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  #1  
Old 08-13-2007, 01:02 PM
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Error: PO102, PO171 and PO174

Service engine came on and these three errors came up on my OBDII reader. A day later the car would not start. Now I brought it into japanese import auto shop, and said that these problems might not relate to engine not starting. The mechanic said that the fuel pump might need to replace. Are there are correlation between these three errors and engine not starting? If there isn't, will replacing the fuel pump get my car running again?

Thanks.
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Old 08-13-2007, 01:11 PM
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Well that is an MAF code and two engine lean codes. Have you tuned it up lately? I would say that it appears you are not getting enough fuel, but many things besides the pump can cause that.

I would start from the easiest, cheapest fueling problem and work up from there. Fuel filter, etc.

A dead pump would make your car not start. Can you check the fuel pressure at the fuel rail?
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Old 08-13-2007, 02:23 PM
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Tuned it up lately? not really but It's a 2001 4.4i w/ AFE intake and Tech9 cpu chip. I did the chip last summer, and then installed the intake last winter.
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Old 08-13-2007, 04:41 PM
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How many miles (ok km, if you desire)? I had to tune up at 68k. Spark plugs went south and then a lot of other things started happening.

Fuel filter
Check the injectors
Pump

Also, what is the status of your seperator? When the seperator fails, the A/F leans out because of the extra blowby.
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Old 08-13-2007, 05:39 PM
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Quote:
Originally Posted by stev3osl
Tuned it up lately? not really but It's a 2001 4.4i w/ AFE intake and Tech9 cpu chip. I did the chip last summer, and then installed the intake last winter.
Did you recently oil your air cleaner? Did you check to see if excess oil fouled up the MAF? If not, check to see if all the seals from the intake to the back of the MAF are completely sealed and tightened. Good luck.
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Old 08-13-2007, 06:19 PM
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It's at 120k km. Don't think the spark plug has ever been changed. The air filter has not been changed so it might not be excessive oil blocking the sensor. I don't know what a seperator does but here's the driving experience prior to engine failure. Maybe once every two weeks the auto-cranker takes a tad longer to start the engine. Right before the engine failure, the engine would start and everything seems fine, then I drive it for a bit, engine wouldn't take my gas and sometimes would even make a pop/air sound. I didn't even dare to drive it on the highway. At times, it starts for two seconds and engine would shutdown itself.

this is all i can recall for now.
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Old 08-13-2007, 06:22 PM
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and before this thread, I gave the mechanic the go ahead to order the fuel pump, but i think he's unsure if it'll fix any problems.
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Old 08-14-2007, 10:23 AM
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Quote:
Originally Posted by stev3osl
It's at 120k km. Don't think the spark plug has ever been changed. The air filter has not been changed so it might not be excessive oil blocking the sensor. I don't know what a seperator does but here's the driving experience prior to engine failure. Maybe once every two weeks the auto-cranker takes a tad longer to start the engine. Right before the engine failure, the engine would start and everything seems fine, then I drive it for a bit, engine wouldn't take my gas and sometimes would even make a pop/air sound. I didn't even dare to drive it on the highway. At times, it starts for two seconds and engine would shutdown itself.

this is all i can recall for now.
You might have mentioned this in the beginning.

Hard starting, shutting down (presumably due to failure to maintain fuel pressure) and no accelleration when you put your foot down are all signs that a pump could be going out. The computer probably shuts down at a certain fuel psi to avoid blowing up the engine.
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Old 08-14-2007, 12:42 PM
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ya sorry my brain doesnt work logically . You reassured me that replacing the fuel pump is the right choice, thanks for you expertise. Much appreciated for your time.
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