4.7l Hard Starting - Fuel Pump?

From : richardx

Q: had it in the shop and the best they could tell me was that it might be the idle air control motor. thats allot cheaper than the fuel pump that the other post suggested.... if its an iac problem then cracking the throttle plates open a bit while cranking light pressure on the accelerator pedal would alleviate the hard starting problem. you should check the fuel pressure in the fuel rail after engine shutdown. there should be a test port on the fuel rail - middle of the passenger-side rail should be a black plastic cap that you can unscrew. ideally you want to hook a gauge to this and still read pressure 30 minutes or so after shutting down. when you turn the ignition switch to on you should immediately within a second see 45psi in the rail. if you have low or no fuel pressure in the rail 30 minutes after shutdown you have a leak somewhere. if the pressure drops immediately upon shutdown the problem is in the fuel pump module check valve. if it drops off very slowly then it might be a small leak in the fuel pump module or it could be a leaky injector any black smoke upon startup now. if the pressure doesnt immediately come up with the ignition on then its most likely a bad fuel pump. .

Replies:

From : tom lawrence

tbone t-bonenospam@nc.rr.com wrote in on tue 05 apr 2005 022358 gmt alan petrillo asp@baylink.com wrote bob g. wrote the honda accord with the electric motor rated at 29 & 37 racked up 20.4 mpg i have no experience with the accord hybrid but my mothers civic hybrid did a real-world 47mpg on the highway on a trip to new jersey and back from florida late last year. ============ my original post a few weeks ago was just because i could not believe these... wonderful... hybrids were getting such poor relative to their advertised fuel mileage... why should this surprise you if you actually read what was said you would see that these cars were being driven in their worst possible way and under the worst conditions. if you operate them as they were intended the mileage would get much closer to what they are advertized to be in many situations. nonsense - its exactly the opposite. advertised mileage is almost always fiction. for many people the way those cars were driven are considered normal driving. not surprised on the mileage your moms civic got on the trip... hell my corvette got 34 mpg on a 400 mile run down the interstate ..with the speed control set at 82 mph... no starting or stopping very little acceleration...pretty level terrain... yea because you were driving it under ideal conditions and not the way it was intended to be driven. if you get on it since it is a sports car in the city i bet that you get about half of that mileage. just like hybrids will get less than half their advertised mileage when theyre driven under real world i.e. horrible conditions. still 30 percent less then your moms car...but it made me happy... im sure that it does but that is not realistic driving and ill bet that a hybrid under those conditions perhaps not that fast would be getting closer to 60 mpg. you really need to compare apples to apples. its very simple - hybrids driven normally in the real world dont get anywhere near their advertised mileage. .