So I've had the Z twin turbo-ed for about a year now and recently while out and about the car sounded like it was idling rough and I drove down the street and it sounded like it just choked out. Well after taking a look at the pipes and what not I found that one of my test pipes (cat replacements) was cracked. So thinking it was just a boost leak issue the pipe was replaced and we took the time to change out the spark plugs. Well now the car will start up strong and immediately idle rough and shut off. Feathering the gas sometimes will keep it on or it'll immediately shut it off. I'm pretty sure there are no boosts leaks but we also found a couple of codes that were slightly concerning. P1136, P1273, P0223, P0123. Now I'm not a huge car guy. I helped out on the Turbo install and I'm still learning. Anyone got any explanations or ideas on what my problem could be?

 

After seeing these codes come up I would say you should probably replace your throttle position sensor, replace all oxygen sensors (do one do them all I say), and your timing control solenoid valve is bad. The reason your car is probably shutting off is cause the mix of air/fuel isnt right so its basically stalling and when you give it gas it is either running lean or rich thats why it is a hit or miss wether or not it keeps running or dies. You local auto parts store should have everything on hand or local dealership. Hope this all helps and good luck, this stuffs cake.

P1136 Intake Valve Timing Control Solenoid Valve
P1273 Air/Fuel Ratio Sensor 1
P0223 Throttle Position Sensor
P0123 TP Sensor

 

Would you happen to have part numbers on the timing control solenoid valve and the throttle position sensor. Also I'm tracking the 2 o2 sensors coming off my test pipes. What other ones need to be replaced? Can I test the timing control solenoid valve? I appreciate the help.

 

I have never run test pipes but normally theres an O2 sensore before and after the catalytic onverter 4 on a Z i believe. not sure on parts numbers i would say just google it, you would be surprised how much you find out.

 

I could be wrong but I think there is just o2 sensor on the cat pipe right before the widened part of the pipe......