Question about Cars & Trucks
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Posted on Jan 02, 2017
If it's a 4WD then your front universal joint(s) on the front wheel drive shafts are on the way out and should be replaced. They should be replaced as a pair (both sides) so that you have uniform wear, but you can replace the bad one to solve the problem. The noise should be coming from one side or the other, indicating which one is going bad, but it's most likely the right sive CV joint. Also, it the rubber boot on the end of the driveshaft is damaged or torn, that would point to the offending joint. Your parts store should be able to sell you a reconditioned half shaft to fix the problem. Replacement can be done at home with decent tools.
Posted on Dec 29, 2008
Unfortunately, this problem could be caused by a number of things. A fuel pressure regulator is not usually one of them. The fuel pressure regulator will help to, essentially, regulate and change the pressure of the fuel in the fuel rail as the engine RPMs change. This change is usually minor, however, and will not interfere with the initial startup of the vehicle. I can give you a few basic ideas of where to look, I have seen this same problem on other 5.3L motors, but I have also seen it on many other cars as well, and the problems never seem to be consistent. If the truck has had a fresh tune up, and the filters have all been changed (most notably, the fuel filter) then the first thing to look at is going to be the throttle body. On the intake, there is a butterfly valve- if this is all gummed up with carbon or other deposits, clean it! (Note, it is best to wipe down well with a clean cloth, be as gentle as possible. Hold the butterfly valve open by hand or have a friend hold the gas pedal down (with the truck off, of course), and wipe this down thoroughly. You will have to take off the air cleaner and tubing first, in order to reach this. If this doesn't help, you could have a vacuum leak. You could have a bad Throttle Position Sensor, or a bad Mass Air Flow sensor. If your fuel return line is clogged or vapor locked, it will make it harder to start the vehicle. If the fuel pump is putting out sufficient pressure, but not the intial sufficient volume you need, that could also be a problem. There are a LOT of things that could cause this realistically, but the best thing to do is to eliminate the easiest problems one by one. Keep up on the maintenance, routinely check your filters and spark plugs, and DO NOT use cheapo parts. If you determine that it is not a simple failure, or are not comfortable with testing fuel pressure or volume output, checking the intake manifolds for minor vacuum leaks, etc. it may be best to take it to a professional who is trained to do that. Look for a shop in your area with a good reputation, as this isn't just a routine problem, and will take good diagnostic abilities and a skilled technician to fix it.
Thanks for asking!
Posted on Nov 07, 2009
Testimonial: "Thank You for your help I was hopeful it was simple seeing that it always starts second try when cold & when warm it starts on first Try."
look at the front lower engine mount. I had similar noise which has been driving me nuts, thought may be thesway bar links, put it on friends hoist and saw that the front engine mount (mounted to bottom of lower radiator support) was cracked and the rubber bushing inside very worn with pieces missing. odd thing is that reving, or putting into gear never caused it to make a noise, just certain bumps. I ordered part from Autozone,hopefully it gets here before the holiday week end is over.
Posted on May 29, 2010
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