better idea of what is going on.
Also, if the trans was slipping and not shifting you would be hitting the rev limiter, well above 5000 rpm, right?
Do you have a way to get a datalog?
That would show you if the pcm is commanding the shift, and a better idea of what is going on.
Mine was doing this exact thing. It would not shift at WOT so i had to back off the gas to let it shift then get back on it. I dont remember what it was, but it was a trans issue. I think 3/4 clutch pack.