Q7 MK 1 Discussion - Cranking amps drop - So this is actually weird I had a battery replaced coded 850cca showing almost the same on meter, the amps drop on the terminals under the hood to 360-400 but voltage remains the same, car struggles to start when engine is warm, checked without any load on the battery 850cca However, bad alternator, clogged fuel filter, broken starter, blown fuse, empty gas tank, immobilizer error, or any fault in the electrical system can also cause your vehicle not to start. 1. Weak Battery. If your TT’s engine won’t crank or cranks very slowly, then the most likely culprit is weak or dead 12v battery. Changed intake camshaft due to lobe damage. All went well except now the engine will not start. It will crank and crank but not ever fully turn over. Ran compression test and 180 across the board. I expect the problem is fuel related but can't seem to narrow it down. Checked the the fuse and relay for the fuel pump. Q7 MK 1 Discussion - Audi Q7 'no crank - So for a short story i took a turn and the steering wheel got heavy the car turn off message appears has ebs malfunction gearbox limited function low voltage batt and then car did not crank at all i just replace the battery leaving the computer connected with a jumper but still The three most common faults with no stored codes for engine cranks continuously but does not start: Fuel Pump. Fuel Pump Relay. Crankshaft Position Sensor. The electric fuel pump is easy to hear if you listen for it spinning inside the fuel tank. If the fuel pump makes no noise with initial ignition on then test pump and relay. pMcjvZ2.