after replacing the head gasket i took the car for a test drive and the car began misfiring first then when i got home after 5-6 miles an switched it off it wudnt start again, then relised no fuel pump working, crossed relay and pump is working ok,replaced all relays and still same results.so i replaced the ecu and still no good?? also ive hooked the car up til a computer and no fault codes are found in either ecu?? help!! lol
2006-10-30 09:14:39 · 11 answers · asked by Anonymous in Cars & Transportation ➔ Car Makes ➔ BMW
Could be a fusible link.
2006-10-30 09:25:04 · answer #1 · answered by Goofy Goofer Goof Goof Goof ! 6 · 1⤊ 0⤋
If there's no faults codes all the sensors for the crank and camshaft should be ok, but i would recheck as you Will not get a spark or switch the fuel pump without a signal from either. the white relay under the cover next to fuse box is the main power supply relay for the engine management system, if you swapped the relays make sure you used the right relay in the right connector. However the most likely cause is the you have not connected or the left earth wires on the N/S suspension turret loose.
2006-11-03 08:52:01 · answer #2 · answered by bmwdave 1 · 0⤊ 0⤋
Look for the emergency cut-off switch. Your manual will tell you where it is. Push it back down. Sounds like its come up somehow and isn't falling down properly. Its designed to cut off all fuel and air to the engine in the event of the car rolling. If its got a working fuel pump, a working ECU, but no fuel going into the engine then its either a blown fuse, a leak in the supply to te engine which you would know about because of puddles and smell, or this switch.
2006-10-31 04:26:52 · answer #3 · answered by Bealzebub 4 · 0⤊ 0⤋
I had this on another make of car and it turned out to be the crankshaft sensor. The ECU needs to know the engine is turning over before it will power up the fuel pump and HT system. Also check the battery voltage, some ECUs turn themselves off below 10volts.
2006-10-31 19:20:04 · answer #4 · answered by Rene D 2 · 0⤊ 0⤋
engine has to be spinning and computer needs to see this ( sensors on bell housing and harmonic balancer,) then it will kick in the fuel pump relay,
on older ( 80's ) cars the two sensors from bell housing attach on top of the valve cover, and on two of my cars the connectors have broke and not made good contact,
2006-10-31 03:04:49 · answer #5 · answered by rich2481 7 · 0⤊ 0⤋
Try the fusible links..there may be some under teh rear seat as well as in the engine bay. also, in the fuse box....there is a large fuse...about teh size of an old BATA tape....they run about $400.00 at the dealer.
2006-11-01 13:38:20 · answer #6 · answered by bsnodgrass2003 3 · 0⤊ 0⤋
check on the carb on the inlet flap ( is it jammed fully open ) have seen this before and fools the ecu . can undo it with your fingers or screwdriver ..once released will fire up on a turn of a key ...hope this helps just that i had a similar problem years ago on one
2006-10-30 10:11:33 · answer #7 · answered by andy d 1 · 0⤊ 0⤋
could be anything really, but the obvious things to check would be air intake and injectors, make sure car is getting a supply of air and gas i.e no blockages, or maybe could be getting too much gas when you give it throttle
2016-03-19 01:51:37 · answer #8 · answered by Anonymous · 0⤊ 0⤋
if you`ve no spark i`d be looking at the coil ,dizzy or rotor arm
2006-10-31 05:16:51 · answer #9 · answered by trancelator25574 1 · 0⤊ 0⤋
could it be be that you need a new fuel inline filter it maybe blocked ... just a guess.
2006-10-30 09:19:55 · answer #10 · answered by oakesy1971 3 · 0⤊ 0⤋