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RPM at 800 , in drive
can you race motor in neutral, to 2500 rpm
?
1: does rpm rise above 1500 in drive and no movement, (slip and bad tranny)
2: or holds about 1500 but can move. (brakes frozen , with ice)
try to push car in neutral on flat ground, can you>
no , the brakes are iced.
yes, then engine power is bad.
with A/T trans, you get to first find out.
1: is engine weak.
2: is tranny slipping (races to very high rpm and no go)
3: or brakes ices, (post location so we can see climate, duh?
I looked at info for 1500--5.7L engine. 6 psi @ 1000 rpms 18 psi@2000 rpms 24 psi @ 4000 rpms
Sometimes, you can use analog gage in place of oil pressure sending unit and double check oil pressure that way. If oil pressure is actually low, if high mileage engine, I doubt replacing oil pump will help. I just wanted to add, check oil pressure engine warmed up.
Sounds like maybe a motor mount may have broken,if you open the hood and put the car in drive ,then neutral then reverse the engine should only "rock" about an inch or so,if it really jumps that is the problem.
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