97 Challenger engine cutting out..

[apeman426]

Hello everyone,
I am new to the forum, and I thank any help I can get.
I have a 97 challenger 1800 with twin 110's. The port side engine runs and starts relatively easy but has a miss in it when it builds rpm. After a couple of minutes of running it just flat out dies. It will not restart until I remove the DESS key and stick it back on, then i fires right up and runs fine until it comes under load again, at which point it begins to miss about once every 10 seconds.

So far I have changed spark plugs and changed fuel filter. The plug wires are good and on the plugs well. Next I was going to swap ignition coils, and the the start/stop switch. I fear that it could be the MPEM. Does any one know what is involved in changing that out?

Thank in advance.

 

[Dr Honda]

changing an MPEM is easy... but it's very expensive.


Since you have 800 engines... I'm going to tell you to check the pick-op coil on the flywheel. on that engine, they are known to break free from their mount. when that happens... it will start with a miss, and eventually die as it vibrates away from the flywheel magnets.

 

[apeman426]

Thanks I will definitely check that first.

How much does an MPEM cost? Where is there a good place to get one?
Do you need software to talk to it so you can get the DESS keys to work?

Thanks again.

 

[apeman426]

Thanks, I will definitely check that first.

How much does an MPEM cost? Where would be a good place to get one? Do you need special software to make the DESS keys work?

Thanks