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Topic: running rich

in Forum: C3 Engines

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running rich (1/5)
3/5/12 10:03pm

chronos51
Former Member
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Phoenix, AZ - USA

Vette(s):
1982 corvette crossfire production numer C5101985. Color is silver and claret. All original numbers match. slight mods to crossfire for better efficiancy and power balanced and added fuel pressure assembly between throttle bodies,

Joined: 6/12/2011
Posts: 139

wow I just started the 82 and boy she is running rich. its been a few months since I ran her but for my wife to notice that its running rich when she isnt mechanicly inclined what so ever not to dis any ladies out their but my wife really honestly isnt, I think their may be an issue someplace.

any ideas were to start?

I was invited to take her to a few car show's already so I thought I would start early on the after winter storage.

Marcus

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Re: running rich (2/5)
3/5/12 11:49pm

dskopp
Limited Member
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Oak Creek, WI - USA

Vette(s):
1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!

Joined: 5/21/2008
Posts: 1958

That cross-fire system is hard to adjust. Let her run for awhile, give the ECM (you do have one of those don't you?) a chance to work. If all else fails let me know, I may have another solution in mind!!

Dan

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Re: running rich (3/5)
3/6/12 12:06am

Adams' Apple

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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 20128

Do you have a battery dis-connect, or was the battery dead? If so, it may take a few miles of running to get it all "set/relearned" right...
You may have also had a fuel pressure regulator that took a doo-doo while sitting.
I'd say run it for a few miles(if possible), and see if it works itself out. If not, I'd start by checking the fuel pressure, and go from there.

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Re: running rich (4/5)
3/6/12 11:14pm

kwoody
Former Member
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Tucson, AZ - USA

Vette(s):
1982 Black/Tan Leather Build Code C09E Bronze TTop CrossFire Fuel Injection L83 85 Fuel Pump Auto Axle 2.72 Firestone Firehawk Indy500

Joined: 7/11/2010
Posts: 415

Hello,

There are a number of things that can force a "limp home mode". Are there any codes?

In "limp home mode" it runs full rich. In the thin hot air of the desert, I could really feel when
my 82 would drop out of closed loop operation.

All the best.

Keith

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Re: running rich (5/5)
3/7/12 12:04am

Adams' Apple

Good point, Keith. No mention of the "Check Engine" light on, but yer right...if it set certain codes, it would definitely go into rich mode...

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