UK Car Repair: 1988 Mercedes, fuel modules, relay switch


Question
It turns over but wont start.

This is the deal.

One morning I woke up to go to work and the alarm went off. I could not disable the alarm so we manually did by unhooking it under the passenger side floor board.

Then the next time we tried to drive it - it started it was driven two blocks to the gas station, turned off and it never started again. it was towed home from the gas station.

We got a new fuel pump and we checked the fuel modules and all seem ok. It is like the signal is not getting to the fuel system to get it to work. It will turn over but not start.


Answer
Hi Colleen, did you re-hook the alarm back up because the chances are that the alarm has a built in immobiliser and that switches the ignition and fuel pump off, check the relay switch for for the pump (should be on the inner wing/fender) but my suspicion lies with the alarm.  - Good luck -Paul