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Smitty91 02-16-2009 09:52 PM

91 with no compression?
blew the head gasket so i put a new one on and everything works but she wont fire over. fuel in the rail spark and air all working. Did a compression test and i am showing 0 in all 4. is this because i did not have the head milled down? because on this year the block is cast and the head is alimunim? all helo greatly appreciated!:confused:

jpdocdave 02-16-2009 09:58 PM

the engine and head are all cast. if you have 0 compression that thing would sound very funny cranking, it would be very fast. i doubt its 0, possibly testing wrong or gauge is bad. by just changing a head i can't see what would possibly cause no compression. even if the head was warped, and valves were toast you would get some compression, 20 or 40 or something.

scrambler1 02-17-2009 01:02 PM

I would stear to checking the compression tester,than check valve adjustment. Maybe that was overlooked during the final assembly.

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