Oil Light

I've got a 97 3400 Transport and the oil light is flickering when idling @ normal temp. The motor seems to be loping @ idle as well. Any hints to what is wrong?

Oil light means low pressure. The oil pump is driven directly off of the cam shaft so a low idle speed could drop the oil pressure dangerously low. It also could be a faulty oil pump, failed pressure relief valve at the pump stuck open, or a faulty oil pressure sensor.

those were my thoughts too, but what about the motor loping at idle?

Donno on that. Could be one of many different things. Failing coil, faulty plug or wire, stuck EGR, low fuel pressure or clogged injector, MAP/MAF sensor failing, vacuum hose unhooked/has a hole, etc...

Donno on that. Could be one of many different things. Failing coil, faulty plug or wire, stuck EGR, low fuel pressure or clogged injector, MAP/MAF sensor failing, vacuum hose unhooked/has a hole, etc...
Just replaced coil, plugs, wires, egr, fuel pump, pressure regulator, rails, injectors. Tested and OKed MAP/MAF sensor.

Also there is this very noticable click about very 3-4 sec sounds like its coming from Cyl. 6. I have checked the knock sensor and seems to be functional. There was no abnormal wear on the plug when changed.

Have you done a compression test? You may have a cylinder going bad causing both the low oil pressure and the loping at idle.

have not, planning doing that this weekend.

let us know what you find out.

anyone in the memphis, tn mind giving me a hand?

well if i find out i have to do a tear down. i think i may try to swap it for a L48 out of 75 vette thats been bored,stroked, and ported w/ 750 holley double pumper and chevy hei distributor. i like the sound of 375 hp and 328 ft/lbs in that little beast