June 21, 20178 yr Afternoon all, I've been having an issue with my car whilst getting it remapped. Brought the car two weeks ago tdo5 fitted, turbo back exhaust, 270lph fuel pump and piper cross panel fliter. When getting it remapped the car was loading with fuel and at the time the boost starts the fuel leans off. 12v at fuel pump, tried 2 fprs, fuel filter wasn't blocked. It's a year 2000 car so has yellow injectors. Any help would be great, thanks.
June 21, 20178 yr I had a similar problem turned out to be a cracked vac line under the fuel return hose by the turbo. As savage said probably unmetered air getting in after the maf. Smoke test?
June 21, 20178 yr Author Cheers guys gonna have a look at all the above mentioned. Thanks for the quick reply, appreciate it. 🖒 The fuel pumps brand new from lateral performance, also tried a maf less ecu still had an issue.
June 22, 20178 yr Author Standard, walbro 225 and another same problem. Sent from my SM-G900F using Tapatalk
June 23, 20178 yr Author I don't have any vacuum in my fuel tank either, no hiss when I remove filler cap. Please tell me if I'm being stupid. Sent from my SM-G900F using Tapatalk
June 23, 20178 yr Check the vacuum lines for splits especially from the purge solenoid and charcoal canister.
June 24, 20178 yr I don't have any vacuum in my fuel tank either, no hiss when I remove filler cap. Please tell me if I'm being stupid. Sent from my SM-G900F using Tapatalk The tank won't always hiss when you take the cap off
July 1, 20178 yr Author Sorry been so quiet was waiting on parts fuelab fpr changed turbo intake hose, y pipe (looked like a hairline crack) but whilst looking today I noticed a crack in my knock sensor.... could this be a culprit? Sent from my SM-G900F using Tapatalk
July 2, 20178 yr Id imagine The mapper should have seen excessive knock while mapping and fuel being added via knock correction if the knock sensor is the issue
July 10, 20178 yr Author Right started to think camshaft sensor..... Sent from my SM-G900F using Tapatalk
July 28, 20178 yr Air/ fuel correction in row 2 is at 25% on a quick glance and without knowing anything else it looks bad, looks as tho it's trying to add 25% more fuel to the map not sure as don't know the software or driving conditions
July 28, 20178 yr What you need to do if possible is log the air/fuel ratio all through the rev range and see where it's leaning out
July 28, 20178 yr Author Leaning out at around 4500rpm mate just popping and bucking only on anything over 1/2 throttle Sent from my SM-G900F using Tapatalk
July 28, 20178 yr Author May have been idle il check again in the morning Sent from my SM-G900F using Tapatalk
July 29, 20178 yr Author Definitely leaning at 4000-4500rpm under full throttle seems to be lumpy on whilst warming up but not when on idle Sent from my SM-G900F using Tapatalk
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