1GGTE TA23 FUEL CUT ON BOOST! any one help?

[PETER.T]

hey guys ive been searching this forum but havnt had much luck i have a problem with my 1ggte its manual but with a A/T ecu i dont have a dash installed in yet.


the car runs perfect doesnt miss a beat but as soon as i hit boost it fuel cuts straight away when i let go of the accelorator it goes back to normal i go to push it and as soon as its about to hit boost its fuel cuts all the time its like have a rev limiter or a speed cut. has anyone heard of this happening?

any information will be greatful

cheers

[pandaah]

is there an aftermarket fuel cut defender wired into the car somewhere?

[PETER.T]

is there an aftermarket fuel cut defender wired into the car somewhere?

as far as i know everything is standard apart from the cooler,piping and exhasust..

[pandaah]

so it cuts as soon as say 3psi of boost is made, or does it try spike up past 12-14psi then cut?

[PETER.T]

so it cuts as soon as say 3psi of boost is made, or does it try spike up past 12-14psi then cut?

it spewls but as soon as it come on boost bang cuts out...so i get no boost at all ..very strange

[pandaah]

hm, they shouldnt really hit boost cut unless for some reason your air flow meter is registering as maxed out?

[PETER.T]

hm, they shouldnt really hit boost cut unless for some reason your air flow meter is registering as maxed out?

so your thinking that my AFM is for the bin?

[pandaah]

possibly... unless anyone else has any ideas?

[Kedderz]

Do you have a boost gauge hooked up to tell us exactly what boost it starts playing up on?

[PETER.T]

i think its because i dont have thge SP wire hooked up..i have a autometer dash made up ready to go in but i dont know how to hook the automneter guage to the the SP wire..i dont have a boost guage set uup but i know that i dont hit boost ill hook up the boost guage and see where it plays up.

[Kedderz]

Its not something as obvious as a air leak or intercooler pipe leak is it?

[PETER.T]

nah ive check that also checked to see if my exhaust was breathing timing changed plugs ect..if the Sp wire is not connected will the ecu shut down?

[timbosaurus]

Iirc, sp is just for the speed sensor and not needed, but I could be mistaken. Will check wiring diags when I'm home next. As for fuel cut, the only thin I know that will do that is the afm signal exceeding the max airflow that the ecu will allow... although things like a faulty tps, or missing ground on a sensor can lead the ecu to kill fuel completely.

[Blair]

How do you adjust the afm if possible?

[PETER.T]

ok ill change the afm and see how ill go thanks guys.