93 240 missfire help

[jfreas89]

i picked up a 93 240 the other week with 170k put a new valve cover gasket plugs wires cap rotor tstat and waterpump in it. I was driving it to work and took it to about 6k went to shift once in gear car sounded like a subie. Sounds like a crazy hard miss and pops flames. HELP! also car has no cat and 3" exhaust
Modified by jfreas89 at 7:25 AM 12/10/2009

[liquid_cool]

your timing may be to retarded and is not burning fuel properly...or you have an RF issue with signal to fire your coil at higher rpms..or..you may have a crank angle sensor going inside the dizzy...just 3 options to test..hope this helps.

[jfreas89]

ok so i had it running and went down the line and pulled plugs when i pull #3 nothing changes in idle. I ran a compression test and have 175psi so i check spark and its getting spark im lost now

[rioredstang]

Check your injectors. You may have a dirty or stopped up injector. You can listen for them clicking with a screwdriver, or you can pull the rail off a crank the engine over and watch the spray pattern.

[liquid_cool]

Check your injectors. You may have a dirty or stopped up injector. You can listen for them clicking with a screwdriver, or you can pull the rail off a crank the engine over and watch the spray pattern.

this is a valid teast..but if you dont find anything wrong with the injectors...then pull the dizzy and get a testor out and test that crank angle sensor..there is a way to test it in every service manual out there..its a common issue.