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vortec tbi motor problems stalling running rich

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Old 08-19-2010 | 12:37 AM
  #1  
co15say's Avatar
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vortec tbi motor problems stalling running rich

the truck seems to run ok till it warms up and then it wants to stall at a stop light or stop sign it also seems to be running a little rich. what could cause it to do this?

vortec heads
BB TB with 80 lb injectors and AFPR
edelbrock intake
custom tuned chip by harris preformance
K&N cold air
magna flow
Old 08-19-2010 | 07:29 PM
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From: CA
Car: 91 S10
Engine: 305 tbi lt1 cam EBL
Transmission: 700r4
Re: vortec tbi motor problems stalling running rich

are you able to datalog? does adjusting(lower) fuel pressure make a difference?
Old 08-19-2010 | 07:50 PM
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Re: vortec tbi motor problems stalling running rich

thanks for replying. what do u mean data log. i have a snap on scanner that will tell me certain things but i dont know if thats what u mean im kinda in the dark on all this stuff. turning the pressure up and down does make a major difference in everything but i cant seem to find a spot where everything is working right. could be timing too? i dont know
Old 08-20-2010 | 11:04 AM
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From: CA
Car: 91 S10
Engine: 305 tbi lt1 cam EBL
Transmission: 700r4
Re: vortec tbi motor problems stalling running rich

data log as in read live data. can you read what your o2 readings are when it stumbles or what the BLM values are? you really won't be able to pinpoint it until you can see what the sensors are seeing. is that a mail order chip? if so it is probably not dialed in yet
Old 08-20-2010 | 11:08 AM
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Re: vortec tbi motor problems stalling running rich

yeah i ordered it by mail i will try to check and see if my scanner will tell me the things u listed. thanks
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