engin surge / flat spot

poizen · Post by **poizen** » Sat May 17, 2008 12:41 pm

hey guys i have a problem when i put my foot flat and it boosts then its a dead flat to me thats no fuel ive checked all the boost lines and the fine so what else could it be pls help

HancoB · Post by **HancoB** » Sat May 17, 2008 4:02 pm

Same here.

As far as I know its fuel. Its either our 15 year old fuel pumps or injectors or something to do with the fuel.

It feels like its a lot of small fuel cuts, it starts at 2500rpm and goes up to about 3800rpm.

I had something like that with my golf, it turned out to be the fuel pump, it couldn't get enough fuel to the injectors so it was starving and it sounded the same.

I'm gonna dyno my car the coming week and once its sorted I'll let you know what it is!

widowmaker · Post by **widowmaker** » Sat May 17, 2008 5:01 pm

elementary! its called G-force

petrol tank is in back, right? engine up front...

HancoB · Post by **HancoB** » Sat May 17, 2008 5:29 pm

On a full tank???

mmm that must be some suspect tank then or fuel lines!

poizen · Post by **poizen** » Sun May 18, 2008 2:17 am

yo hanco shot man yea it must be the pump cos ive done everything except that but yea pls let me know

poizen · Post by **poizen** » Sun May 18, 2008 7:48 pm

well i just changed the fuel filter n wow what a diff it makes i basicly doesnt surge anymore

HancoB · Post by **HancoB** » Sun May 18, 2008 10:12 pm

I changed mine a month ago and it still does that.

poizen · Post by **poizen** » Mon May 19, 2008 7:16 pm

well i found my main fuel pipe had a loose piece in it that could of blocked the filter inlet and a mechanic said it sounds like im running to advanced in my timing

HancoB · Post by **HancoB** » Mon May 19, 2008 7:20 pm

That can be very much like a problem hay! How the hell do you get a loose piece of whatever in there??? That must be sum really dirty ass fuel then!

And the advance timing thing, yes sure can be, but then you would most proly ping. Mine did and I retarded the timing and no it feels like that flat spot!

Will let you know what it is!