20 Most Recent 1994 BMW 318 - Page 8 Questions & Answers

Do you hear your pump running? (humming sound from the rear) If not and if you are sure your pump is ok, then there could be faulty pump relay. Find it and replace it with another known good one. Usually there are the similar ones in the box for other systems so you can swap. If not, then you can directly power the pump up, by removing the relay, taking a short strip of say #16 wire and jumping the contacts directly in relay socket. To find which pair of pins you have to jump look at the relay and find a diagram. There will be a pair which goes to the relay coil, and another which just a contact. You need a contact ones. Jump them and try the ignition, this in most cases should turn you pump on, and you will be able to start the car. Next step is to check the relay. Ideally you have to have a pair of leads with "crocodile" clamps to connect relay coil directly to 12V source. Once connected, check continuity at the controlled pair if pins (contactor). If relay is good, than you have a bigger problem. Your ECM does not send a power to the relay, and this could be because of the internal fault, or DTC code stored in it. For example if you have an electrical radiator fan, then your ECM testing it each time you turning ignition on, and if the test result is negative, then ECM shuts down your pump as a precaution measure.

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i heard you can heat it up then it can have a better give

Could be many things, fuel pump failing, injectors blocked, ECU problem, a garage can help you diagnose the problem. You can buy a fault code reader to plug in that may help diagnose the issue fairly quick, personally I would take it to the garage.

check for either cam or crank sensor,or fuel pressure.

EDC 03792

HIYA COULD B A NUMBER OF THINGS TRY THE CRANKSHAFT SENSOR FIRST IF THE CAR HAS A LOT OF MILES MABY CHECK THE FUEL PUMP AND THE RELAY THEN THE COIL TO SEE IF THE CARS GETTING A SPARK MOST THINGS YOU CAN CHECK YOURSELF

Sounds serious, get it to a tech specialist and get the front end/suspension/tyres/tracking all checked out.First check you can do is check the power steering reservoir is correct level, if not top up, run steering from lock to lock check level again, see if there is any improvement.

It could be the pump, or you could also be low on power steering fluid. First off, check the level of the fluid and make sure it's adequate. Next, you can "burp" the power steering system easily, which will get rid of any air bubbles that could be in there. Easiest way is to jack the front end off the ground (both wheels), start the engine, take off the power steering fluid reservoir cap, and turn the wheel side to side as far as it'll go, several times. This circulates the fluid through the system and pushes any bubbles in there up to the reservoir, where they'll float up to the top and "burp" into the air.

If neither of those things works, you may have problems with the steering rack and pinion, or possibly with your suspension (check the tie rods, inner and outer, as well as the bushings in the various suspension pieces).

run fault codes and look for cam/crank positions sensor problems.

sounds like a electrical problem, if you turn the key to the on position have a friend open the gas cap & listen to sound like a hum when you turn the key to on position if not then you should look for a bad fuse or a bad electrical connection.

Those symptoms sound a lot like a cylinder misfire. To make your life easier (and to verify it is indeed a misfire, have the OBD system scanned by the dealer, reputable shop or auto parts store (AutoZone will sometimes do it for free) to find out which cylinder(s) are having issue.This issue usually happens when one of the following things occur. Start checking in this order. 1. You have a fouled spark plug, remove and replace2. You have a bad ignition coil, remove, replace3. You have a cracked engine block, or leaking head gasket, pressure test each cylinder to determine.4. There is an issue with some component in the exhaust gas calibrarion (MAF, O2 sensor). A computer diagnostic will tell you which component.

Your brake booster isn't getting enough power. Get this checked asap, it could lead to complete brake failure.

Check your coolant level., if its good then verify the thermostat in the cooling system is opening up when the engine is hot.

check for a loose connection in electrical , esp. battery post negative and positive sides