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Discussion Starter · #1 ·
I used my Scan Master today and here are my results (in park at idle):

AF: 09
L8: 54
BAT: 13.5
INT: 130
BL: 143
CLT: 214
ATS: 71
R: 1025
TPS: .42
IAC: 97
MAL: 23

PS: My idle is horrible and the car wants to cut out. It's running like sh*t!! Please help me out. Thanks, Ted

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87 Grand National
TE-51, 009 Inj, 3' THDP w/Cut out, Test Pipe, 2 1/2' Duals, Art Carr 9', Red's 93/108r Chips, V-2 IC (awaiting delivery).
 

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Clean and reset the IAC. There is directions on how to do this on gnttype.org. It should be in the 10 to 30 range at idle. You have malfuntion code 23 which is the MAT sensor. It might be bad, but I don't think it will hurt that much. Make sure it is plugged in. Coolant temp seems high. It should be around 160 to 170. Do you have a 160 thermostat? If so, your cooling system needs some attention. Your TPS seems good, make sure you are getting around 4.7 volts at WOT too. Your idle problem is in the IAC.

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1986 Grand National [email protected] street ready
1985 T-Type [email protected]
1996 Impala SS [email protected]
 
G

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You may want to look at the MAF sensor.
Normal A/F readings at idle should be 4-7.
Should be about the same in gear also.
RPMs are a bit high too.
Give the MAF the tap test and if idle is affected, change it. But, it can pass the tap test and still be bad.

Paul

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Ron's Custom Automotive
Certified NJ Emission Repair Facility
1-800-718-7667
GSCA # 2306 / PR Director
BCA # 26330 www.ronscustomauto.com
[email protected]
[email protected]

[This message has been edited by Ron Joseph (edited April 16, 2001).]

[This message has been edited by Ron Joseph (edited April 16, 2001).]
 

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At 1000rpm idle, I bet the MAF GPS is around 9 or so..

I say get the idle down to 700-750 and then look at your MAF numbers again. You want to have 4, 5, or 6GPS at a low idle, otherwise, your MAF is not calibrated properly.

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Stock Turbo, Stock Heads, Stock CAM, V4, MSD50's, TH DP, JayJackson 62mm TB, 16position MaxEffort Chip. 3750# with Driver
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General Useless POS
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Originally posted by Ron Joseph:
You may want to look at the MAF sensor.
Normal A/F readings at idle should be 4-7.
Should be about the same in gear also.
RPMs are a bit high too.
Give the MAF the tap test and if idle is affected, change it. But, it can pass the tap test and still be bad.

Paul

RPM was 1025, not that far off. Need to see Key on engine off. wanna see 4-5 gps



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Jim Testa
1986 Regal T-Type
Stock block, Turbomotion ported heads, PTE 210 roller cam, GNT ported intake, PTE Plenum, 70mm TB, PTE FM IC, MSD 50's, TE61, TPS-TEC, JT Chip, JT 200R4, Vigilante 2800 LU convertor, JT Boxed lower arms, working on girlde....
 
G

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Originally posted by TurboJim:
RPM was 1025, not that far off. Need to see Key on engine off. wanna see 4-5 gps


We usually see 3-4, KOEO.

Unless the car has a small converter requiring a higher base idle chip, we adjust for 800 - 900 RPMs motor warm, in park , 600-700 in gear, and nothing else on.
Moreso with the stock cam, you minimize the very slight lean miss sensation most T/R motors have at idle.


Paul


------------------
Ron's Custom Automotive
Certified NJ Emission Repair Facility
1-800-718-7667
GSCA # 2306 / PR Director
BCA # 26330 www.ronscustomauto.com
[email protected]
[email protected]

[This message has been edited by Ron Joseph (edited April 18, 2001).]
 

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General Useless POS
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1,801 Posts
Originally posted by Ron Joseph:

We usually see 3-4, KOEO.

Unless the car has a small converter requiring a higher base idle chip, we adjust for 800 - 900 RPMs motor warm, in park , 600-700 in gear, and nothing else on.
Moreso with the stock cam, you minimize the very slight lean miss sensation most T/R motors have at idle.


Paul

Thats well and good, but IAC counts were 97, RPM was 102x and MAF 9gps. I believe the motor IS at that RPM, the MAF is close and for some reason, the ECM is trying to make it idle there. Whats code 23? MAT code? Is there normally a boost sensing harness on this car? No that code wont cause the high idle. Hmm 214 degrees, its not on cold idle. Somethings dryhumped there.



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Jim Testa
1986 Regal T-Type
Stock block, Turbomotion ported heads, PTE 210 roller cam, GNT ported intake, PTE Plenum, 70mm TB, PTE FM IC, MSD 50's, TE61, TPS-TEC, JT Chip, JT 200R4, Vigilante 2800 LU convertor, JT Boxed lower arms, working on girlde....
 
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