C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1989 stalling

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Old Mar 29, 2010 | 03:39 PM
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Default 1989 stalling

I'm posting this for a friend with a 89 that has a stalling problem. It quit on him the other day and after checking things out thought it was the fuel pump. So that was replaced and now its only running a short time and then stalling. I'm printing out some info. for him to read his codes but I'm not sure will pull one. Anyway if someone could chime in with a similar problem with fixes it might save us a little time and frustration,thanks in advance.

Last edited by ro.co3; Mar 29, 2010 at 06:55 PM.
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Old Mar 29, 2010 | 07:01 PM
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Sorry to all that might of read the above thread when I first posted as I had the wrong year of vette posted but its right now.
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Old Mar 29, 2010 | 07:32 PM
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What is the fuel pressure when it stalls ?
Ohm test those injectors, if they are stock, they are a problem injector.
http://forums.corvetteforum.com/c4-t...questions.html
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Old Mar 29, 2010 | 07:53 PM
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Thanks for the reply,thats the kind of feedback I need.
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Old Mar 29, 2010 | 10:43 PM
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changing the fuel pump probably stirred up some crap and put it through the fuel system. maybe into the fuel filter and regulator and then into the injectors.
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Old Mar 30, 2010 | 09:02 PM
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The car starts and runs fine for about 1/10th mile and then stalls. I ran codes today and got none. Some friends are leaning toward a bad fuel relay but I'm not sure which one it is. So if someone could lead me in the right direction for that relay I'd appreciate it.
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Old Mar 31, 2010 | 11:25 AM
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stock mutec injectors?
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Old Mar 31, 2010 | 03:25 PM
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Originally Posted by ro.co3
Some friends are leaning toward a bad fuel relay but I'm not sure which one it is. So if someone could lead me in the right direction for that relay I'd appreciate it.
There is an oil pressure switch that backs up the relay, if it fails. You can test the circuits to see if there is power, using this schematic.

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Old Mar 31, 2010 | 03:27 PM
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Under hood sensor/relay locations
http://members.shaw.ca/corvette86/Co...0View%2086.pdf
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Old Apr 2, 2010 | 09:47 PM
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UPDATE: We found the problem ,the catalytic converters were plugged. We found someone with a scanner and it saved allot of time. Thanks to all for the help.
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