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engine bog in reverse and at 55+mph

N

NeversummerCO

NAXJA Forum User
Location
Northern Colorado
Its an '87 with an '89 engine (4.0 I6), auto 242. It will move in reverse but not very fast, even when floored, engine studders or bogs. In Drive, it drives fine until about 55MPH then does the same thing. Almost like it hits the speed govn. over and over again.

Replaced:
fuel filter
cap, plugs, wires, etc.
cleaned TB
fuel pressure runnig with vaccume 30psi
Removed Cat. converter

Thoughts?
sensor (throttle body / CPS)?
fuel pump?
 
NeversummerCO said:
Fluid is full, that's what I though it might be as well. Aslo found something else. When I press down on the transmission dip stick the engine starts to click. Any ideas?
Click to expand...
Fuel pressure should be 31# and 49# with vacuum off.
 
not yet, I'll try that also. I found my bell-housing bolts are really loose, one is missing. This would make sense why it only happens in reverse and at high speeds. CPS is not reading correctly. I'll update once I get those bolts in, I think that's the problem.

Thanks for the help so far.
 
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