turbosuzi
Member
HI guys, I recently purchased a 2001 tdi beetle that needs to pass smog. I started searching here and on the net on the fixes for limp mode issues. the code that I got from the PO was a p1556 low boost signal. I went through the whole program for fixing that code from tdiclub and myturbodiesel. I swapped a 1.6TD in my suzuki samurai, a golf 1.6D na and am comfortable with the mechanical inj motors, TDI/VNT is new to me.
The symptoms are: check engine light comes on about 15 seconds after startup(dirving or idling), low power once it gets to 45 mph( limp mode right?) the code i have is from a obdii not VAG. I looked up the closest VAG mechanic from the map here and the guy doesnt have vag reader anymore. So i wanted to try to fix it my self.
So far I have cleaned the vnt actuator (checked with vac on actuator tube for 1/2" movement), vanes(oven cleaner method), egr, intake manifold, replaced the MAP and MAF sensors, and changed the vac lines. im not sure hos to check if the n75 is working correctly or not. I hear that you can swap it with the valve next to it. Ill try that today but wanted to see if anyone has any other insight for me at this point.
I have an appointment for a VAG diag next week but I thought Id try to get it gong by then if I can. $120.00 for the diag.
The symptoms are: check engine light comes on about 15 seconds after startup(dirving or idling), low power once it gets to 45 mph( limp mode right?) the code i have is from a obdii not VAG. I looked up the closest VAG mechanic from the map here and the guy doesnt have vag reader anymore. So i wanted to try to fix it my self.
So far I have cleaned the vnt actuator (checked with vac on actuator tube for 1/2" movement), vanes(oven cleaner method), egr, intake manifold, replaced the MAP and MAF sensors, and changed the vac lines. im not sure hos to check if the n75 is working correctly or not. I hear that you can swap it with the valve next to it. Ill try that today but wanted to see if anyone has any other insight for me at this point.
I have an appointment for a VAG diag next week but I thought Id try to get it gong by then if I can. $120.00 for the diag.