Rich after mass air conversion

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05-13-2005, 08:31 AM

95stanggts

Thread Starter

Join Date: Jan 2005

Posts: 10

Rich after mass air conversion

Does anyone know why my 5.0 is running rich after a mass air conversion and B-cam installation? It is more at idle....[&:]

05-13-2005, 11:53 AM

stanglx2002

6th Gear Member

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RE: Rich after mass air conversion

the cam will make it run a little more to the rich side

05-13-2005, 12:56 PM

sc94gt

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RE: Rich after mass air conversion

Did you try resetting the computer yet?

05-13-2005, 05:16 PM

95stanggts

Thread Starter

Join Date: Jan 2005

Posts: 10

RE: Rich after mass air conversion

How do you reset the computer. I have a hand held reader but it does not clear codes.

05-13-2005, 05:27 PM

Derf00

Gentleman's Relish

Join Date: Feb 2005

Location: AZ

Posts: 13,090

RE: Rich after mass air conversion

Quote:

ORIGINAL: 95stanggts

How do you reset the computer. I have a hand held reader but it does not clear codes.

Clearing the codes won't necessarily reset the computer. To reset it, all you do is disconnect the (-) batter cable and let it sit for 5-10 mintues. Then hook it back up. This makes the computer run at factory settings while it relearns everything.

05-13-2005, 05:30 PM

sc94gt

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RE: Rich after mass air conversion

I'll have to dig up the steps again. But there is an idle adjustment screw on the throttle body. I will look it up when I get home from work.

05-13-2005, 07:28 PM

sc94gt

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Join Date: Jul 2004

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RE: Rich after mass air conversion

Here ya go:

1. Clear the EEC-IV's idle memory by disconnecting the battery for 20+ minutes.
2. Disconnect the Idle air bypass solonoid
3. Reconnect battery
4. Start engine and set idle speed to desired RPM with stop screw on throttle body (900 rpm works great with E303 or larger cam)
5. Turn off engine and reconnect the air bypass solenoid - *Optional -- set TPS to 0.90 - 0.95 volts (Do not exceed 1.0 volts MAKE SURE!) Use a digital volt meter!
6. Start engine and let it idle for 2 minutes with no accessories on.
7. Turn off engine for two minutes
8. Start engine again and run for 2 minutes with every accessory turned on.
9. Turn engine off again.
Your computer should have now re-learned the new idle settings. This procedure assumes that you have a clean IAB valve. If it is carboned up then you may need to remove it and clean it with carburetor cleaner.

05-13-2005, 10:23 PM

settled4automatic

3rd Gear Member

Join Date: Jun 2004

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Posts: 613

RE: Rich after mass air conversion

Quote:

ORIGINAL: sc94gt

Here ya go:

1. Clear the EEC-IV's idle memory by disconnecting the battery for 20+ minutes.
2. Disconnect the Idle air bypass solonoid
3. Reconnect battery
4. Start engine and set idle speed to desired RPM with stop screw on throttle body (900 rpm works great with E303 or larger cam)
5. Turn off engine and reconnect the air bypass solenoid - *Optional -- set TPS to 0.90 - 0.95 volts (Do not exceed 1.0 volts MAKE SURE!) Use a digital volt meter!
6. Start engine and let it idle for 2 minutes with no accessories on.
7. Turn off engine for two minutes
8. Start engine again and run for 2 minutes with every accessory turned on.
9. Turn engine off again.
Your computer should have now re-learned the new idle settings. This procedure assumes that you have a clean IAB valve. If it is carboned up then you may need to remove it and clean it with carburetor cleaner.

is that just for mass air cars?? or is that the procedure for speed density also?? i assume that disconnecting the IAB solenoid is like disconnecting the IAC on speed density?