A couple days ago my car devloped a miss and was shaking real bad so im like ok I can deal with this so I pulled the plugs and they were kinda fouled and they were cold plugs cr43ts so i put in cr45ts and that didnt fix it it was still shaking bad so i ohmed all the wire and the turned out fine but it was running better but still shaking so i looked for vacuum leak and the was one at the base of the card and I repaced the gasket and the leak went away but the shaking didnt what else could it be I dont think its the timing but iI cant relly check that because the guy I bought my motor from just pulled a balancer out of a big pile and it was the wrong one and the timing mark is of could this be the problem but it ran fine with that balancer for a while at least through break in but im out of ideas and Im stumped

 

What would be a real big help would be to put some info about your car, your engine, what you have done to it so far, what parts you have in it etc, in your profile to help us. We can't read your freakin' mind!

 

ok sorry its a 87 t/a with a rebuilt 5.7 stock internal HEI dist new cap and rotor moroso wires edelbrok 1406 600 cfm carb w/ a 1 inch spacer and hedman headers but ive been workin on it and its still missing on #3 it just devoled this miss real suddenly when i was ideling

 

If everything is new from the rotor to the #3 plug, you are going to have to do a compression test. Do a search of "compression test" for how to do this.

 

thanks i did the compression test and i had the same reading as all of the other cylinders i took the valve cover off and #3 intake spring was broken so i went ahed and threw a used one on i had laying around till i can get all new ones or take the good springs off my other engine

 

oh and that fixed it thanks for you help