SOS! Car Cant Start

[armereth]

As the topic goes, my car couldn't start or rather stay running. Was fine until 2pm yesterday. When I was leaving my office last nite, I started it but shorly after that I heard a loud "boom" sound coming from exhaust area. Then the engine dies. It can be restarted but just die again. Try another time and this time I floored the accelerator, it revs up to 5000rpm but when released it dies again. This is what I suspect and intend to do. Please advise if there are anything else that I need to look at. 1) Check the connection to MAF - could be culprit because the wire was stretched and the insulator worn.2) Check fuel line for leakage - because I had the injector clean on Sunday. Perhaps some clips are not tighten enough3) Check Fuel pump - need advise how to check?4) Check Air flow - may want to try starting by disconnecting the arms to let air goes straight to throttle body5) Check for fuel overflow - was told but not sure how6) Diagnose with MODIC - Any contacts?FYI, I did engine flush, radiator flush, injector cleaning and gearbox oil change a few days ago. Wonder could these be the cause.My car is now in the office carpark where tow truck cant reach. Are they anyone that do repair on-site?'Thanks in advanceArms

 

[OSFlanker]

If the fuel pump dies, you can't rev the engine coz no fuel will reach the engine. Happened to my E36 2 nights ago after tennis. Had to leave the car at the tennis stadium.

I suggest you call your mechanic/workshop and take him to your office carpark.

 

[armereth]

Originally posted by OSFlanker@Sep 8 2005, 09:37 AM
If the fuel pump dies, you can't rev the engine coz no fuel will reach the engine. Happened to my E36 2 nights ago after tennis. Had to leave the car at the tennis stadium.

I suggest you call your mechanic/workshop and take him to your office carpark.

Thanks.

OK, I can strike fuel pump off. How did you get them to fix your car? They do it on-site? ANy contacts?

Thanks
Arms

 

[fabianyee]

check for air leaks... maybe air hose came off... can't be fuel pump if the engine can run....

 

[armereth]

Originally posted by fabianyee@Sep 8 2005, 10:16 AM
check for air leaks... maybe air hose came off... can't be fuel pump if the engine can run....

Thanks.

Called someone in AutoBavaria. He said possible fuel overflow. He advised me to start it and step on accelerator and gradually release until idle. Reason is to warm the engine enough to clear off all excess fuel. WIl try this afterward.

Anyway, I am concern on how this can happen. DO you reckon that I should readjust the mixture after cleaning the injector since it is now more efficient?

cheers
Arms

 

[bmwky]

when was the last time you had your engine tuned? from what you describe, it doesn't look good. connections doesn't come off by themselves something must have triggered it.

 

[armereth]

Update!

Check MAF wiring. Seems OK. Restart car and try to maintain at high RPM but diffcult. It fluctuate. Disconnect air arm to throttle body and restart. RPM goes high and low and high and low. Stop the car. Tried again with MAF disconnected. RPM goes very low.

Called AB, ask me to reset ECU by disconnect battery for 20 second and reconnect and start. Keep idling for 3 minutes to relearn.

Any other advise?

Thanks
Arms

 

[fabianyee]

don't u have a regular mechanic who u call summon over to check on the car??? checked the hose to make sure all intact??

 

[armereth]

Originally posted by fabianyee@Sep 8 2005, 03:50 PM
don't u have a regular mechanic who u call summon over to check on the car??? checked the hose to make sure all intact??

Nolah, my regular mechanic is my fren and he is specialise in windscreen only. I get him to do servicing because its simple. The car never give me any problem before. Air hose, fuel hose are all intact.

Fiedzulshah did recommend a BMW mechanic for me. I will try one more time afterwards before I call him.

Thanks
Arms

 

[bmwky]

the symptoms you describe points to some faulty sensors sending erractic signals to the ECU. however, I do not know what sensors are involved in the M50 engines. if it is M20 I would check the throttle position sensor first, next will be the oxygen sensor.

 

[capkel]

Not sure about the M50 but have you checked the idle valve since you mentioned that the rpm is erratic and the engine keeps dying out. Very similar symptoms to my M20. Cleaned the ICV and no more problems.

 

[armereth]

BMKY,

Yes, could be faulty sensor but I really do not know how to check. Anyway, I will replace the fuel pump relay afterwards and see how. If dont work, I am arranging for it to be towed to my fren shop and probably get someone from Bavarian Auto to come over. Good news is I managed to get it out of the basement last nite. By balancing between high rpm and slow clucth release.

Capkel,

Doubt it to be ICV because it was very smooth before and this come suddenly. Anyway thanks for the advise

Cheers
ARms

 

[armereth]

Update!

Shit! Towed all the way to workshop. Paid RM150 towing charges somemore. Found out that the problem is just loose hose!!!!! Damn.

Arms

 

[flash]

Originally posted by armereth@Sep 9 2005, 12:17 PM
Update!

Shit! Towed all the way to workshop. Paid RM150 towing charges somemore. Found out that the problem is just loose hose!!!!! Damn.

Arms

Bummer.... :beaten:

 

[et5]

oh no double crap!

 

[armereth]

OK. everything done. Labour, MODIC and change some valve RM100.

Fuuuuhh.

Thanks all for the helps