gcfcos

hi guys some advice please. on full chat its fine up untill just over 5,000 rpm then it seems as though its hitting the rev limiter which i believe it should be 6,500 rpm. sometimes it will break through it but its bloody embaresing especially if ya racing some chav up the by pass lol! seems to do it more in 3rd than other gears but done it in second last night which it never done before but its normally ok in 5th though could be load on the engine?? ive changed dizzy cap and rotor arm. gonna try leads next or might shell out the extortianate £400 for the wasted spark kit. i fitted new plugs and set gaps for stage 1.

Cossy Mike

iTrader: (4)

Clean the crank sensor up, they sometimes get gunged up off the front crank seal and check the gap

gcfcos

ive got a brand new one in the garage. ill fit it at the weekend and let you know how i get on. cheers buddy! any ideas on what the gap should be?

buttyrs

i had the same problem with mine turned out to be the blue motorsport leads

Cossy Mike

iTrader: (4)

Between 0.6 - 1 mm

Then it's a process of elimination if it's not that,

phase sensor,

ignition amplifier

garrett

iTrader: (6)

i have the exact same problem with my 2wd sapp
also i have all new sensors and plugs but very old plug leads
i think this is the problem with me and wanted to get some new motorsport leads
but if your saying there no good what then??

stickertone

also, dont forget to change the coil lead, this does 4 times the amount of work the others do and some people dont change it....

g10ens

Had this problem on mine once, was just like hitting a rev-limiter but would sometimes pull through it. I fitted a new crank position sensor and a new phase sensor and it was fine after that.

martysmartie

iTrader: (1)

No the hard cut is at 7000RPM on standard software, it may have been changed as desired by the chip author, it does however has strategy's in between, although not a true soft cut things like missing injection pulses, don't confuse a rev limit with overboost protection though.

When was the fuel filter changed?

Martin

Bloomers

iTrader: (1)

mine was missing like a bastard under any load, turned out to be the ignition amp.

charlie luciano

iTrader: (3)

What's the rev counter doing when it mis-fires? is it jumping around?

Luciano

Yura

same problem can be when car has fuel pressure problems. it is possible that at hi rpm there are not enough fuel

Yura

what was the problem with motorsport leads? Because just now I bought used one ))
Are they not good quality?

busa bob

iTrader: (1)

I had same problem on mine took it to msd an it was the coil, put group a one on its been perfect since.. worth a try mate 2min job to do

cozzyspud

Check that the fuel rail is secure, mine had this problem last week and it turned out that one of the fuel rail brackets had fractured and under full boost it was blowing the injector out of its seat

gcfcos

cheers guys! fuel filter is new as i only just serviced it. ive got a new crank sensor and phase sensor in the garage, ill try fitting them this week as i am off work for holiday. im also gonna spray some electrical cleaner into all the connectors under the bonnet. if that dosent work then im gonna change the leads and then the coil

gcfcos

Turned out to be the phase sensor bought a sensor kit and just changed them untill it sorted the prob