Sensitive starting issue....

[MAF]

I have my 6.3 running, and am trying to run through some good premium,and see what it needs.
I have no problem starting when cold,but after it runs up to temperature, and I drive 10 miles or so, I park it, and have a burger,at restart ,it wants to buck and miss, and feels/ smells rich, and tries to,(I think), flood out. Sometimes refusing to start at all.So, I leave it to go completely cold, and it starts nicely, but smells very rich.
When warm, 175 indicated,it idles nicely,at about 600 RPM indicated - on the dash tach.
Any ideas on where to start looking? Thanks!!
Already did new fuel filter,air filter,oil/filter.

[Todd Miller]

Consider check for vacuum leaks, and then your next step would be adjusting the mixture. I would also put a can of BG44K injection cleaner in the fuel tank (buy it on ebay) and then take it out on the road for an hour.

[mbgingerbread]

Todd;
My wife drives a 2006 Chevrolet Impala with 61K. Would you recommend the BG44K injector cleaner for this car as well? And also, will this treatment serve as an acceptable cleaner for her car instead of taking it to the dealer for a fuel system flush as was suggested by them the last time the car was in for an inspection?
Thanks,
Turner

[el sea]

Ethanolism, a condition of the fuel system, more recently known to plaque older vehicles and marine craft.

Treat the cause...

Here in Florida Ethanol started out at no more than 3% since it has been elevated to no more than 10%, but reports are out with as much as 22% being added.

Again, treat the cause.

Not all fuel treatments are equal, do your home work or contact me off line if you have any question.


Luther Carrier
St Petersburg, Fl

[Gurunutkins]

Hi Maf
what year is the car and is it djet?

[Todd Miller]

Originally Posted by mbgingerbread

Todd;
My wife drives a 2006 Chevrolet Impala with 61K. Would you recommend the BG44K injector cleaner for this car as well? And also, will this treatment serve as an acceptable cleaner for her car instead of taking it to the dealer for a fuel system flush as was suggested by them the last time the car was in for an inspection?
Thanks,
Turner

BG44K is well known in the automotive repair industry and has an excellent reputation. Your GM dealer would probably use it, or their own GM product.

If you take a look online (and on ebay) you'll see there's several different products in the BG line. One goes in the fuel tank. One is fed into the intake manifold with the engine running, and then once consumed the engine is shut off for 15min, following that, the car is given a good drive out on the highway. And a third product is for spraying out the throttle body.

I don't know what symptoms your Impala has, so I can't recommend a plan of action. But things like sticking throttle, especially cold, hard cold and hot starting, rough hot idle, slight misfire at stead cruise....can all be associated with fuel injectors that are no longer fogging a nice spray pattern and have started "peeing" in streams. Of course there are other causes for these issues, but it's very common that an "induction service" using BG products will literally have the car running like new again(if your issues are caused by dirty injectors, and goopy or carbon build up in the intake track and on the backs of the valves.

Many shops have a special box that will hold a can of the BG. The plumb that box into the fuel rail, and disconnect power to the electric fuel pump in the car. Then they start the car and run it 100% off the BG, until all the product is gone. I used to do this to BMW's that would come into the shop I worked at. The transformation in how they idled and ran was impressive.

[MAF]

I looked inside the distribuitor today.YUK!!! Bad cap,bad rotor, one set of points has NO contact - on one side.I think I will start with a little tuning.
Gurunutkins- I am the bigger idiot,it is a bone stock 1971.I am afraid I don't know djet.
I currently have Shell premium, a bottle of ATF, and 2 cans of Seafoam, in the tank.I was going to run this out, and then do BG44K.Great stuff, I have used it for years.
I just thought I had plenty of Moose milk already.
I am amazed how well the car runs with all this wrong.Is there a good description , of installing dual points, here ,somewhere?
THANK YOU EVERYONE!!! Mark

[JimFreeh]

Originally Posted by MAF

I looked inside the distribuitor today.YUK!!! Bad cap,bad rotor, one set of points has NO contact - on one side.I think I will start with a little tuning.
Gurunutkins- I am the bigger idiot,it is a bone stock 1971.I am afraid I don't know djet.
I currently have Shell premium, a bottle of ATF, and 2 cans of Seafoam, in the tank.I was going to run this out, and then do BG44K.Great stuff, I have used it for years.
I just thought I had plenty of Moose milk already.
I am amazed how well the car runs with all this wrong.Is there a good description , of installing dual points, here ,somewhere?
THANK YOU EVERYONE!!! Mark

I used to use a dwellmeter when I had a 6.3

Put a business card between one set of points, crank it over and set the gap, then repeat on the second set.

If both points make contact the dwell will reflect the average of the pair, so you can get waaaay off base and still look ok.

Jim

[Pooka]

You will need a dwell meter to set the points. They are easy to use and cheap to buy. You might even be able to borrow one from Autozone. You can set the points without a dwell meter, but they will be off ever so slightly. With a dwell meter you can get them right where they should be.

I know you will have to replace these items before you can go on to other things, but the rich running could be caused by a leaking cold start valve. In case you don't know, the cold start valves are located on the ends of the intake plenums and are removed with an allen head wrench.

For those of you wondering if this is a D-Jet fuel injection system: This is a Bosch Mechanical like the injection pumps used on the diesels.

Pooka