Hi folks i've been scratching my head for a few days with my '08 A5 Coupe, hoping the community here can help.
The car: 2008 3.0tdi Audi A5, stage 1 remap, EGR has been blanked, swirl flaps delete, DPF gutted. Backbox delete. 150k miles, no issues leading up to this.
The scenario: Driving to work, country roads, cruise control around 50mph in sixth. I notice the car "feels" different, can't put my finger on what it is til I get to a roundabout and realise my cars in limp mode. No knocks, no bangs, no lights on the dash.
The details: When I start my car, it's absolutely fine for about 2 or 3 seconds. Turbo actuator moves back and my exhaust sounds deeper/more growly. It's got an EGR delete/blocked off so it's not that. The soft pipe after the EGR sucks in on itself when revving. Negative pressure on the turbo. Scanned for codes, there's two - the left and right engine mount solenoids are staying open. If I delete the error codes the car fixes itself for 2 seconds, then the codes come back up and the exhaust gets deeper again but i've been assured from another mechanic who "specialises" in Audi's that the engine mounts wouldn't have the car in limp mode - i'm not a mechanic so i'm not sure, however removing the codes does fix the car for a couple of seconds.
I've cleaned the MAF, replaced the MAF, checked the MAP, took the turbo off and the little black plastic box off the back (that was a suggestion that they get metal fragments in and it stops it working, went out on a limb because i'm getting desperate). I don't see how the mount solenoids can have that effect and shut off the turbo. I've had the turbo out and both sides look and spin absolutely fine.
DPF's been gutted so likely not that. My dad's a mechanic and has tinkered with his own various Audi's for the past 9 or so years, he's scratching his head too.
So yeah, turbo's fine but isn't working in limp mode obviously, no lights on the dash, no error codes coming up with VCDS other than solenoids. Any ideas?
The car: 2008 3.0tdi Audi A5, stage 1 remap, EGR has been blanked, swirl flaps delete, DPF gutted. Backbox delete. 150k miles, no issues leading up to this.
The scenario: Driving to work, country roads, cruise control around 50mph in sixth. I notice the car "feels" different, can't put my finger on what it is til I get to a roundabout and realise my cars in limp mode. No knocks, no bangs, no lights on the dash.
The details: When I start my car, it's absolutely fine for about 2 or 3 seconds. Turbo actuator moves back and my exhaust sounds deeper/more growly. It's got an EGR delete/blocked off so it's not that. The soft pipe after the EGR sucks in on itself when revving. Negative pressure on the turbo. Scanned for codes, there's two - the left and right engine mount solenoids are staying open. If I delete the error codes the car fixes itself for 2 seconds, then the codes come back up and the exhaust gets deeper again but i've been assured from another mechanic who "specialises" in Audi's that the engine mounts wouldn't have the car in limp mode - i'm not a mechanic so i'm not sure, however removing the codes does fix the car for a couple of seconds.
I've cleaned the MAF, replaced the MAF, checked the MAP, took the turbo off and the little black plastic box off the back (that was a suggestion that they get metal fragments in and it stops it working, went out on a limb because i'm getting desperate). I don't see how the mount solenoids can have that effect and shut off the turbo. I've had the turbo out and both sides look and spin absolutely fine.
DPF's been gutted so likely not that. My dad's a mechanic and has tinkered with his own various Audi's for the past 9 or so years, he's scratching his head too.
So yeah, turbo's fine but isn't working in limp mode obviously, no lights on the dash, no error codes coming up with VCDS other than solenoids. Any ideas?
