MDToy

hello - I did the dollar bill test on the exhaust and there was a lot of Popping (constant) pop papop poppop.. What do i do now? My truck is an 85 w/22re 63000 Original miles - I bought it used - Truck has been sitting for a long time. I've already done a tune up (plugs, pcv, rotor, cap, wires) - What should be my next step?

superjoe83

did it ever try to suck the bill up to the exhaust pipe

MDToy

Yes the bill was being sucked up against the exhaust, thus causing the popping - Is this a sign of MAJOR problems?

superjoe83

you either have a burnt exhaust valve or they are out of adjustment, try adjusting the valves first, if that doesn't fix it, then you will need to remove the head and have a valve job done to it

MDToy

Thanks SuperJoe83 - I'm totally new at this, but I'll give it a try. I never did anything more that a basic tune up before I bought this truck, but I just recently (with Yotatech's help) replaced the calipers and rotors successfully.

Anything tricks I need to know before I open the valve cover??

Bigblock

you need to do a compression test. they should all be about 110 psi.any low cylinders will be your bill sucker.be advised a dead miss will also do that,as in crossed up plug wires.if one cyl does have low comp then check valve clearance. it could be held open or burnt.