Author Topic: Does your M42 not want to go? (Read 3549 times)

EN318isPDX · « **on:** May 12, 2008, 04:32:44 PM »

mine has had idle issues and getting up and going issues for the past few months. I had to replace my entire vacuum and coolant hose system and the ICV. Blam it loved to idle but hated to move from idle! After replacing injectors, fuel filter (again) TPS, also the o2 and ignition system I finally threw a fuel pressure gauge on it and it only was putting out around 13psi at idle up to 18psi at full throttle. So I have a brand new fuel pump on its way to BMW! Mmm only $222.28 after the grand worth of other parts

Cobra Jet · « **Reply #1 on:** May 12, 2008, 05:44:00 PM »

you could have picked up a 255lph fuel pump on eBay for under $80.00.... there are a few threads on here with others who have replaced just the fuel pump w/ a Walbro fuel pump and saved that huge expense from the BMW Dealer.

EN318isPDX · « **Reply #2 on:** May 12, 2008, 06:00:10 PM »

Quote from: Cobra Jet;49165

you could have picked up a 255lph fuel pump on eBay for under $80.00.... there are a few threads on here with others who have replaced just the fuel pump w/ a Walbro fuel pump and saved that huge expense from the BMW Dealer.

Good advice thank you! But, personally I dont really trust aftermarket parts. I also am not sure why my pump is only putting out half pressure constantly. Might not be the pump and could be perhaps another part of the pump. I dont mind 200 for an all new pump setup. The bmw list price was 351 but I get it at employee cost so why the hell not.

I hear new fuel pumps in old cars like to go out
New bmw pump has 2 year warranty

RED IS 91 · « **Reply #3 on:** May 12, 2008, 07:23:33 PM »

you should be checking your fuel pressure at the pump.It should be around 42-43 psi.

EN318isPDX · « **Reply #4 on:** May 12, 2008, 07:49:16 PM »

Quote from: RED IS 91;49185

you should be checking your fuel pressure at the pump.It should be around 42-43 psi.

I did. 13 psi just after the filter.. brand new filter... obviously a problem! i am just happy that after all that other crap i finally narrowed it down. Plus i have a shit ton of brand new sensors and rubber. Should run 110% after the new pump. Next comes suspension upgrades

91_318i · « **Reply #5 on:** May 16, 2008, 03:06:19 PM »

i have a feeling ill have to replace mine sometime soon. its buzzing pretty good right now:mad:

EN318isPDX · « **Reply #6 on:** May 16, 2008, 03:32:54 PM »

I never heard mine make a single noise its just pushing 13 psi and my new one (only one in USA) was destroyed in shipping. Now I gotta wait for another one coming from Germany!

futron.sim · « **Reply #7 on:** May 18, 2008, 10:45:15 AM »

Quote from: EN318isPDX;49170

Good advice thank you! But, personally I dont really trust aftermarket parts. I also am not sure why my pump is only putting out half pressure constantly. Might not be the pump and could be perhaps another part of the pump. I dont mind 200 for an all new pump setup. The bmw list price was 351 but I get it at employee cost so why the hell not.

I hear new fuel pumps in old cars like to go out
New bmw pump has 2 year warranty

Walbro is one of the big names when it comes to fuel pump. Their fuel pumps are just as good as Bosch (BMW pumps are made by Bosch).

EN318isPDX · « **Reply #8 on:** May 22, 2008, 08:46:17 PM »

Ya how much is a walbro pump though? probably a similar price. I figure id keep it with what bmw uses, i never cheap out on anything because you get what you pay for.

Lars0ne · « **Reply #9 on:** May 24, 2008, 08:44:14 AM »

stealing the thread for a sec.
anyone know if the fuelpump has a constand 12v power supply?
previous owner made a direct connection from the battery, i dont want my fuelpump to break down due to overload.