What Is Wrong With My 2004 3.9 Motor?

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P0316 is a misfire on startup for the first 1000 revolutions. How many miles and when was the most recent tune-up done?
140,000. In the past two months, I have replaced plugs, plug wires, air filter and fuel filter. Before changing the plugs and wires I was getting a #3 cylinder misfire. After plugs and wires, no #3 misfire, but the mid to upper rpm surge was evident. Surge is still there after the filters were changed. #316 code was triggered for the first time yesterday.
 
Check your fuel pressure under load. Could be a fuel pump going out.
I have a fuel pressure gauge, but I don't see a stock fitting on the fuel rail to hook it to. How do you go about checking the pressure on this system, splice into the fuel line and install a gauge? Is the attached picture showing the regulator, if so, do you install the gauge before or after the regulator?
 

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Yeah don't splice anything, if there isn't a schrader valve on the fuel rail you can get an adapter to go inline before tw fuel rail. But let's not get ahead of ourselves, if you are getting a p0316 now id suspect your having an ignition related intermittent misfire. Check the coil. Sometimes they will get hairline cracks on tw bottom of them. I see it all the time.
 
Yeah don't splice anything, if there isn't a schrader valve on the fuel rail you can get an adapter to go inline before tw fuel rail. But let's not get ahead of ourselves, if you are getting a p0316 now id suspect your having an ignition related intermittent misfire. Check the coil. Sometimes they will get hairline cracks on tw bottom of them. I see it all the time.
A couple of posts back I explained the #3 misfire code I had before replacing plugs and wires. Since then, no #3 misfire. At that time I suspected the coil, but didn't see anything wrong with it visually. Autozone claims that they can't test the coil pack, I didn't want to just swap it out on a hunch. Is there a way that I can test it out. Can the coil have an intermittent problem and not send a trouble code to the computer?
 
Yeah with an intermittent misfire it might not set a code. No real way for a do it yourselfer to test the coil but I would still say that it is your suspect. They used that same coil on Taurus/ sable, rangers and f150s and they're easy to find in the junkyards.
 
Even my Peugeot has got similar problem.. i have changed fuel filters and water pump.. but no positive result.. I have checked my fuel pressure its normal.. now from few days there is a noise from engine and last night i found there is leakage from car.. Is it the Tank or Radiator am not sure or something else.. this engine is getting worst day by day.. i am totally fade up with it.. from last one month am try to fix it but at end of day same thing continues..
now i have two options...
1. should i change the engine??
OR
2. should i repair this??

already i have wasted $1000 for this car.. any engine expert???
can someone help me regarding this??



peugeot maintenance