16v fueling problem ??

[YellowTurbo]

Any ideas what could be wrong with my 2l 16v nova....if i put my foot to the floor the it misses really bad but still accelarates....where as if i put my foot down gentely it will go over 6k revs fine without missing....sounds like a fueling problem to me....any ideas?

[jim sri]

have you tried reading any fault codes the ecu may be giving?-the fuelling is all controlled by the ecu, the problem could be one of the engine sensors, i had fun with the odd faulty one or two on my last valver.
basically as long as the timing marks are all aligned correctly manually, and the plugs/leads/dizzy are good, it points to an engine sensor potentially at fault...

[Dicko]

you say its a fueling problem but havent lised what fueling system you are using.
unless you have a mpi pump runing around 0.8bar+ with a proper tank yes very likely its a fuel problem!!

[jamesburrows]

I have the same problem with my vavler, its running a standard nova GSI fuel pump and tank.
If you put ur foot down real fast, it coughs and splutters. but other than that it drives fine.
My mate is a vauxhall tech so im going see if he'll plug it into the tech computer

[Dicko]

if you got nova gsi stuff itl be high pressure and should be fine!!

does it do the same all up the rev range or just lowish revs?

[Alex]

sound like the problem i had on my 1.2spi engine when the fuel pump was on its way out. it couldn't even start the 1.6 that was put in

[jamesburrows]

It just does it from low revs, and only when you put the throttle down real quick. I thought maybe it was the throttle postion sensor..

[Dicko]

hmm. could be timing related then also, or something else. if it was low fuel pressure it would more likely do it mid range wehn its usin the most fuel