2.5 Drag running rich

[Rivertwins]

I am running dual 2.5 drag's, and am having a problem with one of the motors running very rich and burning a noticable amount of fuel and running about 300 degress less (900 degrees) than the other motor on the pyro's. I have done the following to try and fix the problem: Had injectors cleaned and flow tested, Checked ECU and the A6 maping looked good, checked vacum to box and it appears OK. At this point, I am not sure where to go with this, perhaps Reads? Any help with were to look next would be appreciated.:confused:

[mach351]

Fuel pressure? What kind of regulators are you running and have you checked them?

[RB in NM]

Any certian RPM range it goes rich in ?

This past weekend on one of my 260's, same thing, started running rich in the 4-5500 range. The vac fitting on the horn was plugged up. Cleaned it out good, the tube looked to be free all the way into the box. Thought I was good,,, wrong. Inside the ECU the tube had a slug of clear goop that was still acting as a block. Replaced whole tube with new... good to go again. Russ

[Rivertwins]

I am running the bosh pumps, both motors showing around 55 - 57lbs of pressure.

[Rivertwins]

I cleaned the fitting the horn thinking that might be the problem, it appeared clear, I will take a look at the tube. Just to be clear, I am rich at all levels of RPM from idle on...Smokes like a beotch at idle, cleans up a little under power, you can see black soot on the prop.

[D.B.S]

Check your battery, low volts will send the motor into full rich.

[Rivertwins]

Ya, I thought about that, checked them and they are good, running dual batteries both were good to go.

[Rivertwins]

Just spoke to Eric Simon, he said he is 99% positive its the vacum on the horn, he said you need to pull the horn off to clean it right, all I did was run a small wire through it, he said that will work for a day if your lucky. Guess I will pull the horn and see if that will work.

[RBT]

good advise here, check the air temp sensor in the side of the block