I was wondering if someone can help me...when I turn off my truck my engine run's on a bit sort of a rattle sound...and I have been having problems starting in cold weather it seem's to just about to catch and then dies on me

hope smeone can help me

 

sounds like the classic Diesling to me........try changing fuel octane, from say 87 to 89 that might help. umm a can of injector cleaner and a new fuel filter might help.......just some ideas

 

edit:

 

thanks for the info
I did try a higher octane didn't seem to help I was woundering if it could be the timing

 

I am not a professional mechanic, but this is my guess.

You have alot of carbon built up inside the motor. Both in the combustion chamber and on the backside of the valves.

The deposits in the combustion chamber get very hot (to the point of glowing) while you are driving, and when you turn the truck off they act as an ignition source to keep the fuel burning that is left behind in the combustion chamber.

The reason it is harder to start is because of the carbon build up on the back of the valves. The carbon dries out over night, and in the morning when you are trying to start the truck the fuel is being soaked up by the carbon on the backside of the intake valves, when they get a bit saturated the truck finally gets fuel to the combustion chamber and then starts.

You need to get the carbon build up cleaned out. You might try some of the fuel treatments to help this, but really at this point you might need professional help.

Good luck brother

 

thanks for the input...this truck is nothing put giving me trouble as soon as I fix someting then I have to fix another thing what a pice a crap

 

Aren't there special sprays you can put down the intake to clean carbon out of the combustion chamber and valves? Otherwise try a sprayer that has a real fine spray pattern and use distilled water, that steam cleans the combustion chamber.

 

You may have more than one problem. How long has it been since your oxygen sensor was replaced? The first thing I would try would be to run the tank down to near empty, throw a can of B/G 44K F.I. Cleaner in and fill it up with super. Run it down the highway for 100 miles or so and see if the symptoms have cleared up or at least changed. If there is no change, have your codes checked. Good luck.

 

as far as I know the oxygen sensor was never replaced and I don't thing we have B/G 44k F.I. cleaner here in Canada is there another can that I can use insted..The Dealerships never check anything you almost have to tell them what to do..it's like pulling teeth...they spend more time *******ing up my truck then fixing it

 

Try to find this stuff, even if you get someone to mail it to you. It's great. Best FI cleaner i've ever used. I use it every 10k. And i dump a can of spray through the injector.

Hard to believe a dealer is'nt checking stuff over to sell more work.

 

You can try a bottle of Redline SI-1 Fuel system cleaner and maybe a new gas filter. Might be clogged? Techron's good, too.

 

I bought some F.I. cleaner not sure if it's good or not but will see how it is...It's called hot shot ...maybe my FORD need's a shot in the ***..lol

 

How many miles are on this truck? If over 50K and still has the original O2 sensor(s), change ALL of them. These components do not fall under the category of replace only when broken. Over time, the sensor with start to load up with contaminents that will eventually start to slow down the signal being sent to the ECM, which turns into an ever worsening lean/rich condition.

B/G 44K is the sh**!

Keith

 

My father has not changed his 02 sensors. He now has 175,000 mi. on his 97 4.6. Should he have them changed?

 

mf150,
Yes he should have, 125,000 miles ago. They should be replaced every 50K miles. It's his truck, he can maintain it however he chooses, but I don't choose to go down the road of don't replace til it breaks. I doubt that he waited until the plugs started misfiring before he replaced them. Like I said earlier, this component wears out by getting the sensor pickup loaded with contaminents. Some get loaded faster others depending on many factors: Driving habits, weather conditions and climate, quality of fuel, etc. I'm not claiming that his are bad, they may be perfectly fine. It's a similar comparison to a timing belt. They have an average life expectancy, which is why it's recommended they be changed after certain amount of miles. You may get more miles out of it, you may not. Hopefully this clears up any confusion I may have caused.

Keith