suggestions for 88 BII problems

[gdw1591]

I am working on my son's 88 BII with 2.9 (auto). Had a bad leaking front seal, which I replaced. However I used the three piece pan gasket that came with the front cover gasket set. It looks as if the rubber gasket that goes between the pan and the front cover where the front seal is must have moved (gasket did not have a grove for the raised section of the pan) and although used tacky sealant and waited until it set, the pan is now leaking below the front seal. So, it looks as if I will need to drop the entire pan and put a one piece gasket in. Do I need to need to remove the intake plenum so that I can raise the engine to get the pan off? I was told that I did not need to remove the distributor, only the cap. Can I leave the distributor in place?

The second question is about a hesitation that we are experiencing when accelerating in any gear. The hesitation generally occur above 2,500 rpm to 3,000 rpm when driving and accelerating. The revs drop up to 500 rpms and only last for a second or two and then the engine come back and will continue to rev. It does not happen every time, but often. We have replaced the fuel filters and the fuel pressure at start is 40 psi, dropping to 30 psi. We have replaced the cap, rotor, plugs, wires. This has happen before and after trans rebuild and in any gear. I am wondering about the ignition module. It occurs when engine is fully warmed up. There does not appear to be any misfire. The rpms, tach and engine just drop out for a second or two and then they all return. Does not seem to happen at steady speed, only when accelerating.
Thanks for any suggestions.

 

[a88b2on33s]

i have the hesitation problem too and i havent figured it either and ive replaced everything that you have and the ignition module..so if you figure it out please let me know.

 

[Bronco_Chuck]

check your TPS (throttle position sensor).