2003 V6 5 speed Problems Solved - Thanks
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2003 V6 5 speed Problems Solved - Thanks
I recently purchased my 2003 S-type, V-6, 5 speed manual with 70000 miles. Great car, but I immediately had some issues. The a/c was randomly blowing hot air, I was getting an engine light with a P0174 code, there was an oil leak at the rear of the engine, there was a slight coolant leak, and it needed shocks. I researched this forum and found answers and suggestions for all. I replaced the shocks, DCCV, coolant overflow reservoir, and fuel trim o-rings. Solved all problems except the engine light and P0174 code. I checked all vacuum hoses and connections visibly and by spraying carb cleaner and watching for rpm increase. No success. I read a post that suggested it might be a weak battery. I checked voltage across the battery when engine was off and found 11.9 volts. A little weak, but how could this cause the P0174 (right bank lean) readout? I replaced the battery anyway. Now, I have 12.8 v across the battery. I've driven the car 400 miles and no engine fault lights. Thanks for all of the excellent advice I received on this forum. I really like the car.
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Those vacuum leaks are very hard to find. I followed JagV8's suggestion and monitored the short and long term fuel trims real time while I sprayed carb cleaner at area's I thought might leak. I found it was the vacuum connection to the intake manifold for my P/B booster.
The engine just adjusts so fast you can't really feel anything when testing it and the fuel trims are VERY sensitive. So they show even the smallest vacuum leak.
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The engine just adjusts so fast you can't really feel anything when testing it and the fuel trims are VERY sensitive. So they show even the smallest vacuum leak.
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kabs3012
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09-12-2015 10:40 AM
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