98chrysler cordoba wiring diagram when engine gets warm it starts to run real bad and when it is doing this my rpm gauge goes to bouncing already changed fuel pump. Need to know what electrical component controls the rpm gauge.

Idle air solenoid and/or intake vacuum leak.

The RPM gauge is an electrical component that appears to be malfunctioning and has nothing to do with the car starting. the engine runs on fuel along with spark to the spark plugs to ignite the fuel. the RPM gauge only gives you the actual RPM of the engine when it is running but in your case the RPM gauge is not functioning which indicates the gauge is faulty.

At first I would suspect a VSS (Vehicle Speed Sensor) problem due to the flashing gear indicator and no speedometer. However, that won't keep the car from running. Check all the ground wires in the engine compartment.

At first I thought VSS (Vehicle Speed Sensor), which would explain the flashing gear indicator and no speedometer. But that wouldn't cause a no-start issue. Check all the ground connections in the engine compartment. And then under the dash if the problem persists.

the best way is that your RUN the scanner/computer for real diagnostic and fix it. However I see that replace has nothing to do with the display. see the diagram attached.
God bless you

79 chrysler codoba ? don't think its a fuel problem ! I can't believe a cordoba ????????/ really ? I knew someone who had one, white w/ blue interior ! WOW ! after all these years, I need to wrap my head around this . give me a minute ! this bucking violently sounds so familiar ! I'm thinking electrical, BAD COIL, when it overheats, it comes & goes ! spark plug wires need replaced also ! what type of distributor ? replace cap / rotor ! whats in distributor , points ? electronic ? ignition module ? I'm so intune with todays cars, can't remember ! TIMING may also be an issue ! have you checked all the VACUUM HOSES ? EGR valve ? TODAYS FUEL is bad for this vehicle ! need I say more !

Sounds like an electrical problem, make sure the ground leads to the engine are good and the battery terminals are clean. It might just be a bad connection in the wiring harness try jiggling the connections to see if it makes the gauges jump when it is running.

My car would do the same thing turned ot to be a loose wire at the coil/distributor. there is a plug connector with tow wires one wass loose I crimped the wire no works great

Your Body Control Module could be going bad.

You probably have a faulty sensor at the transmission.

Go to your local parts store, and they can give you the part and how to install it. It's pretty easy.