Extreme rich condition

[Perry Mitchell]

I will try fresh gas tomorrow but I don't understand how stale gas makes for a rich condition. I will report what I find. Thank you

[LGAFF]

Pics of gas, plugs after running just a few minutes, plug post flush

[Paul Workman]

Originally Posted by Perry Mitchell

Thanks Paul. This information gives me something to watch and tomorrow I will time the pressure drop on the gauge. Is there a check valve somewhere in the system other than the fuel pressure regulator? Maybe at the pump? However, I don't see how a pressure drop, when the key is off, has any effect on the rich condition I have.

My bad - my unspoken thought was to verify the fuel pressure regulator was not going haywire: I shoulda said that up front (and the rest would have made more sense!).

Clarification needed here: Yes, there is a check valve - one each in both pumps. But, you're correct in that a leak-down test (which I was describing) would not have anything to do with ALL of the cylinders running rich: more an "FYI" for future use perhaps.

[-=Jeff=-]

Originally Posted by Perry Mitchell

Thanks Paul. This information gives me something to watch and tomorrow I will time the pressure drop on the gauge. Is there a check valve somewhere in the system other than the fuel pressure regulator? Maybe at the pump? However, I don't see how a pressure drop, when the key is off, has any effect on the rich condition I have.

Fast bleed off of fuel pressure at key off could show signs of leaking injectors

[Perry Mitchell]

Originally Posted by -=Jeff=-

Fast bleed off of fuel pressure at key off could show signs of leaking injectors

True, however I had the problem with the original injectors. I replaced them with new FIC injectors and the problem continued. I am at a loss.

[-=Jeff=-]

Originally Posted by Perry Mitchell

True, however I had the problem with the original injectors. I replaced them with new FIC injectors and the problem continued. I am at a loss.

So I suggest, pulling plenum, pull injector rails, leaving everything on the rails. Put the rail over a cheap dollar store roasting pans, connect battery, turn key to on, look at injectors. See if any are dripping or leaking.

I bought rebuilt FIC injectors in 2008, I ended up having 2 leakers and no issues since. Still using same injectors.

This will confirm fuel not leaking.

I also think you need to get a scanner on the car while running and see what the data shows. If you don?t have a scanner maybe someone lives close, if you were near me I would be happy to help with my scanner

[Perry Mitchell]

Good advice Jeff. I will probably end up doing just that Wish you were closer to me.

[-=Jeff=-]

If you have an Android device.. you can get ALDLDroid for $20 and then buy a Bluetooth or usb cable and use the android. Or use a windows computer with TunerPro, which is also free.. having these cars especially at 30 years old these tools are helpful

[-=Jeff=-]

This cable and tunerpro on a windows pc would work

http://www.reddevilriver.com/site/mo...aldl.html#2625

[Paul Workman]

Originally Posted by -=Jeff=-

This cable and tunerpro on a windows pc would work

http://www.reddevilriver.com/site/mo...aldl.html#2625

DITTOS on a "scanner". Mine is "NLA", but it has paid for itself many times over in frustration alone! (Have wanted a "Notebook" and Tunerpro for some time. I have a birthday coming up...)