'90 vert running rich
Thread Starter
Racer
Joined: Dec 2004
Posts: 470
Likes: 0
From: Phoenix Arizona
'90 vert running rich
Little history, in December 2006 had a dealer install a GM Crate motor 350ci, 330 hp /384 tq kept the TPI (I know mistake),original injectors. Replaced headers with Hooker 2151, Corsa duel exhaust, had a chip made by a forum vendor (who will remain nameless).
March car began rough idle, replaced 02 sensor, and new Bosch 24# injectors, an adjustable fuel pressure regulator, and fuel pressure gage attached to the schrader valve. I adjusted the fuel pressure down so it is between 38-40, will adjusting the fuel pressure solve the problem, or do I need another chip made? I average 13.5-14 mpg around town. The car runs good just rich.
Thanks in advance for your help
March car began rough idle, replaced 02 sensor, and new Bosch 24# injectors, an adjustable fuel pressure regulator, and fuel pressure gage attached to the schrader valve. I adjusted the fuel pressure down so it is between 38-40, will adjusting the fuel pressure solve the problem, or do I need another chip made? I average 13.5-14 mpg around town. The car runs good just rich.
Thanks in advance for your help
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
I would be best if you could get a real time scan done. The BLM count will show just how rich it is. What have you checked on the car at this point besides the above? Do you have any codes? What do the spark plugs look like?
Adjusting the fuel pressure will help, but only slightly. If the chip you are using is tuned for 22# injectors and you are running 24# injectors, you will probably need a bin change.
Adjusting the fuel pressure will help, but only slightly. If the chip you are using is tuned for 22# injectors and you are running 24# injectors, you will probably need a bin change.
Thread Starter
Racer
Joined: Dec 2004
Posts: 470
Likes: 0
From: Phoenix Arizona
I would be best if you could get a real time scan done. The BLM count will show just how rich it is. What have you checked on the car at this point besides the above? Do you have any codes? What do the spark plugs look like?
Adjusting the fuel pressure will help, but only slightly. If the chip you are using is tuned for 22# injectors and you are running 24# injectors, you will probably need a bin change.
Adjusting the fuel pressure will help, but only slightly. If the chip you are using is tuned for 22# injectors and you are running 24# injectors, you will probably need a bin change.
Thanks
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
That is possible as long as the other engine components are in good working order. I would pull the plugs and see what they look like. If they are black/carbon/wet, you are definately running rich. There are a number of things that can make an engine run rich.
Do you have a 90 FSM (Factory Service Manual)?
Do you have a 90 FSM (Factory Service Manual)?
Advanced
Joined: Oct 2003
Posts: 77
Likes: 0
From: Cave Creek AZ
Hi Jeff,
Which side of town do you live on? I'm always curious about what auto shops corvette owners take their car to in AZ. What shop are you using?
I can scan your engine for you but don't have time to burn you a chip. I run full time on a emualtor. You can scan it yourself if you get a ALDL to RS232 cable, free scan software (WinALDL) , and a laptop.
The monsoon can't get here soon enough,
Beth
Which side of town do you live on? I'm always curious about what auto shops corvette owners take their car to in AZ. What shop are you using?
I can scan your engine for you but don't have time to burn you a chip. I run full time on a emualtor. You can scan it yourself if you get a ALDL to RS232 cable, free scan software (WinALDL) , and a laptop.
The monsoon can't get here soon enough,
Beth
Thread Starter
Racer
Joined: Dec 2004
Posts: 470
Likes: 0
From: Phoenix Arizona
Hi Jeff,
Which side of town do you live on? I'm always curious about what auto shops corvette owners take their car to in AZ. What shop are you using?
I can scan your engine for you but don't have time to burn you a chip. I run full time on a emualtor. You can scan it yourself if you get a ALDL to RS232 cable, free scan software (WinALDL) , and a laptop.
The monsoon can't get here soon enough,
Beth
Which side of town do you live on? I'm always curious about what auto shops corvette owners take their car to in AZ. What shop are you using?
I can scan your engine for you but don't have time to burn you a chip. I run full time on a emualtor. You can scan it yourself if you get a ALDL to RS232 cable, free scan software (WinALDL) , and a laptop.
The monsoon can't get here soon enough,
Beth
I agree we need the Monsoon to cool things off .....if it can just wait until after 7:00 pm when I get home......clean car thing.
Thanks for the help
Advanced
Joined: Oct 2003
Posts: 77
Likes: 0
From: Cave Creek AZ
Free scan software:
http://winaldl.joby.se/
Cable to hook between ALDL connector and RS232 port of laptop:
http://www.akmcables.com/ic.htm
The cable was about $100 but you can make one too.
...then let the learning begin!
Exotic Muscle...another forum member mentioned them. I haven't heard of them but definitely stay away from ADS (Arizona Diagnostic Specialties) in Chandler.
http://winaldl.joby.se/
Cable to hook between ALDL connector and RS232 port of laptop:
http://www.akmcables.com/ic.htm
The cable was about $100 but you can make one too.
...then let the learning begin!
Exotic Muscle...another forum member mentioned them. I haven't heard of them but definitely stay away from ADS (Arizona Diagnostic Specialties) in Chandler.
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Thread Starter
Racer
Joined: Dec 2004
Posts: 470
Likes: 0
From: Phoenix Arizona
Glad you mentioned the company in Chandler, I believe the dealer who installed my engine referred me to that company and for some reason I did not go.
Exotic Muscle is good, Merl is right off the 202 Rio Salado exit. BTW I am in the Ahwatukee Foothills long way from Cave Creek.
Thanks for the information
Exotic Muscle is good, Merl is right off the 202 Rio Salado exit. BTW I am in the Ahwatukee Foothills long way from Cave Creek.
Thanks for the information
