botlfed

Newbie needing help. I have a 93LX 5.0. Bottom end is stock other than a Comp cam. I have Roush 200 cast heads and a cobra intake. BBK CAI, BBK 70mm TB, Pro M 75mm. meter. My gas pedal stuck and hit the rev limiter. Now I have a dead miss from #4 cyl
I have checked the plug, wires and distributor. All seem to be working. What are your thoughts on my problem. No unusual noise coming from the valve cover but I havent pulled it yet.

PRO50SC

Do a compression test on that cylinder.

botlfed

What should I be looking for in the compression test. Thanks

88blackgt

lower than normal compression

PRO50SC

hatchdemon89

do what he says lol jk he's right though he told me the same thing it will determine if ur cylinder is shot or not did it to mine an it helps

88blackgt

haha he asked so i told him

redneckstang

if a compression test shows loss ofcompression you may have valve spring issues. you also may not find any loss of compression which could mean a broken spring. listen to see if you hear any unusual noises coming from that set of springs. if needed remove the valve cover for further analysis. a broken spring is easy to fix

88blackgt

+1 on taking the valve covers off to check things out