oil pressure and brake issue
06-26-2008, 08:57 PM
#1
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Car: 1991 Pontiac Firebird
Engine: 383 LT1
Transmission: built 700r4 and fuddle 3500stall
Axle/Gears: 4th gen 3.42 auburn
oil pressure and brake issue
I have been driving my car around for a while now with the lt1 and it runs well but i have found that if i slam on the brakes they dont work... may be vac related new motor has a nice sized cam... and also when i nail the brakes or even when i just get on them enough to lean the car forward my oil pressure drops to nothing.
Its got a melling hv oil pump and rockers that have flow restrictors in them so its getting good oil pressure otherwise and most of it is staying down in the bottom end not a lot goes to the heads... what could be causing this?
the brake issue is probably just loss of vac pressure but im not sure what would cause the sudden loss of oil pressure???
Its got a melling hv oil pump and rockers that have flow restrictors in them so its getting good oil pressure otherwise and most of it is staying down in the bottom end not a lot goes to the heads... what could be causing this?
the brake issue is probably just loss of vac pressure but im not sure what would cause the sudden loss of oil pressure???
06-26-2008, 11:11 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Are you losing the power brakes after having been on the throttle hard?
The oil pressure problem is your oil pump pick-up has fallen off of the oil pump.
The oil pressure problem is your oil pump pick-up has fallen off of the oil pump.
07-02-2008, 08:54 PM
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Car: 1991 Pontiac Firebird
Engine: 383 LT1
Transmission: built 700r4 and fuddle 3500stall
Axle/Gears: 4th gen 3.42 auburn
Re: oil pressure and brake issue
Pickup falling out of the pump.... ghey
guess im pulling my oil pan this weekend
The brake issue has been resolved i put in a disk rear out of a 4th gen and bleed the hell out of it and no more problems.
guess im pulling my oil pan this weekend
The brake issue has been resolved i put in a disk rear out of a 4th gen and bleed the hell out of it and no more problems.
Last edited by gapimpin; 07-02-2008 at 09:11 PM.
Happens all the time next time put a few spot welds on it.
07-03-2008, 07:31 PM
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Car: 1991 Pontiac Firebird
Engine: 383 LT1
Transmission: built 700r4 and fuddle 3500stall
Axle/Gears: 4th gen 3.42 auburn
Re: oil pressure and brake issue
dont have access to a welder right now is there anything else i can do to keep it from falling out?
i hate dodges but thats one thing they have on chevy the pickup tube is threaded so no chance of it falling out....
i hate dodges but thats one thing they have on chevy the pickup tube is threaded so no chance of it falling out....
07-03-2008, 10:07 PM
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Car: 1992 camaro
Engine: LT1
Transmission: 4L60E
Axle/Gears: 3:73
Re: oil pressure and brake issue
I guess you could put some jb weld on the outside
of the tube befor you drive it in.
of the tube befor you drive it in.
07-06-2008, 12:54 AM
#7
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Car: 1991 Pontiac Firebird
Engine: 383 LT1
Transmission: built 700r4 and fuddle 3500stall
Axle/Gears: 4th gen 3.42 auburn
Re: oil pressure and brake issue
well got it resolved after 13hrs of work.... had to pull the motor off the mounts to get the pan out then found out that knocking noise i had been hearing wasnt the pickup bouncing around....
Found one of my main cap bolts had broken about 1/2" into the block lucky for me it was too long to fall out and get hit by the crank.
ended up having to drill it out and replace it with a new grade 8 bolt so it was a long day but hey atleast i can use my brakes now without oil pressure dropping to nothing and i found a problem before it killed my motor.
Thanx for pointing me in the right direction guys.
Found one of my main cap bolts had broken about 1/2" into the block lucky for me it was too long to fall out and get hit by the crank.
ended up having to drill it out and replace it with a new grade 8 bolt so it was a long day but hey atleast i can use my brakes now without oil pressure dropping to nothing and i found a problem before it killed my motor.
Thanx for pointing me in the right direction guys.
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