Idle kpa

Xterminator03

Member

Sep 23, 2004

157

0

16

NEW YORK

Aug 30, 2020

#1

• Aug 30, 2020

• #1

I'm tryin to get my car to idle properly. It Is idling at about 95kpa, afr is very rich and Everytime I lower the fuel demand it shuts off. It has large cam in it but I don't know the exact specs. All I know it was a nitrous build with a solid roller with close to a 600 lift.

 

Last edited: Aug 31, 2020

stanglx2002

CT Material here

15 Year Member

Jul 7, 2005

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Aug 30, 2020

#2

• Aug 30, 2020

• #2

What ECU are you running?

It sounds like you need to calibrate the MAP Sensor, because 100kPa is atmosphere. That would means you would be almost full throttle at idle.

 

Xterminator03

Member

Sep 23, 2004

157

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NEW YORK

Aug 30, 2020

#3

• Aug 30, 2020

• #3

Megasquirt MSPNP2. It has the built in map sensor my vacuum line is connected to the vacuum tree.

 

stanglx2002

CT Material here

15 Year Member

Jul 7, 2005

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Aug 30, 2020

#4

• Aug 30, 2020

• #4

With the key on not running and connected to TunerStudio what value does the Map gauge show?

 

Xterminator03

Member

Sep 23, 2004

157

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NEW YORK

Aug 30, 2020

#5

• Aug 30, 2020

• #5

stanglx2002 said:

With the key on not running and connected to TunerStudio what value does the Map gauge show?

Click to expand...

I will let you know tonight when I get back home

 

Xterminator03

Member

Sep 23, 2004

157

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16

NEW YORK

Aug 30, 2020

#6

• Aug 30, 2020

• #6

stanglx2002 said:

With the key on not running and connected to TunerStudio what value does the Map gauge show?

Click to expand...

the Map gauge shows 100-101

 

Attachments

• Screenshot (31).webp

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Last edited: Aug 31, 2020

a91what

SendMeUrDataLog

10 Year Member

Apr 6, 2011

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Hillsborough county

Aug 31, 2020

#7

• Aug 31, 2020

• #7

If the timing is off [advanced or retarded] or the AFR is way off then the car will barely run. A tune file and a datalog of it doing this will be needed

 

Xterminator03

Member

Sep 23, 2004

157

0

16

NEW YORK

Aug 31, 2020

#8

• Aug 31, 2020

• #8

a91what said:

If the timing is off [advanced or retarded] or the AFR is way off then the car will barely run. A tune file and a datalog of it doing this will be needed

Click to expand...

I will get these files and upload them.

 

Xterminator03

Member

Sep 23, 2004

157

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16

NEW YORK

Sep 1, 2020

#9

• Sep 1, 2020

• #9

a91what said:

If the timing is off [advanced or retarded] or the AFR is way off then the car will barely run. A tune file and a datalog of it doing this will be needed

Click to expand...

A whole new problem. I fixed the timing. i set it to 20 fixed check the balancer adjusted the distributor so it shows 20 degrees. then switch back to use table. However the car is idling at around 2000 RPM. at first i adjusted the idle screw thinking that would help and it did not. In the process the car got very hot. So I stopped tomorrow I will check if the IAC is working properly possibly clean it. Hopefully that fixes the very hi ideal. I have attached the datalog and tune file.

 

Attachments

• CurrentTune.msq

  117.2 KB · Views: 209
• Trying to Idel 2020-09-01_18.44.18.mlg

  462 KB · Views: 171

Last edited: Sep 1, 2020

Xterminator03

Member

Sep 23, 2004

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NEW YORK

Sep 2, 2020

#10

• Sep 2, 2020

• #10

i blocked off the IAC and that seems to fix the high idle. but the KPA is still high from what i seen on others. its around 60-70 . i added my tune files and a data log to see if anyone can help.

 

Attachments

• 2020-09-02_16.48.20 Blocked IAC.mlg

  529.6 KB · Views: 188
• CurrentTune.msq

  117.2 KB · Views: 161

8

88foxy

New Member

Oct 6, 2020

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St. Louis

Nov 10, 2021

#11

• Nov 10, 2021

• #11

I’m having the same problem. Did you ever figure it out?

 

beyondEOD

Active Member

Nov 23, 2019

106

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28

Indiana

Nov 22, 2021

#12

• Nov 22, 2021

• #12

1. Did you check timing as well.
2. It is more preferable to have a dedicated vacuum from the manifold before the vacuum tree on the fender/cowl.