Sai delete question

shoftw

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When deleting the sai system does anything need to be capped off? Im chasing a lean condition on my car and im trying to rule that out since mine is deleted.
 

E1

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How deleted are we talking? just pulling the pump, or pulling all the hosing back to the exhaust pipe?

Just pulling the pump - nothing required.

Gut everything, there is a solenoid in that line that needs to be accounted for, but if it was off and the tubing was wide open, you would surely hear a sizeable exhaust leak.
 

shoftw

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How deleted are we talking? just pulling the pump, or pulling all the hosing back to the exhaust pipe?

Just pulling the pump - nothing required.

Gut everything, there is a solenoid in that line that needs to be accounted for, but if it was off and the tubing was wide open, you would surely hear a sizeable exhaust leak.


Just the pump and rubber tubing that goes to aird valve. The rest is still hooked up. My ltft is +25 at idle and goes down with rpm witch seems to indicate a vaccum leak at idle but im having a hard time finding one.
 

E1

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Get a can of carb cleaner and spray around hose ends, any source of vacuum.

When a vacuum leak grabs the carb cleaner and sucks it in the rpms go up.
 

shoftw

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Get a can of carb cleaner and spray around hose ends, any source of vacuum.

When a vacuum leak grabs the carb cleaner and sucks it in the rpms go up.

This problem has been going on for a long time i was under the impression that it was the iac and because i could not find a oem one,that the aftermarket one was not working correctly .

I finally found a oem one and that didn't fix it, its still acting like it wants to die at idle, stalls occasionally, sputtering, if hold the throttle at 1500rpms it will rev up n down slightly. Also can hear pre ignition at full throttle sometimes and exhaust popping at idle.

I now know it's running lean more so on bank 2. Over the last few weeks i have soaked the motor and vacuum lines in carb cleaner and propane, capped off all vacuum lines one at a time with no change in stft. Also replaced injectors,egr with spear set i had.Only thing left to do at this point is compression test but i don't think thats it because when it runs right it pulls way to hard to be low on compression.
 
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shoftw

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I replaced the bank 1,s1and bank 2, s1 about a 2 weeks ago only because they where the original sensors. On FORScan they where switching properly but i fingered they be a lil lazy after 20+ years.
 

gamefanatic

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Did you spray around the AIRD? What is FORscan showing for vaccum at idle? Have you a vacuum pump to test the vacuum? Assuming there is a vacuum problem.
 

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