Ross Hubbard

Hi Just trying to tune my Link G1 V5, on my 4age with ITBs so that it doesn't backfire. It usually occurs when getting back on the throttle after de-accelerating (one big bang). Â I have followed the directions in the tuning manual by looking at the idle vacuum signal and setting the overrun a few kpa under that figure but havent managed to get rid of it yet (possibly due to dodgy MAP signal with ITBs). Â AF ratios during overrun flucuate from 14-18. Â The car is used mostly for motorsport and I figure having some fuel entering the cylinders on the overrun is probably good as it would aid piston cooling? Â Would one solution be to increase the fuel throughout the rev range at 0 TPS thereby encouraging more complete fuel burn inside the combustion chamber at 0 throttle? Â Just a theory....but Im thinking this could also help with throttle response when getting back on the throttle.

Hi, Im trying to tune a 4age with ITB's with TPS only on a G1 V5. I have got the engine starting and idling OK but the 'ACCEL' fuel seems to be activating on its own when ever I start trying to move to different rows on the map. Its also coming on and off during idle (without any throttle manipulation). TPS is set up correctly with the correct range. Is this a common symptom of a faulty TPS? or possibly a wiring issue? Also, the system voltage at idle on the PC link is approximately 13.3 volts (14.1 across the battery terminals) Could this lower voltage affect the 5 volt TPS-in?