Okay I need help guys. M50tu (vanos)
Problem started when trying to fix small fluctuation of idle.
I've been on this for a week now. code 1222. Here is the scenario. I start my car up it idles fine. 1st stop light just fine. city cruising ( around 5 minutes of engine being on.) 3rd gear @2000 rpms starts to buck ever so slightly. When I go to hit next stoplight take out of gear to stop. Idle drops to 100 shoots up to 1000 bounces between for a length of stop and sometimes stalls out. If I turn off at gas station for a few minutes and drive away its fine for the about 2 minutes.
driving at highway speeds no problem, car cuts out at WOT can hear unburnt fuel popping in the exhaust.
Car will idle fine and get good gas milage and all of a sudden my mpg needle will go down between 25-20mpg and if I come to a stop the engine will surge and die.
After it dies I can start it and throttle it for a minute and it'll idle no problem.
If I step on it it'll go until around 5500 rpms and flatten out.
Stock tune. All plugs are black. I've installed;
New fuel pump,
Known working maf
New icv
Ohm my tps it is in spec.
new fpr,
new o2 sensor.
new coolant temp sensor,
new crank position sensor.
Only code is lambda control 1. I have done smoke test and have no leaks.
Problem started when trying to fix small fluctuation of idle.
I've been on this for a week now. code 1222. Here is the scenario. I start my car up it idles fine. 1st stop light just fine. city cruising ( around 5 minutes of engine being on.) 3rd gear @2000 rpms starts to buck ever so slightly. When I go to hit next stoplight take out of gear to stop. Idle drops to 100 shoots up to 1000 bounces between for a length of stop and sometimes stalls out. If I turn off at gas station for a few minutes and drive away its fine for the about 2 minutes.
driving at highway speeds no problem, car cuts out at WOT can hear unburnt fuel popping in the exhaust.
Car will idle fine and get good gas milage and all of a sudden my mpg needle will go down between 25-20mpg and if I come to a stop the engine will surge and die.
After it dies I can start it and throttle it for a minute and it'll idle no problem.
If I step on it it'll go until around 5500 rpms and flatten out.
Stock tune. All plugs are black. I've installed;
New fuel pump,
Known working maf
New icv
Ohm my tps it is in spec.
new fpr,
new o2 sensor.
new coolant temp sensor,
new crank position sensor.
Only code is lambda control 1. I have done smoke test and have no leaks.
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