Fuel pump works about 90% of the time but then no fuel pump, any ideas

OBD code of: "P1250- PRC Solenoid Circuit Malfunction. Which malfunction of Fuel Pressure Regulator Control unit. PRC is located
by the fuel pump by the left side on the bottom rail under some plastic you will find it. PRC costs about $90.

Hi Dan,I use to have a couple of Chevettes,great on gas,Here's a link on your fuel pump removal,never had a issue with that,on these,you have to change the timing belt every 3 years ,the belt will stretch and jump time and the plugs will get fouled,here's another link on your timing belt if the fuel pump replacement doesn't work,also check your spark plugs. Repair Guides Carbureted Fuel System Fuel Pump AutoZone com Here's the timing belt link. Repair Guides Engine Mechanical Timing Belt And Sprockets AutoZone com

Check fuel pressure. If ok then go to ignition. If low fuel pressure, then its either:

• Fuel filter
• Fuel pump relay
• Fuel pump

Ignition:

1. Coil
2. Ignition module
3. dist. cap and rotor button if equipped. (give a good tuneup)

90% sure its fuel related

Fuel pump is where I would check next. Your mechanic can do a fuel pressure test to verify this is a fuel problem.

my truck has a 4.9 engine 90 model f150 pickup it just stoped fuel pump is working and got fire it will turn over but wont start why

Put a crank sensor on it to fix. They get hot and stop working. Next time it stops pour or spray some water on it and try to start it. Old trick to solve problem

fuel pump faults,=one way valves not seating properlly
diaphrams puntured, blocked with dirt from tank ,fuse gone in feed ,no earth return to body, try along these thoughts,

key may need reprogrammed

Try changing the fuel filter, first. If that does not work try replacing the pump. Also make sure you run 91 or higher octane.

BMW cylinder torque setting all models

According to my service manual as follows.

Cyl head to engine block (torx e12 M10 bolts)

Stage 1 30nm (22 ft – lb)
Stage 2 + 90 degrees
Stage 3 + 90 degrees

Cyl head to lower timing chain cover 10nm (89in – lb)

The tightening sequence is from inside to outside crossover as normal. Loosening sequence is from outside to inside crossover. Remember to set torque wrench at low setting and work gradually up through the whole sequence until you get the desired torque.