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1 Day Ago
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#1 |
 Join Date: Mar 2023
Location: PA
Posts: 66
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90 stalling issue solved
In the end my friend has a 91 and we swapped his parts to mine and vice versa. Nothing helped, then he remembered from his days in GM class about how gm could not solve the problem but came up with this adjustable vacuum valve inserted into the T fitting above the fuel pressure regulator. It no longer stalls. Though I can force a stall buy going say 50 and come to a fast stop to zero without downshifting. I can live with that. He didn't remember what the part was called or where to get one, but he had one.
Last edited by rufcar; 1 Day Ago at 05:06 PM. |
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1 Day Ago
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#2 |
 Join Date: Feb 2013
Location: New Concord Kentucky
Posts: 181
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Re: 90 stalling issue solved
Interesting, introducing a variable vacuum leak "fixed" the stalling issue.
Graham |
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1 Day Ago
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#3 |
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Join Date: Mar 2023
Location: PA
Posts: 66
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Re: 90 stalling issue solved
Graham, we tried all the standard procedures. My computer on his car would not stall his car. His computer in my car still stalled. Changed all the sensors, did all the step counts, checked pump pressure, Injectors are 5 yrs old with 5k mi. The vacuum adjuster seems to do the trick.
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8 Hours Ago
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#4 |
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Join Date: Feb 2013
Location: New Concord Kentucky
Posts: 181
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Re: 90 stalling issue solved
Basically opening the throttle blades, ie allowing more air at idle. Is your car modified or stock ? Do you have any data logs of the stall condition? If so, what are the IAC counts at a warm idle? What is TPS voltage with closed throttle?
Graham |
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24 Minutes Ago
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#5 |
 
Join Date: Sep 2008
Location: Speedway, IN
Posts: 131
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Re: 90 stalling issue solved
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Linear Mode
