scboost

Hey guys. im new to the c32 game but i did alot of research before i went out to buy my new project. I picked up a mildly modded, less than cared for c32 from florida and drove it all the way back to houston no problems.

Well i was driving about 10 miles to get an alignment when the car just died while coasting to a light. Now it just cranks but no start. Here is some history on the car.

61mm sc pulley and tune from EC
550cc injectors
PLM heat exchanger
and-----e55 fuel pump?? took a look at the pump and since its longer than oem the sending unit thing that the pump sits in is kinda tilted to make fit in the tank.

!!Now this weekend i washed the hell out of the engine bay. it was an insane mess. it still greasy as hell, but i have a feeling i may have messed something up when i was doing this. the lid on the fuse panel for the ecu was loose. i opened it and checked, it seemed mostly dry but i did find maybe a 2 drops or so of water.!!

Checked codes and only SAI pump code present. tried to start car this morning but had no luck.

I thought it may be a CPS sensor but I dont know. i guess i should check fuel pressure somehow as well.

do you guys have any suggestions?????

insame1

This is my first thought. Will the car start again after it cools down?

scboost

Tried this morning. Just cranked but no start

Azeri

check fuel pump

just open the back right sit (passenger), u will see some cover, open it and the there will be round metal cover. Open that cover and u will se the fuel pump then just a little bit hit it with some item. then go and start car, if will be any improvement in cars starting the it is 1000% fuel pump

scboost

Fuel pump is a brand new e55 unit. Only has a 1000 miles on it. Can I cycle the key with top hat off so I can verify the pump is working?

cm60k

Did you check the fuel relay...??

ZAYED,,

91RS

Check it for DTCs. Probably a crank sensor.

scboost

There was only a SAI code

scboost

Just checked all the fuses in the ecu box and rear fuse box. Everything good. Wife cranked carwhile I verified fuel pump relay was activating. I might just throw a new cps on it and see what happens

Supgee

Had a similar condition on my c32, cranks like a champ but would not start... seemed like it was not getting fuel.
I had a blown fuse for the motor electronics, check it out you might have the same problem.
Sounds like a small surge of power blew a fuse or something, maybe your alternator surged or something.


https://mbworld.org/forums/c32-amg-c...ease-help.html
long story short: check fuse #48 in the fuse panel under the hood (driver side, right by the brake booster)

firstshadow

Be sure to get the OEM brand CPS.... bosch I think it was?

scboost

I checked all the fuses. They all seem good. I'll check 48 again but it looked fine

C230 Mulac

You can't go wrong with just getting a CPS and trying that. The one for my C55 was $45, so I'm sure the C32 is around the same. It's a common problem anyway so it WILL go bad at some point, so might as well just do it now.

Not sure what your experience is with MB or other German cars, but best places for parts:

www.rmeuropean.com
www.autohausaz.com
www.pelicanparts.com

Good luck!

insame1

Just a thought but on my CLK the brake light switch went bad and the car would not start. See if you have brake lights.

scboost

I think if it were the brake switch then I wouldn't be able to shift out of park. I'll check anyway. The previous owner told me to check the aux fuel pump. He thinks it may have fell off when he installed e55 pump

cm60k

WaaaW, Brake switch goes bad,>>> car NOT start, soo strange, i didn't know about that....!!??!!

ZAYED,,

cm60k

Did you have a fuel pump relay in the trunk.....??

ZAYED,,

scboost

Yes i have a relay in the trunk. if i didnt the car would have never started. I checked the relay with my hand while my wife cranked the engine. i felt the relay engage and disengage just the way it should.

cm60k

I see,

seems like something weird, if air & fuel are good, nothing else than CPS or SAM module...:/

ZAYED,,

scboost

OK I'm pretty sure its not the CPS anymore. I tried the ole screwdriver at the end of a plug wire trick. It was definitely firing so I have spark. I just must not have fuel. I'm wondering of that aux pump fell off the feed line for the main pump.

Lenin

Can you remove the schrader valve on the passenger side of the fuel rail to see if there is any fuel in the rail? And how exactly did you connect the E55 pump and why?

scboost

Nice its Lenin!!! I was Hoping you would chime in.
Anyways its connected just the same I believe. It barely fits lol. He put it in so I would have more pump once I start making more power with 550cc. Does this make sense?? I'm still new too this car

Lenin

Theoretically, it does make sense. If the E55 pump can flow sufficient amount of fuel for a 5.5 liter engine, it should be plenty for the 3.2 liter, engine even with 550cc injectors. But in reality, there may be other obstructions (filters, regulators, fuel line size) that will impede the flow of fuel. At the same time a higher fuel pressure may impact your AFRs. You need to monitor fuel pressure, injector duty cycle and AFRs if you are swapping fuel system components or you are asking for trouble.
Remove the schrader valve and let us know if you have any fuel in the rail.

scboost

Just opened the pump. The ground popped off of the top of the pump. The pump can't stay centered because its too long and it fell over and pulled the wire off pump. Just recrimped the ground and car started up. I had no fuel level and I got an esp not available warning. Now I'm going to have a old timer ( mustang guy) modify the basket so the pump will fit

scboost

Afrs may definitely be affected. Ii did get 25 mpg hwy back from florida so I don't know by how much. I don't think the fpr or fuel lines will really be affected by a slightly larger pump. I bolted in a 320lph pump by division x in my old sc300 with a 2jz back in the day and nothing happened fpr/fuel line wise