sideways500

i just got car back and its ok driving on part throttle, but full throttle its missfireing on low boost (18psi). Any ideas anyone ?

Billabong

Car (RS500?), and does it do it at a particular point in rev's, and does it cut, stutter, 'hit a brick wall' ?

rsnissan

iTrader: (9)

plug gap?

sideways500

Yeh its an RS500, with a T34 hybrid and 200 block low comp motor. The set up was fine before it was reshelled. It sounds like its missfiring/stutters, like it hits the limiter(but it isnt), it doesnt cut out. But it only does this when I put my foot down.
CheeRS

sideways500

bttt

RigPig

sounds like a problem with one of the plugs

bigad4x4

It may be a good idea just to take it to a rolling road and get it checked out incase it does any damage, may be cheaper in the long run

Fiecos Dan

as sed, try closeing plug gap up to say 0.5mm, if still misses try

new plugs (if old)
grpA coil
Leads,
Fuel filter and or pump (can check flow at 3 bar, to see these are at fault)


Wot plugs are you running, and gap?

Wot have you changed since it last run well (no missing)?

Butch.

iTrader: (1)

plugs?

sideways500

the plugs are ngks not sure of model as they were fitted by company that built engine and fitted coil pack and omex ecu plugs have done around 2.5k miles will check gaps .
car is runing coil pack and new leads cars got brand new fuel filter and 044 pump with braided lines front to back.
only things ive
changed from full rebuild (full resto/ reshell) engine wise only is 044 pump + braided lines

sideways500

Problem solved! Believe it or not one of the leads from coil pack was not pushed on properly!
CheeRs for all your help... Isnt this a great community!

Billabong

glad it was something simple

cossie4i+

iTrader: (15)

I wish everything was so simple to fix

Was going to suggest the wiring to the fuel pump as this should be upgraded when fitting the 044 pump.

Have you rewired ? might be worth doing.

Steve.

Fiecos Dan