Question About Stock EEC-IV HEGO Sensors / DY-605 vs. DY-606

Italian LX · 04-13-2005, 03:18 PM

I recently found out that there are two different O2 sensors specified by Ford for the 87-93 model year Mustangs. It appears that the DY-605 was used during 87-90 and the DY-606 was used from 90-93.

Does anyone know what the difference in the sensors are?

Here's a link to 50resto's site showing the different sensors specified for each year:
Mustang HEGO Sensors

Any input would be greatly appreciated.

Sendero · 04-13-2005, 03:28 PM

Did Speed Density Mustangs have O2's?

Italian LX · 04-13-2005, 03:30 PM

Quote:

Originally Posted by Sendero

Did Speed Density Mustangs have O2's?

Wicked · 04-13-2005, 03:46 PM

I'm looking around, but maybe its 3 and 4 wire sensors. Both have heaters but the 4 wire has also has the auxiliary ground for the heater circuit, as opposed to being grounded only through the exhaust or uses the common ground as the signal.

Sendero · 04-13-2005, 04:00 PM

Quote:

Originally Posted by Italian LX

Huh, and I though they just run off EEC control only. What does the computer use the input for because I was under the thought that the Speed Density cars did not do any "adaptive strategy" and fuel control.

Wicked · 04-13-2005, 04:25 PM

Quote:

Originally Posted by Sendero

Huh, and I though they just run off EEC control only. What does the computer use the input for because I was under the thought that the Speed Density cars did not do any "adaptive strategy" and fuel control.

Uses it for the same thing all other mustangs do, feedback for fine adjustments of the mixture under closed loop.

Italian LX · 04-13-2005, 04:30 PM

Quote:

Originally Posted by Wicked

I'm looking around, but maybe its 3 and 4 wire sensors. Both have heaters but the 4 wire has also has the auxiliary ground for the heater circuit, as opposed to being grounded only through the exhaust or uses the common ground as the signal.

Nope, they are both 3-wire HEGOs.

Wicked · 04-13-2005, 04:32 PM

Quote:

Originally Posted by Italian LX

Nope, they are both 3-wire HEGOs.

Okay, couldn't remember if my 89 was a 3 or 4 wire. When did Ford go to 4 wire? Any idea?

86GT · 04-13-2005, 09:40 PM

My 86 has 3wire and it was speed density originally. It now is Mass Air and uses the same O2's. They are the E6 part number.

86GT · 04-13-2005, 11:07 PM

This site explains some of the differences. The main difference is the connector. I have the one in fig. 5

http://www.tomco-inc.com/Catalog/c13%20oem2.pdf

04-13-2005, 03:18 PM	#1
Italian LX Daddy x4 ...we're done Join Date: Dec 2004 Location: Oxford, AL Posts: 11,551	Question About Stock EEC-IV HEGO Sensors / DY-605 vs. DY-606 I recently found out that there are two different O2 sensors specified by Ford for the 87-93 model year Mustangs. It appears that the DY-605 was used during 87-90 and the DY-606 was used from 90-93. Does anyone know what the difference in the sensors are? Here's a link to 50resto's site showing the different sensors specified for each year: Mustang HEGO Sensors Any input would be greatly appreciated. __________________ -Brian '86 Mustang GT Convertible '88 Mustang LX coupe '11 Odyssey TE '21 Insight Touring

04-13-2005, 03:28 PM	#2
Sendero Im gonna show her my... Join Date: Dec 2004 Location: Somewhere providing FREE tech support. Posts: 4,269	Re: Question About Stock EEC-IV HEGO Sensors / DY-605 vs. DY-606 Did Speed Density Mustangs have O2's? __________________ I heard it on the internet, so it must be true. "I believe that a person's moral compass can be determined by how he references free men the right to defend themselves." T. Nugent "An armed society is a polite society. Manners are good when one may have to back up his acts with his life." R. Heinlein "Never argue with an idiot. They drag you down to their level, then beat you with experience." -Unknown

04-13-2005, 03:46 PM	#4
Wicked Friends Join Date: Dec 2004 Location: Pell City, AL Posts: 1,371	Re: Question About Stock EEC-IV HEGO Sensors / DY-605 vs. DY-606 I'm looking around, but maybe its 3 and 4 wire sensors. Both have heaters but the 4 wire has also has the auxiliary ground for the heater circuit, as opposed to being grounded only through the exhaust or uses the common ground as the signal. __________________ 2001 Cobra 'Vert Procharged and Intercooled 455rwhp/441rwtq Work Car: 2005 Honda Odyssey 400 whp Turbo V6, 6-speed, full cage, H&R Suspension, Brembo Brakes

04-13-2005, 09:40 PM	#9
86GT Member Join Date: Mar 2005 Location: Sacramento California Posts: 449	Re: Question About Stock EEC-IV HEGO Sensors / DY-605 vs. DY-606 My 86 has 3wire and it was speed density originally. It now is Mass Air and uses the same O2's. They are the E6 part number. __________________ EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more.

04-13-2005, 11:07 PM	#10
86GT Member Join Date: Mar 2005 Location: Sacramento California Posts: 449	Re: Question About Stock EEC-IV HEGO Sensors / DY-605 vs. DY-606 This site explains some of the differences. The main difference is the connector. I have the one in fig. 5 http://www.tomco-inc.com/Catalog/c13%20oem2.pdf __________________ EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more.