There are several reasons why this may happen.
1. check your timing
2. fuel flow / fuel preasure. carb is not operating properly.
3. depending upon the load your engine may no longer be strong enough to pull it.
W/ 360 engine,my 1988 GWweighed 4480 lbs.
In a 1987 it's under the steering column, to the left. Hope it's the same for the 1988.
the v8 is 14.0 qts
twenty gallons
inside the alternator
Driver side
20 gal
Dana 44 front and rear
Ford Motorcraft 2 barrel
The firing order for the 1988 Jeep Grand Wagoneer with a 360 engine is 1-8-4-3-6-5-7-2. The spark plugs should be connected in this sequence for proper engine operation. The distributor rotates counterclockwise, and the number one cylinder is positioned at the front of the engine on the driver's side. Make sure to verify the connections to ensure optimal performance.
With an AMC 360 V8, it is 5000 pounds
in the middle towards the back. my 88 has a yellow dipstick.