if you could help me, i would thank you profusely, i have a 87 190E 2.3 that we bought cause of the cherry condition and great price, it runs perfect except for one thing, after about a mile it dies but will start up right away and run perfect for another mile or so, i replaced the filter and external fuel pump and only run superunleaded in it and have changed the wires and sparkplug,rotor etc.the last owner had the exhaust system removed but only put back on the muffler and catylitic converter, also the fuel pump is so loud that at an idle, it is louder than the radio,is this normal?. other than this problem it runs like a new car is there another fuelpump that i am missing or is a sensor acting up from the incomplete exhaust system,if left to idle it never dies only when you are moving.thank you for any help or advice you can give me. Paul.

 

As I'm sure you are already aware, several things can cause this problem.

Here's a few things to check that hopefully will get you back on the road.

Make sure the O2 sensor wiring is not coming into contact with the drive shaft causing a short in the circuit board of the fuel pump relay.

Check Crankshaft Position Sensor & wiring - Upper drivers side of the bell housing area
Check timing
Check connections to the Coil
Check the plug connections for the fuel pump relay and overload protection for loose connections, moisture and or corrosion.

One thing to check for is the production date on the Crankshaft Position Sensor, if the number on your is lower than 642 it is recommended that you replace the sensor with one with a later production date.

If it's 642 or higher, test the sensor and the cable assembly for an intermittent open/short. Nominal resistance values should be between 680-1200 ohms at room temperature.


This should give you a few things to try.

Hope this helps,
Cheers,
TJ

Your CPS should be in the same place as this pic.





[IMG]local://upfiles/5574/032A18213A774997832C662DD43608AE.jpg[/IMG]

 

fuel shortage.

connect a fuel pressure gauge and see the reading when the engine is about to stall.