[DML] Engine trouble

[rob.van.der.veer@xxxx]

Hi,

I own a '81 DeLorean and I'm having some recent problems with the
performance of the engine.

When I cold-start the engine, it starts in one go, but then I have to
let it run for about a minute or two to let it become stable. When I
start driving with it, the engine has full performance and really kicks
ass. But when the engine has been running for about 10 minutes or so,
there is a dramatic drop in power; suddenly the engine won't do more
than 4000 RPM; and then it gets worse by the minute. Last week I had to
drive home (14 Km) with a maximum of 1800 RPM (Which requires serious
driving skills imho).

I think it has something to do with the engine heating up and the
fuel/air mixture or something with the injection system.. 

The strange thing is my Dad drove it for about 100 Km on the highway
without any problems whatsoever.

As far as I know it doesn't have any modifications like a turbo or
such. 

Any suggestions?