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914World.com _ 914World Garage _ flat spot in RPM

Posted by: ynotdd Aug 20 2003, 08:24 AM

I have a 73 914 2.0. The engine has less than 1000 miles since rebuilt. I have a problem at about 3600 to 4000 rpm it falls on its face then once passed that to pulls fine. I have replaced the throttle switch, pressure sensor, injectors, points, condenser etc. problem still there all i can think of is temp sensorII or vac lines. please help. Tony:confused: :mad:

Posted by: Brad Roberts Aug 20 2003, 12:24 PM

Did they resuse the stock (probably worn out) distributor ??

I say dump the points... but I need to know if the timing mark shows up nicely when you time it..or if it is bouncing around when your trying to time it.

B

Posted by: ynotdd Aug 20 2003, 12:27 PM

the marks were solid no bouncing

Posted by: Brad Roberts Aug 20 2003, 12:29 PM

Where did this "new" pressure sensor come from ??

Dump the points.. not worth keeping them.

B

Posted by: nebreitling Aug 20 2003, 02:23 PM

i'm having these same exact symtoms -- my flat spot is at ~4600rpm. pulls great beyond that (although i cant' get it past that spot in 4th or 5th gear). MPS checks out okay, TPS seems clean enough, engine runs great otherwise. all electrical grounds cleaned. as soon as i get some time, i'm going to have a good going through of the distributor. i've been told that slop from a worn distributor shaft can cause this. as long as i'm at it, i'm going to install a crane pointless ignition. $90 on summitracing.com.

let me know if you resolve this, i'll do the same.

nathan

Posted by: ynotdd Aug 20 2003, 03:57 PM

The PS was from dont yell AA
put the old one back no change

Posted by: Brad Roberts Aug 20 2003, 06:05 PM

These issues are tough.. it could be fuel related or ignition related. I tend to believe its ignition related. You could have a bad spark plug wire or somebody could be running the fuel pump off the coil (robbing voltage for both).

B