WBB
New member
1992 Typhoon
Recently bought truck has been sitting 2 yrs. and would crank but not start. Replaced plugs, rotor, cap, leads, and fuel filter. Will only start with shot of brake cleaner, after warm will start on own. Afterwards it will idle although fluctuating 800-1200 rpm. It has a severe off idle stumble and is not drivable, but by feathering gas it will rev high and smooth, above 2000 rpm (with no load) it does not have this hesitation problem ??? Scanner shows no codes but timing advance is 24 deg. at idle??? When throttle is opened quickly off idle engine stumbles, advance dips breifly (fraction of a second) to 10 deg. and then up to about 34 deg. full advance and egine revs high. Throttle body and plenum cleaned. Vacuum lines inspected and replaced. Compression 150-160 psi all cyl. Removed exhaust to test but same. Any ideas ???
Recently bought truck has been sitting 2 yrs. and would crank but not start. Replaced plugs, rotor, cap, leads, and fuel filter. Will only start with shot of brake cleaner, after warm will start on own. Afterwards it will idle although fluctuating 800-1200 rpm. It has a severe off idle stumble and is not drivable, but by feathering gas it will rev high and smooth, above 2000 rpm (with no load) it does not have this hesitation problem ??? Scanner shows no codes but timing advance is 24 deg. at idle??? When throttle is opened quickly off idle engine stumbles, advance dips breifly (fraction of a second) to 10 deg. and then up to about 34 deg. full advance and egine revs high. Throttle body and plenum cleaned. Vacuum lines inspected and replaced. Compression 150-160 psi all cyl. Removed exhaust to test but same. Any ideas ???
