sudden power loss ,12 valve
10-07-2005, 05:17 PM
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sudden power loss ,12 valve
I need help diagnosing a sudden loss of power on my 12 valve. Driving home from work today , the go peddle went dead. No smoke, no exhaust heat, low boost. Idles smooth & sounds normal. the first thing I did was change the fuel filter , it had no effect. thanks, doug
10-07-2005, 07:11 PM
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A boost leak would give smoke, wouldnt it??
sounds like a fuel pressure problem to me - do u have a guage setup to measure fuel pressure??
How about the overflow valve? Have you changed yours lately??
sounds like a fuel pressure problem to me - do u have a guage setup to measure fuel pressure??
How about the overflow valve? Have you changed yours lately??
10-07-2005, 09:59 PM
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not boost
boost leak would cause high EGTs & smoke. I got so impute on the 12 valve thread, he suggested the fuel shutoff solenoid isn't pulling up all the way. Sounds like a a good bet I will check it in the morning . thanks for helping, doug
10-08-2005, 11:17 AM
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Dr. Evil:
Sorry, you're right about the smoke with a boost leak. I missed that in his original post. Time for glasses or a retake at the "Evelyn Wood Sped Reding" course.
A fuel problem is more likely. Hope you get it found and fixed easily.
Sorry, you're right about the smoke with a boost leak. I missed that in his original post. Time for glasses or a retake at the "Evelyn Wood Sped Reding" course.
A fuel problem is more likely. Hope you get it found and fixed easily.
10-08-2005, 11:42 AM
#6
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My vote is also for the shutdown solenoid not pulling up all the way. However, if the wastegate actuator diaphragm ruptures and leaks, or the aneroid line breaks, it will cause a boost leak AND loss of fueling, because the aneroid in the pump won't receive pressure.
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