suspect fuel pump

SchumieFan · Post by **SchumieFan** » Tue Nov 22, 2005 8:23 am

ok so on really cold starts (once a week or so)
the"toe" has trouble getting the revs up n i have to pump the gas, it sits on about 250. revs n keeps trying to stall... is this a fuel pump issue or just the fuel expireing???

ahew · Post by **ahew** » Tue Nov 22, 2005 9:55 am

i had a similar problem before with another car. wouldn't say exactly the same, but similar. i had a gtr fuel pump and i had the same stumbling problem when cold starting the car. the issue was the actual power going to the fuel pump wasn't enough and I had to upgrade the gauge of the power and ground lines. this doesn't sound like it's your problem (i'm guessing it's still the stock fuel pump), but I guess checking that the pump is getting the correct voltage may be a start and shouldn't be too hard to find out. you can continue troubleshooting from there.

SchumieFan · Post by **SchumieFan** » Wed Nov 23, 2005 9:28 am

can someone tell me where i can access the fuel filters, is there 1 under the latch under the rear seat and 1 in the firewall somewhere???

Post by **Bennoz** » Wed Nov 23, 2005 12:26 pm

I've just scoured the parts database, there is only one filter I can find. I've changed mine before. Its mounted up on the firewall on the passenger side. Its a bit of a sh*t to get at. (Part no is MB868459)

The hole in the rear seat is for access to the pump itself - it sits right in the middle of the tank, mounted so's that it hangs right into the centre of the tank Other things you may find along the fuel lines are Vapour collector cannisters.

SchumieFan · Post by **SchumieFan** » Wed Nov 23, 2005 8:27 pm

cheers ben, would i get at it from the engine or cabin side of the firewall?

Post by **Bennoz** » Wed Nov 23, 2005 8:32 pm

SchumieFan wrote:cheers ben, would i get at it from the engine or cabin side of the firewall?

Engine side

SchumieFan · Post by **SchumieFan** » Wed Nov 23, 2005 8:36 pm

cheers boss, will have a fiddle in the morning....

then go see if i can find it

payaya · Post by **payaya** » Sat Nov 26, 2005 6:09 am

Im guessing that after the car warms up a bit, the car is fine? I highly doubt its a faulty fuel pump!

Check the ISC 100 bucks i say that is the problem!

Do the rpms drop or rise when AC is turned on?? Put the car in nutral when warm, is there a substantial difference in rpm??

SchumieFan · Post by **SchumieFan** » Sat Nov 26, 2005 9:02 pm

hahahaha i think ive solved the mystery... the car has been parked in the hilly part of my driveway and i think the fuel had just clean run outr of the pipes... started it in the garage yesterday (level) and it was fine