Once my 98 malibu warms up fully check engine light flashes why is this

Engine is gas starved so check fuel filter or fuel pump.

Check Engine Light/Misfire Due to Intake Valve Locks ...

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Jeep Liberty Check Engine Light/Misfire Due to Intake Valve Locks/Valves. ...Misfire cyc 4 and random cyc misfires, changed coil packs and plugs... sounds as if rod ... Light came on again (misfire on cylinder 4) - switched coil from 4 to 2. Light ...

Jeep Liberty Questions - Cylinder Misfire code - CarGurus

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CarGurusMay 27, 2009 - #4 misfire new plugs and coil pack on #4 light came back on after 300 miles if ... How come it stopped misfiring for 2-3 months, and now is back? ... I have a 2005 Jeep Liberty 6 cylinder, engine light came on scaned the codes ...

Liberty Cylinder Misfire / Computer issue? - JeepForum.com

Take it back and have the codes read(or better, have it diagnosed). Probably got a new cat for nothing.

Some of these vehicles had issues with water getting under the hood through the seal at the cowl panel and getting into the back spark plug tubes, once the engine warms up and the water evaporates the engine will run fine. There is a replacement seal thatyou can purchase to solve this problem. Hope this helps.

If the CEL is flashing, the cause of this feeling is undoubtedly an engine misfire. On a Crown Victoria, the CEL only begins to flash when a misfire is detected. Too much misfiring can damage the catalytic converter. This is a warning designed to avoid said damage.

Going to have to start by checking for fault codes.

A flashing cel indicates misfiring. A common problem is a bad ignition coil. The easiest route for diagnosis is the check the trouble codes(autozone and some other parts stores will scan for free, or an OBDII code reader is not too expensive to buy). The code should tell you which cylinder is misfiring(PO301 means cyl #1, 302 cyl #2, etc). Once you know which it is, swap the ignition coils around. If you have a #1 misfire, swap coils 1 and 4, clear the codes, then check it again. If the misfire moves, you know you've got a bad coil. If the misfire is air or fuel related, as with an intake leak, other codes should come up as well as the misfire.

stop by local parts store (Autozone,Advance, etc) and have them do a free fault code test. They can print out a list of faults and clear the codes

do a compression test then do a combustion pressure test if all good computer is questionable

you may have a faulty crankshaft position sensor this is what controls the firing of the plugs. you may also have corrosion on the plug for the coil pack causing multiple misfires