Random stalling

[NY87GN]

Newbie, just made new mods to a stock 87 gn. Fuel pump, 60lb injectors, regulator, Translator, lt1maf... Commander chip
Getting random stalls either with foot on gas or not. Scanmaster readings:
02. All over between 400-700's
Af 03-04
L8 39
Bat 13.9
Int jumps from 122-131
Bl 111
Clt 175
Ars 100
Rpm 750-850
Tps 46
Iac jumps between 70-76
Cc jump 60-200
Mal 0
In addition, the idle will also be random between rough and smooth and high and low.
Many thanks for your help..
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[John Larkin]

IAC is set way too high. It should be like 10 or so at idle completely warmed up. Turn the torx screw out by the throttle arm until the number comes down on your scanmaster. It'll probably do alot better afterward.

 

[getdowngranny]

What is your fuel pressure set at? Your BLM's are kinda low. What are they when cruising?


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[NY87GN]

Fp set at 40 with 15 psi of boost.

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[87_we4]

you should be at 43 psi with no vacuum line at idle

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[NY87GN]

Bl are bet 99 115 at Cruz

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[earlbrown]

Fp set at 40 with 15 psi of boost.

WOW. If that's accurate, you've got 25#s with the line off. I didn't even know that was possible.

Based on those numbers, you might have a failing fuel pump, bad regulator, or clogged filter.

 

[John Larkin]

Can't be. He's just saying what the base fuel and current boost is.

 

[getdowngranny]

Bump up the fuel pressure to around 43psi with the vacuum line off, drive around and see if your BLM's change any.


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[notacarlo]

Put the vac line back on after setting base pressure

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[earlbrown]

and zip tie it